Graupner mc-16, mc-20 Programming Manual

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mc-16 / mc- 2 0 HoTT.1.en

mc-16

mc-20

Programming Manual

General notices

Table of contents .......................................................2

Environmental protection notices ..............................3

Safety notices ............................................................4

Safety notices and handling regulations for Lithium-Ion (LiIo) and Lithium-Polymer (LiPo)

batteries .....................................................................8

Foreword ..................................................................10

Remote control set description ................................11

Technical data .......................................................... 15

General operating notices

Transmitter ..........................................................16

Transmitter power supply...............................16

Charging the transmitter battery ....................16

Charging with automatic chargers .................16

Recommended chargers (accessory) ...........16

Removing the transmitter’s battery ................17

Inserting the transmitter’s battery ..................17

Battery operation timer .................................17

General charging notices ..............................17

Opening the transmitter housing ...................18

Lithium battery CR 2032 ...............................18

Stick conversions ...........................................19

Stick length adjustment .................................20

Transmitter neckstrap support bars ............... 20

Transmitter description

Front side.......................................................21

Face-side connectors

Charger socket .........................................22

DSC jack ..................................................22

Data jack ..................................................23

Headset connector ...................................23

Card slot ...................................................24

Mini-USB connector .................................25

Bottom side transmitter interior .....................26

Display and keypad .......................................28

Operating the “data terminal“ ........................29

Shortcuts ....................................................... 30

Concealed menu columns .............................31

Table of contents

Function ﬁelds in the display .........................32

Position indicator ...........................................32

Entry lockout ..................................................32

Warning notices .............................................33

HIDDEN MODE .............................................34

Language selection

VOICE .................................................34

Change of display language ................35

Firmware update via SD card ...................35

STICK CALIBRATION .............................. 36

Bluetooth initialisation ..............................37

Telemetry data display ................................... 38

Commissioning the transmitter ................................46

Downloading a ﬁrmware packet .........................48

Transmitter ﬁrmware updates .............................50

Restoring the transmitter software .....................52

Receiver initialization ...............................................54

Receiver power supply .......................................56

Receiver system power supply ...........................57

Receiver ﬁrmware updates .................................58

Backing up receiver settings ...............................62

Installation notices ...................................................64

Deﬁnitions of terms ..................................................66

Physical control, switch and control switch assign-

ments .......................................................................68

Digital trim ...............................................................70

Winged models ........................................................72

Receiver layout ...................................................73

Servos in wrong direction ...................................73

Helicopter models ....................................................74

Receiver layout ...................................................75

Program descriptions

16 20*

Loading a new memory location ..............................76

»Model select« ....................................   79

»Copy / Erase« ....................................   80

»Suppress codes« ..............................   84

»Suppress models« ............................   85

»Base setup model«  

Winged model ....................................................86

“Binding” transmitter and receiver .................87

Range test .....................................................91

Helicopter model ................................................94

“Binding” transmitter and receiver .................95

Range test .....................................................99

»Model type« .......................................   104

»Helicopter type« ................................   108

»Servo adjustment« ...........................   112

»Stick mode«  

Winged model ..................................................114

Helicopter model ..............................................116

»Control adjust«  

Winged model ..................................................118

Helicopter model ..............................................122

Throttle limit function ...................................127

Basic idle setting .........................................127

Throttle limit in combination with “AR” in the

»Stick mode« menu ...................................129

»Dual Rate / Expo«  

Winged model ..................................................130

Helicopter model ..............................................134

»Channel 1 curve«  

Winged model ..................................................138

Helicopter model ..............................................141

»Switch display« .................................   144

»Control switches« .............................   145

»logical switches« ..............................   148

How is a ﬂight phase programmed? ......................150

»Phase settings«  

Winged model ..................................................152

Helicopter model ..............................................156

»Phase assignment« ..........................   158

»Phase trim« (Winged model) .............   160

»Non-delayed channels«....................   161

»Timers (general)« ..............................   162

»Flight phase timers« .........................   166

What is a mixer? ....................................................169

»Wing mixers« ....................................   170

Model type: “1AIL” .............................................173

Model type: “1AIL 1FL” .....................................174

Model type: “2AIL” .............................................175

Model type: “2/4AIL 1/2/4FL” ............................177

(Max. 2 ailerons and 2 ﬂaps with the standard 8-channel

mc-16 transmitter)

»Helicopter mixer« .............................   188

Fine-tuning the throttle and collective

pitch curve ........................................................198

Autorotation setting ...........................................202

General notes on freely programmable mixers ......204

»Free mixers« .....................................   205

Linear mixers ....................................................208

Curve mixers ....................................................210

Examples ..........................................................213

»Mix active / phase« ...........................   215

»Mix-only channel« ............................   216

»Dual mixer« .......................................   218

»Swashplate mixer« ...........................   220

»Fail safe« ...........................................   220

»Teacher/Pupil«  

Connecting with a trainer lead ..........................222

Connection schematic ......................................225

Wireless HoTT system .....................................226

»Tx. output swap« ..............................   230

»Proﬁ trim«  

Winged model ..................................................232

Helicopter model ..............................................234

»Trim memory«  

Winged model ..................................................236

Helicopter model ..............................................238

»Telemetry« .........................................   240

Important notices: .............................................240

SETTINGS & DATAVIEW..................................241

Satellite mode ..............................................250

Sensor(s) .....................................................251

SENSOR SELECT ...........................................252

RF ST ATUS VIEW ............................................253

VOICE TRIGGER .............................................254

»Channel Sequence« .........................   256

»Multichannel« ....................................   258

»Ring limiter« ......................................   262

»MP3 player« .......................................   266

»Basic settings, transmitter«.............   268

»Servo display« ..................................   274

»Servo test« ........................................   275

»Code lock« ........................................   276

»Info Display« .....................................   278

*  Standard option  Option can be unlocked at extra cost

Programming examples

Introduction. ...........................................................280

Winged model

First steps .........................................................282

Incorporating an electric drive ..........................288

C1 joystick switchover between:

Electric motor and butterﬂy ....................291

Electric motor and airbrake ....................293

Timer conﬁrmation with control or switch .........294

Parallel operating servos ..................................296

Using ﬂight phases

Example 1 ...................................................298

Example 2 ...................................................302

Control of temporal processes .........................308

Delta and ﬂying wing ........................................310

F3A model ........................................................314

Helicopter models ..................................................318

Appendix

FCC Information ....................................................329

Declaration of Conformity ......................................330

Warranty Certiﬁcate ...............................................331

Environmental protection notices

The symbol on this product, its operating instructions or packaging gives notice that this product may not be discarded as common household waste at the end of its service life. It must be turned over to a recycling collection point for electric and electronic apparatus.

The materials can be recycled according to their markings. You make an important contribution to protection of the environment by utilizing facilities for reuse, material recycling or other means of exploiting

obsolete equipment. Batteries must be removed from the

unit and disposed of separately at an appropriate collection point.

Please inquire with local authorities about the responsible waste collection locations.

This manual serves only as a source of information and can be changed without prior notiﬁcation. Graup- ner accepts no responsibility or liability for errors or inaccuracies which may be contained in the information section of this manual.

3Table of contents

Safety notices

Be sure to pay attention!

In order to enjoy your modeling hobby for a long time, please read these instructions thoroughly and give particular attention to the safety notices. You should also register right away at https://www.graupner.de/ en/service/product_registration.aspx since this is the only way for you to automatically receive current information about your product via email.

If you are a beginner with remote controlled model aircraft, ships or cars, you should really ask an experienced model pilot for assistance.

If this remote control system changes ownership, these instructions should surely be included with remote control system.

Intended usage

This remote control system may only be used for the purpose intended by the manufacturer, i.e. for the operation of unmanned remote controlled models. Any other usage is not permissible.

Safety notices

SAFETY IS NO ACCIDENT

and

REMOTE CONTROLLED MODELS ARE NOT TOYS

… because even small models can cause substantial property damage and/or personal injuries if they are not handled properly - even if caused by third parties.

Technical defects of an electrical or mechanical nature can lead to unexpected startup of a motor and/or parts being hurled through the air to pose a danger of injury to you and to others.

Short circuit conditions are to be avoided absolutely! A short circuit condition may not only destroy parts of the remote control system but, depending on the circumstances and the battery energy involved, may also pose acute danger of incineration or even explosion.

All motor-driven parts, such as aircraft or ship propellers, helicopter rotors, open gearboxes etc. represent

a constant danger. Contact with these parts must be avoided. A rapidly turning aircraft propeller can, for example, sever a ﬁnger. Also pay attention that other objects do not come into contact with driven parts.

When a drive battery is connected or a motor is running: never get into the danger zone of driving mechanisms.

Be sure to pay attention that motors do not start up unintentionally while performing programming operations. Disconnect the fuel supply or battery terminals to motors before programming.

Protect all units from dust, dirt, moisture and other foreign parts. Never expose these units to vibrations or excessive hot or cold temperatures. Remote control operation may only be performed under “normal” outdoor temperatures, i.e. within a range of -10 °C to +55 °C.

Avoid mechanical jarring and pressure stresses. Always check units for damage to housings and cables. Do not use units which have been damaged or become wet, even after they are dry again.

Only those components and accessories which we recommend may be used. Always use original Graup- ner plug and jack connectors which are made for one another out of the same materials.

When routing cables, pay attention that they are not stressed, unduly kinked or broken. The sharp edges of adjacent parts also represent a hazard for insulated conductors.

Be sure that all plug and jack connections are ﬁrmly seated. Do not pull on the cable to disconnect a plugged connector.

No modiﬁcations whatsoever may be made to units. Modiﬁcations will void the operating permit and all insurance protection. If necessary, send the device concerned to your local Graupner Service Centre; see page 331.

Installing the receiver

The receiver is to be installed with a cushion of foam rubber to afford protection against jarring; in aircraft models behind a strong rib, for a car or ship model the location must be protected against dust and spray water. However, do not enclose your receiver completely, otherwise it may overheat in use.

The receiver may not be mounted in direct contact with the hull or chassis as this would allow motor vibrations and/or roadway jarring to be transferred directly to the receiver. When a receiver system is installed in a model with a combustion motor, all receiver parts should always be protected against the intrusion of exhaust gases and oil residue. Above all, this applies to the model’s ON/OFF switch, which is typically built into the model’s outer surface.

Position the receiver such that connecting cables to the servos and the power supply are routed with a bit of slack and that the receiver’s antennas are at least 5 cm away from any large metal parts or wiring except for other receiver wires/cables. In addition to steel, this also includes carbon ﬁber parts, servos, electric motors, fuel pumps and all sorts of cables, etc.

Optimally the receiver should be placed at a readily accessible location that is well away from all other equipment. Under no circumstances may a servo cable be wrapped around the antenna or routed close to it.

Make sure that cables near the antenna cannot move about during ﬂight.

Routing the receiver’s antennas

The receiver and its antennas must be positioned as far away as possible from drives of any kind. If the model’s hull is made of carbon ﬁber material, the ends of the antennas must extend outside of the hull.

If your model features a carbon ﬁbre fuselage, the aerial tips must always extend outside the fuselage for a length of at least 35 mm. If this is not possi-

Safety notices

ble, it is essential to substitute longer aerials for the standard ones (approx. 145 mm long) ﬁtted to HoTT receiver(s).

The orientation of the aerial(s) is not critical, but it is advantageous to install one receiver aerial in a vertical – upright – position in the model. If your receiver is a Diversity type – two aerials – the active tip of the second aerial should be positioned at 90 ° to the tip of the ﬁrst aerial, and ideally the distance between the two tips should be greater than 125 mm.

Servo installation

Always mount servos with the provided rubber vibration-damper parts. Only in this manner can these parts be protected against excessively hard vibrations.

Installing control rods

Control rods must be installed such that they operate freely and smoothly. It is particularly important that all rudder levers are able to move to their full limits, i.e. not otherwise mechanically blocked.

In order to be able to stop a running motor at any time, control rods must be adjusted such that the carburetor tap is completely closed when the joystick and trim lever are brought into their end idle position.

Pay attention that no metal parts, e. g. as a result of rudder actuation, vibration, rotating parts, etc., rub against one another. Metal-to-metal contact causes electrical “noise” which can interfere with the correct operation of the receiver.

Transmitter antenna orientation

Transmission ﬁeld strength is minimal in an imaginary line extending straight out from the end of the transmitter’s antenna. This means that “pointing” the transmitter’s antenna directly toward the model will not produce good reception but rather degrade reception.

When multiple remote controls are operating simultaneously, pilots should position themselves in a loose

group. Pilots standing off to themselves not only endanger their own models but those of others as well.

However, when 2 or more pilots using 2.4 GHz remote control systems are closer than 5 m to one another this can lead to return channel overdrive which, in turn, will trigger a range warning much too early. Increase your distance between one another until the range warning ceases.

Pre-start checks Before switching the receiver on, be sure the throttle

control is at its Stop/Idle position.

Always switch the transmitter on ﬁrst

and then the receiver.

Always switch the receiver off ﬁrst

and then the transmitter.

If this sequence is not maintained, such that the receiver is still switched on when the corresponding transmitter is switched to “OFF”, then the receiver may respond to other transmitters or general radio frequency noise. This can cause the model to execute uncontrolled operations that may cause personal injuries and/or property damage.

In particular, for models equipped with a mechanical gyro:

before switching off the receiver, disconnect the model’s power supply to prevent the motor from revving up unintentionally.

The residual spin of a gyro often produces so much voltage that the receiver may falsely interpret a throttle signal! This will then cause the motor to start up unexpectedly.

Range test

Perform checks for proper operation and range before every session. Secure the model adequately in place and ensure that no one is in front of the model.

Perform a complete functional test on the ground and

execute a complete simulated ﬂight to exclude the possibility of system faults or problems with the model’s programming. When doing this, be sure to follow the notices provided on pages 91 and 99.

Never operate the transmitter in Model mode, i.e. for ﬂying or driving, without an antenna. Be sure the antenna is ﬁrmly seated in its socket.

Operating a winged aircraft, helicopter, ship or car

Never ﬂy over spectators or other pilots. Never endanger humans or animals. Never ﬂy in the vicinity of high-voltage wires. Do not operate the model in the vicinity of sluice locks or where real boats or ships are operating. Do not operate a model on public streets or highways, paths or plazas, etc.

Never switch the transmitter off whilst operating a model! If this should happen accidentally, keep your nerve and wait until the transmitter screen is entirely blank, i. e. until the transmitter has shut down completely; this takes at least three seconds. Do not switch your transmitter on again until this has occurred. If you neglect this, there is a risk that the transmitter will “hang” immediately after being switched on, and you will lose control of the model. In this case your only recourse is to switch the transmitter off again, allow it to shut down completely, and then switch on once more after the correct interval.

Aero-towing

When operating a powered tug, ensure that the receiving systems in the two models are always at least 50 cm apart. We recommend the use of satellite receivers in such situations. If you neglect this, there is a chance of interference from the downlink channel.

Monitoring transmitter and receiver batteries

You must stop running the model to recharge the transmitter’s battery no later than when low transmitter battery voltage triggers the “Batt must be re- charged!!” display and acoustic signal.

5Safety notices

Safety notices

Check the charge in batteries routinely, particularly the receiver’s battery. Do not wait until the movements of controlled mechanisms are noticeably slower. Replace expended batteries before they cause problems.

The battery manufacturer’s charging instructions are always to be followed, this includes mandatory adherence to the length of charging time. Never leave batteries being charged unattended.

Never attempt to charge primary batteries (non-rechargeable batteries) because they can explode.

All secondary batteries (rechargeable batteries) must be charged before every session. To avoid short circuit conditions, ﬁrst connect the charger cable’s banana plugs, polarity correct, into the charger and thereafter connect the charger cable’s plugs to the transmitter and receiver batteries.

Disconnect all power sources from the model when it is not to be used for an extended period of time.

Never attempt to use defective batteries, damaged batteries or mixed-type battery combinations as a single group. Do not use mixed combinations of old and new batteries or batteries of different manufacture.

Capacity and operating time

The rule: “capacity is reduced with every successive recharging”, applies to all batteries. Internal resistance increases at low temperatures to further reduce capacity. As a consequence, the battery’s ability to provide current and hold its voltage is reduced.

Frequent charging or the use of battery maintenance programs can also result in gradual loss of battery capacity. Therefore the capacity of batteries should be checked at regular intervals, not in excess of every six months, and replaced if performance is found to be signiﬁcantly deﬁcient.

Purchase only genuine Graupner batteries!

Interference suppression for electric motors

All conventional electric motors produce sparks be-

Safety notices

tween their collector and brushes. Depending on the type of motor involved, this may cause more or less interference with the functionality of the remote control system.

The electric motors of a properly built system should therefore have interference suppression features. For electric drive models it is particularly important that every one of its motors is provided with proper interference suppression. Interference ﬁlters extensively suppress such disturbances and should always be included.

Follow the respective recommendations included in the motor’s operating and installation notices.

For further details about interference ﬁlters, refer to the Graupner RC main catalog or in Internet at www.graupner.de.

Servo interference ﬁlters for extension cables

Order no. 1040 The servo interference ﬁlter is necessary when an

extended-length servo cable is used. This ﬁlter is attached directly to the receiver output. In critical cases a second ﬁlter can be attached to the servo.

Using electronic speed controllers

Choosing the right electronic controller is largely a matter of matching controller performance to the motor to be controlled.

In order to prevent an overload or damage to the speed controller, its current rating should be at least half of the maximum locked-rotor current draw of the motor to which it is connected.

Particular attention is appropriate for so-called “tuning motors”. Because of their low-turns coils these motors can draw a multiple of their rated current in a lockedrotor condition and this can lead to the destruction of the speed controller.

Electric ignition systems

Combustion motor ignition systems also produce

interference that can negatively inﬂuence remote control functionality.

Always supply power to an electric ignition system from a separate, dedicated battery.

Use only interference-suppressed spark plugs, spark caps and shielded ignition leads.

Mount the receiver sufﬁciently far away from ignition system components.

Static charges

A remote control system will be destroyed by the magnetic shock waves produced by a lightning strike – even if the storm is miles away. Therefore …

… stop ﬂying right away if a storm is approaching. Static charging via the antenna also represents a lethal hazard.

Attention

• In order to fulﬁll FCC HF emission requirements for mobile transmitters, a distance of at least 20 cm must be maintained between this system’s antenna and other persons when this system is operating. Operation of this system at a lesser distance is therefore not recommended.

• To avoid disturbance caused by the electrical characteristics and emissions of other transmitters, keep at least a 20 cm distance from other transmitters.

• Operation of the remote control system requires a correct program setting for the given country in the transmitter unit. This is necessary for compliance with diverse regulations like FCC, ETSI, CE etc. Follow the respective instructions provided for this with the transmitter and receiver.

• Prior to every ﬂight, perform a complete functional test, range test and execute a complete simulated ﬂight in order to exclude the possibility of system faults or problems with the model’s programming.

• Never program the transmitter or receiver while

the model is being operated.

Care and maintenance

Never clean the housing, antenna, etc. with cleaning agents, gasoline, water or similar means. Use only a dry, soft cloth.

Components and accessories

As manufacturer of this equipment Graupner GmbH & Co. KG recommends only components and accessories which have been tested and approved by Graupner for their suitability, functionality and safety. If this recommendation is followed, Graupner accepts responsibility for the product.

Graupner cannot accept any responsibility for the parts or accessories of other manufacturers which have not been approved and Graupner cannot evaluate every individual product made by other companies to assess if they are safe to use.

Liability exclusion / damage compensation

Graupner cannot monitor compliance with the assembly instructions, the operating instructions or the conditions and methods under which remote control components are installed, operated, utilized or maintained. Theref ore Graupner accepts no form of liability for loss, damage or costs consequential to incorrect usage or operation or which can be attributed to same.

Unless otherwise prescribed by law, the obligation of Graupner to provide damage compensation, regardless of legal grounds, is limited to the invoice value of the quantity of Graupner goods contributing directly to the damage-inducing event. This does not apply if Graupner is found to be subject to unlimited liability pursuant to binding legal stipulations with respect to

intent or gross negligence. Furthermore we will only consider claims if a log ﬁle

is present; see page 24 under “Data recording”. For the same reason the transmitter must always be updated to the latest software status.

It is essential that you register at https://www.graupner.de/en/service/product_registration.aspx to ensure that you are constantly informed of important software updates. This is the only means by which we can automatically keep you aware of new updates by e-mail.

7Safety notices

Safety notices and handling regulations for Lithium-Ion (LiIo) and Lithium-Polymer (LiPo) batteries

As applicable for all highly technical products, observance of the following safety notices and handling instructions is essential for a long service life, fault-free operation, and harmless utilization of lithium/polymer batteries.

These instructions are to be safeguarded. If the unit is transferred to another user, these instructions should certainly be passed along to the new user.

General notices

LiIo-/LiPo batteries require particularly attentive handling. This applies to charging, discharging as well as for storage and other handling. Adherence to the following special speciﬁcations is necessary:

• Incorrect handling can lead to explosions, ﬁre, smoke and poisoning hazards. Furthermore, disregard for instructions and warnings can lead to performance losses and other defects.

• The battery’s capacity is reduced by every charge/ discharge cycle. Storing the battery at temperatures which are too high or too low can also lead to a gradual reduction in capacity. In model operation, battery capacity drops to about 50 … 80 % of new battery capacity after about 50 charge/discharge cycles – even though all charge/discharge rules are followed. This is due in part to the high discharge currents and inductive currents caused by motors.

• Battery packs may only be connected in series or parallel in exceptional cases as cell capacities and charged state can differ too greatly. This is why the battery packs we deliver are selected.

Special notices for charging LiIo-/LiPo batteries from Graupner

• Since Graupner GmbH & Co. KG cannot supervise the correct charging and discharging of cells, the entire guarantee is void in cases of improper charging or discharging.

• Never leave batteries being charged unattended.

Safety notices

• Only approved chargers with appropriate charging cables may be used for charging LiIo-/LiPo batteries. Any manipulation to the charger or charger cables can lead to severe damage.

• The maximum charging capacity must be limited to 1.05 times the battery’s capacity.

Example: 700 mAh battery = 735 mAh max. charging capacity

• Use only the outlet-charger included with the set or a specially designed charger/discharger from Graupner to charge and discharge LiIo-/LiPo batteries, refer to page 17 or www.graupner.de.

• Ensure the settings for the number of cells or for ﬁnal charging voltage and ﬁnal discharge voltage are correct. Be sure to observe the operating instructions for your charger/discharger.

Other handling notices

• The battery to be charged must be placed on a non-combustible, heat resistant, non-conducting surface during the charging process. Combustible or readily ignited objects are to be kept away from the charging conﬁguration. Batteries may only be charged under supervision.

• LiIo-/LiPo batteries connected in series within a pack may only be charged as a group if the voltage of individual cells do not differ by more than

0.05 V. The LiIo battery included with the set is equipped with a special safety circuit such that “compensation” for voltage differences between individual cells, by way of an otherwise typical balancer plug connection, is not necessary.

• Under these conditions Graupner LiIo-/LiPo batteries can be charged with a maximum of 2 C (the value 1 C corresponds to the cell capacity) charging current. At a voltage of maximum 4.2 V per cell and above, charging must continue a constant voltage of 4.2 V per cell until charging current drops below 0.1 … 0.2 A.

• Charging voltage over 4.20 V per cell must be avoided absolutely as the cell would otherwise be permanently damage and could cause a ﬁre. In order to prevent the over-charging of individual cells in a pack, a cut-off voltage between 4.1 … 4.15 V per cell should be set to increase service life.

• Never attempt to charge battery cells with the wrong polarity. Abnormal chemical reactions take place when batteries are charged with reversed polarity and the battery will be useless. This can cause breaks, smoke and ﬂames.

• The permissible temperature range for charging and storing LiIo-/LiPo batteries is 0 … +50 °C.

Storage

LiIo-/LiPo cells should have a 10 … 20 % charge capacity when stored. If cell voltage drops below 3 V, then LiIo-/LiPo cells must absolutely be recharged to a capacity of 10 … 20 % of full capacity. Otherwise, further deep-discharging of the battery will make it useless during storage in a discharged state.

Special notices for discharging LiIo-/LiPo batteries from Graupner

• A continuous current rate of about 1 C does not represent a major problem for Graupner LiIo-/LiPo batteries. For larger currents, please follow the catalog speciﬁcations. In any case, observe the maximum current rating for the connector system, see maximum discharge current on the battery.

• Discharging below 2.5 V per cell damages cells permanently and is therefore to be avoided absolutely.

Short circuit conditions are to be avoided absolutely. Permanent short circuits lead to destruction of the battery, high temperatures and perhaps even self-ignition may follow.

• During discharge, battery temperature must not rise, in any case, to over +70 °C. Otherwise, better cooling or a lower rate of discharge must be in-

troduced. The temperature can easily be checked with the infrared thermometer, order no. 1963. The battery must never be discharged via the transmitter’s charging socket. This socket is not suitable for this purpose.

Other handling notices

• Never short-circuit the battery. A short-circuit allows very high current to ﬂow and this heats up the cells. This will lead to loss of electrolyte, the production of gases and perhaps even explosions. In the vicinity of, or while handling, Graupner LiIo-/ LiPo batteries, avoid electrically conducting surfaces because of the danger of creating a shortcircuit condition.

• Handling connectors

These connectors are not as robust as for other batteries. This applies particularly to the plus pole connector. The connections can easily be broken off. Due to thermal transfer, the connector tabs may not be soldered directly.

• Cell connection

Direct soldering on battery cells is not permitted. The heat of direct soldering can damage battery

components, such as separator or isolator. Battery connections should only be made by in-

dustrial spot welding. A professional repair made by the manufacturer or distributor is necessary to replace missing or torn-off cables.

• Replacing individual battery cells

The replacement of battery cells may only be made by the manufacturer or distributor and never by the user himself.

• Damaged cell usage

Damaged cells may never be used or returned to service.

Characteristics of damaged cells include: damaged housing packing, deformed battery cells, electrolyte or leaking electrolyte. In these cases,

further use of the battery is not permissible. Damaged or useless cells are hazardous waste

items and must be appropriately disposed.

General warning notices

• Batteries must never be put in ﬁre or burned.

• Battery cells must not be submerged in liquids, such as water, seawater or beverages. Any contact with liquids, of whatever nature, is to be avoided.

• Individual battery cells and batteries are not toys and must therefore not get into the hands of children. Batteries/cells must be kept out of the reach of children.

• Batteries must not get into the vicinity of babies or small children. If a battery is swallowed, immediately go to a doctor or emergency medical facility.

• Batteries must not be put in a microwave oven or put under pressure. Smoke, ﬁre and more can be the consequences.

• Never dismantle a LiIo-/LiPo battery. Dismantling a battery can cause internal short-circuits. Gas, ﬁre, explosions and other problems can result.

• The electrolyte and electrolytic vapors in LiIo-/LiPo batteries are harmful. Absolutely avoid all direct contact with electrolytes. If electrolytes come into contact with skin, eyes or other body parts, immediately wash out or rinse out with generous amounts of fresh water then be sure to consult a doctor.

• Batteries built into equipment must always be removed from that equipment when it is not currently in use. Always switch off equipment after it is used to prevent deep discharging. Always charge batteries before it is too late. Store batteries on a non-combustible, heat resistant, non-conducting surface! Deep-discharged LiIo-/LiPo batteries are defective and may no longer be used!

Notice for remote control set mc-16 HoTT and

mc- 2 0 HoTT

Order no. 33016 / 33020 These radio control sets are ﬁtted as standard with a

LiIo transmitter battery with integral protective circuit (changes reserved). Once the factory preset voltage limit of 3.60 V has been reached, a warning will appear in the display.

Disposal of used batteries

Some countries have laws requiring that all used batteries be turned over to an authorized collection center.

Disposing of batteries along with common household garbage is forbidden. Old batteries can be turned into communal collection centers for disposal at no charge or they can be returned to one of our dealerships or anywhere else where batteries of that given type are sold. Used batteries we have delivered can also be sent back to us, at your cost, through the mail. Use the return address below:

Graupner GmbH & Co. KG Service: Used batteries Henriettenstr. 94-96

D-73230 Kirchheim unter Teck This represents an essential contribution to environ-

mental protection.

Caution: Damaged batteries require among other things, special packaging, because they are very toxic!

9Safety notices

mc-16 and mc-20

The Newest Generation of Remote Control Technology

The technical advances across the entire spectrum of model building is an ever-present challenge to design engineers. This is why the introduction of new transmission technology in the 2.4 GHz band represents a new milestone.

The HoTT-System (Hopping Telemetry Transmission) developed by Graupner is a synthesis of know-how, engineering and testing done around the world by professional pilots.

Established Graupner HoTT techniques theoretically permit over 200 models to be operated at the same time. However, because of the interspersed radiofrequency utilization permitted by certiﬁcation for the

2.4 GHz ISM band, this number is signiﬁcantly lower in practical application. Nevertheless, in general more models can be operated simultaneously in the

2.4 GHz band than would be the case in conventional 35 or 40 MHz frequency bands. The real limiting factor is – as often before – is still likely to be the size of available operating space (i. e. airspace for aircraft). Alone the fact that it is no longer necessary to coordinate transmitting frequencies with other pilots in the vicinity (which is sometimes quite difﬁcult in broken landscapes, such as on hillside slopes) represents an enormous boost for remote control operating security.

Bidirectional communication between transmitter and receiver, by way of a return channel built into the receiver, permits convenient access to data and programming in the HoTT receiver. For example, this makes it possible to s wap receiver outputs or to divide up control functions among multiple servos (channel mapping). Servo travel and servo rotation directions in the receiver can also be matched to one another with these facilities. Telemetry data, like VARIO and GPS data, can be called up from optionally available modules.

mc-16 HoTT and m c- 20 HoTT radio control

The sets are based on the Graupner/JR mc-24 computer radio control system, which was introduced back in

1997. The new equipment has been specially developed for the advanced RC pilot. The transmitters of this series offer an unprecedented level of security and reliability combined with outstanding operating convenience and ease of use.

Both these HoTT systems can easily be used to operate all current model types, whether your preference is for ﬁxed-wing model aircraft or helicopters, model cars or boats.

For example, every HoTT transmitter is fully equipped in terms of software and hardware to allow the use of the renowned NAUTIC modules. A further innovation is the “channel sequencer” – available as standard only on the mc-

mc-16 HoTT and m c- 20

20 HoTT – which provides a means of automating

servo sequences involving up to three servos. However, it is ﬁxed-wing model aircraft and helicop-

ters in particular which call for complex mixed functions involving the control surfaces or swashplate control system. In this respect the latest computer technology makes it extremely simple to program the system to cope with a vast range of model requirements: simply select the appropriate model type in the program of your HoTT transmitter, and the software automatically sets up all the relevant mixing and coupling functions. Separate modules for implementing complex coupling functions are no longer required, and complicated mechanical mixers in the model are completely superﬂuous.

Additional ﬂight-phase-speciﬁc settings can be stored in every model memory location. For example, such settings can be made for various parameters that can be called up to implement particular ﬂight maneuvers at the “press of a button”. Additional model memories can be stored on the SD card, which is included standard with the set. Even telemetry data can be recorded for subsequent evaluation on a PC.

Since the plays, the lower display has been optimized for com-

mc- 2 0 HoTT is equipped with two dis-

prehensible, simple operation of the software. The graphic representation of mixer functions is particularly helpful. The upper display allows telemetry data to be called up from the receiver.

Functionally-related options are clearly arranged by content in a simple organization. The clear, comprehensible program structure permits a beginner to quickly become familiar with the various functions and able to use all options pertinent to his level of expertise with remote control models.

This handbook describes every menu in detail. There are tips, many notices and programming examples to supplement the descriptions and also explanations for model speciﬁc technical terms, like transmitter control, dual rate, butterﬂy, and so on.

Please observe the safety notices and technical notices. Read through the instructions attentively. Before usage, test all functions by simply attaching servos to the receiver included in the set. While doing this, observe respective notes on page 77. This will help you learn the essential operating techniques and functions of your HoTT transmitter.

Always handle your remote controlled model with a sense of responsibility so that you do not endanger yourself or others.

The Graupner team wishes you much pleasure and success with your HoTT transmitter system, the newest generation of remote control systems.

Kirchheim-Teck, November 2012

Foreword

mc-16 and mc-2 0 series computer systems

two remote control sets with 2,4-GHz-Graupner|SJ-HoTT technology (Hopping Telemetry Transmission)

• Integrated Graupner|SJ HoTT 2.4 GHz transmission system

• The high-speed primary processor is used for data transfer, ensuring ultra-fast response times.

• Maximum interference immunity made possible by optimized frequency hopping through as many as 75 channels and wider channel spread

• Intelligent data transfer with correction function

• Over 200 systems can be used simultaneously

• The HoTT technique of bidirectional communication between sender and receiver, as well as the fastest possible transmission rate (10 ms) assures extremely short reaction times.

• Modulation can be switched by software: when necessary, you can switch from “HoTT” to “EXT.” or “SP.” by pressing a button.

• Case incorporates integral patch aerial

• Transmitter features integral slot for SD and SDHC memory cards, formatted to FAT or FAT32, for saving log ﬁles, model programming data and supplementary functions such as transmitter ﬁrmware updates.

• Transmitter features alternative method of battery charging via the USB socket.

• 6 different languages (Dutch, English, French, German, Italian and Spanish) available per software update. For the availability of a given language, refer to the download area.

• Simpliﬁed arrangement of operating elements, such as joysticks, external switches, proportional controls and trim levers as control functions

• CONVENIENCE MODE SELECTOR to simplify changeovers between operating modes 1 … 4 (e. g. throttle left/throttle right)

• Extremely wide receiver operating voltage range of 3.6 V to 8.4 V (functional to 2.5 V)

• Fail-safe, free channel assignment (channel mapping), mixer functions and all servo settings are

Technology that enthralls. The superior functional security of Graupner/SJ

HoTT technology accomplished with bidirectional communications between transmitter and receiver with integrated telemetry, freely programmable voice output via headset connector, and ultra-fast response times.

Simpliﬁed programming using capacitive touchbuttons on the buttons on the mc-16 HoTT.

mc- 2 0 HoTT and four-way push-

The illustration shows the contents of the mc- 20 HoTT transmitter set.

High-contrast eight-line graphic screen provides a clear display of all set-up parameters. Switchable blue backlighting. The an independent second screen for displaying telemetry data. Storage of telemetry data on a micro SD memory card.

USB connection to read and write the model’s memories as well as for making ﬁrmware updates.

mc- 2 0 HoTT features

11Remote control set description

mc-16 and mc-2 0 series computer systems

two remote control sets with 2,4-GHz-Graupner|SJ-HoTT technology (Hopping Telemetry Transmission)

simple to program

• Swashplate limiting: This function limits the swashplate’s tilt angle to prevent the potential for mechanical collision in helicopter 3D operation at full-limit roll and pitch-axis

• Multi-channel function for operating Graupner product line NAUTIC modules

• Digital trimming, effective per speciﬁc ﬂight-phase

• C1 changeover, brake/elec. motor: This changeover can be implemented very easily via enhanced ﬂight phase programming. The pilot determines the joystick positions (forward/rear) at which the motor is to switched off or the airbrakes are to be retracted.

• Twelf freely programmable mixers for ﬁxed-wing or helicopter models, each with freely selectable input and output functions; four curve mixers with innovative 6-point curve technology for easy to set and adjust curve values at up to eight points for throttle, pitch, tail or other nonlinear characteristics. The arithmetic unit in the CPU employs an ingenious method of calculating polynomial approximations for truly-rounded, ideal MPC (multipoint curve) mixer curves.

• Curve mixer points can be offset in both axes using the four-way buttons.

• Up to seven ﬂight-phase programs can be individually adapted for each model and given a name. The switchover time is programmable separately.

• SUPER SERVO menu with a perfect overview of all servo setting data and simple parameter correction at four “levels”: direction of rotation, midpoint setting, separate servo travel on both sides and separate travel limiting on both sides for 8

mc-16 HoTT) respectively 12 servos (mc-20

( HoTT) with a total of 48 respectively 72 setting options.

• SUPER-DUAL-RATE, EXPO and EXPO/DUAL-

Remote control set description

RATE menu with 36 potential setting variants for three servo functions and up to seven ﬂight phases

• Servo display hot-key: from virtually any menu, pressing the  and  buttons of the left-hand four-way button takes you directly to the servo display

• Highly practical multi-function menus for ﬁxed-wing model aircraft and helicopters. Entering the number of aileron and ﬂap servos, or collective pitch servos, automatically sets up all the relevant mixer functions in the appropriate multi-function menu.

• Helicopter swashplate mixer for 1, 2, 3, or 4 point steering.

• Future-proof design: updatable, high-speed 32bit operating system with modern ﬂash memory, simple update capability via the USB port and the micro-SD card.

• Transmitters feature sockets for PC USB interface, earphone, SMART-BOX, DSC system as standard; they are prepared for Trainer mode operations

• ESC button switches the screen from the Main menu to the »Telemetry« menu and back.

• Comprehensive telemetry displays, programming and analysis functions directly on the transmitter screen

• Wired and wireless Trainer systems with total transfer; all settings are entered at the Teacher transmitter.

mc-16 HoTT

• 20 model memories with storage of all model-speciﬁc programming and set-up parameters

• Eight control functions as standard, can be expanded to twelve at extra cost

• MULTI-DATA GRAPHIC LCD monitor with blue backlighting for greatly improved legibility in difﬁcult lighting conditions.

• Function encoder with two four-way push-buttons

for simpliﬁed programming and accurate settings

• Key-Lock function guards against accidental operation

• Transmitter features two 3-position switches (SW 5/6 + SW 11/12), two side-mounted proportional controls (Lv1 + 2) and two proportional sliders (Sl1 + 2) as standard; controls can be assigned to any function

• Certain menu points can be unlocked as an extracost option; see Contents on pages 2 and 3 and the start of the relevant menu points

*  Standard option

 Option can be unlocked at extra cost

mc- 2 0 HoTT

• 24 model memories with storage of all model-speciﬁc programming and set-up parameters

• Maximum twelve control functions

• Two MULTI-DATA GRAPHIC LCD monitors with blue backlighting for improved legibility in difﬁcult lighting conditions

• A function encoder with two touch-sensitive, fourway keys („CAP Touch“) permit simpliﬁed programming and precise settings

• Twelve toggle switches (three 3-position switches (SW 2/3, 5/6 + 11/12), ﬁve 2-position switches (SW 4, 7, 9, 13 + 15), two centre-biased 2-position switches (SW 8 + 14), two 2-position locking switches (SW 1 + 10), two momentary switches on the rear of the transmitter (SW 16 + 17 / 18 +

19), two INC/DEC buttons (CTL 5 + 6), two sidemounted proportional controls (Lv1 + 2) and two proportional sliders (Sl1 + 2) installed as standard; controls can be assigned to any function

• Key-Lock function guards against accidental operation

• Voice and, as applicable also MP3 ﬁle, output over headset output or loudspeaker

• Ring-limiter: functions similar to swashplate limitation but is used for control of up to three VoithSchneider drives in ship models.

• Channel sequencer for automating servo motion sequences of up to three servos, e. g. to automate the lowering of landing gear or to extend/retract drives in self-launching gliders.

Model programs

• Model type icon: graphic model type indicator (ﬁxed-wing / helicopter)

• Transmitter operating hours timer

• Flight phase switch assignments: six switches, two with a priority function. Every switch combination can be named freely. This makes the number of ﬂight phases independent of the number of ﬂight phase switches.

• Tail type normal, V-tail, Delta/ﬂying-wing and 2 HR Sv 3+8 (which immediately makes two coupled elevator servos available without using free mixers or dual mixers)

• Flap count 4 AIL/4 FL: Full support of eight wing servos, even without use of free mixers (standard feature only on the twelve-channel transmitter; can be unlocked at extra cost on the

mc- 2 0 HoTT

mc-16 HoTT)

• Expanded transmitter control menu: single-sided centre offset facility. With the exception of the trims, all transmitter control elements can be assigned as transmitter controls. Option of assigning two switches to each input to act as a genuine three-stage function.

• Wing mixers: New concept for the multi-ﬂap menu to simplify settings of one to eight wing servos on a ﬂight-phase speciﬁc basis in a comprehensible manner without requiring the use of free mixers

• »Logical switches«: this function permits two switches to be coupled as »and« or »or« logic functions. The result can be employed as a virtual

switch. Typical application: The activation of certain functions should only be possible in conjunction with other functions, e. g. wheel brake can only be activated when the landing gear is down. A number of functions which are normally independent of one another, are to be put in their base settings by way of an »Emergency switch«. This program automation can be activated by multiple switches that also select the appropriate program. (Standard only on the

mc- 2 0 HoTT, optional on the

mc-16 HoTT.)

• Flight phase switching cutoff delay: the delay time can be switched off for individual channels on a ﬂight-phase basis (e. g. for motor off in electric models or to activate/deactivate helicopter head lock). (Standard only on the tional on the mc-16 HoTT.)

• Expanded servo centre adjustment range: now +/-125 %

• Number of ﬂight phases: ﬁxed-wing: 7, helicopter: 6 + AR

• Phase trim available on all axes of ﬁxed-wing models

• Servo assignments can be swapped at the receiver output

• Additional functions planned; implementation via software update.

General HoTT features

• Simple, extremely fast binding for each model

• Ultra-fast re-binding even at maximum range

• Any number of receivers can be bound to provide additional channels (max. 32 channels)

• Range: test and warning function

• Low-voltage warning

• GR-16 and GR-24 receivers used in SAME mode can simultaneously address a maximum of four servos as a block, with a frame rate of 10 ms (digital servos only!)

mc- 2 0 HoTT, op-

• Thanks to cycle time reduced down to as little as 10 ms, extremely short response times are achieved.

• Real-time telemetry analysis on the transmitter screen. As an option, telemetry data can also be displayed on the SMART-BOX.

• Selectable cycle time: 10 ms or 20 ms/30 ms, depending on receiver and operating mode

• Channel mapping in the receiver allows free distribution of control functions.

The travel distance and rotation direction settings integrated into the receiver make it possible, for example, to match up mapped servos with one another.

• The programmable fail-safe functions »Hold«, »Off« and »Move to preset positions« that are built into the receiver for every individual servo channel can be set separately.

13Remote control set description

mc-16 and mc-2 0 series computer systems

two remote control sets with 2,4-GHz-Graupner|SJ-HoTT technology (Hopping Telemetry Transmission)

The Order No. 33016 set includes

• Microcomputer transmitter with built-in LiIo transmitter battery 1s4p/4000 mAh/3.7 V and two 3-position switches, two proportional sliders on the centre console and two side-mounted proportional rotary controls (change reserved)

• plug-in charger (4.2 V, 500 mA)

• Short and long stick-tops (Order No. 33000.2 and 33000.3)

• bidirectional receiver Graupner|SJ GR-16 HoTT (order no. 33508) for connection of up to 8 servos

• USB adapter/interface (order no. 7186.6) including suitable USB cable for connection to a PC and an adapter cable for receiver updates

• Micro-SD card (4 GB) with an adapter for a card reader

Replacement parts

Order No. Description 3080 Aluminum transmitter case, HoTT,

400 x 300 x 150 mm

33000.1 Transmitter battery, ﬂat LiIo, single cell six-

pack/6000 mAh 3.7 V TX

33002.1

33012.2 Transmitter metal hanger for

Micro-SD card, 4 GB for HoTT transmitter

mc-16 HoTT

mc-16 and

mc- 2 0 HoTT

33012.3 Hand rests for the transmitters

and mc- 2 0 HoTT (2 piece)

Remote control set description

mc-16

The Order No. 33020 set includes

• Microcomputer transmitter HoTT with built-in LiIo transmitter battery 1s6p/6000 mAh/3.7 V and twelve toggle switches (three 3-position switches, ﬁve 2-position switches, two centre-biased 2-position switches and two 2-position locking switches), two momentary switches on the back of the transmitter, two INC/ DEC buttons (CTL 5 + 6) plus two side-mounted proportional rotary controls and two proportional sliders (speciﬁcation reserved)

• plug-in charger (4.2 V, 500 mA)

• Short and long stick-tops (Order No. 33000.2 and 33000.3)

• bidirectional receiver Graupner|SJ GR-24 HoTT (order no. 33512) for connection of up to 12 servos

• USB adapter/interface (order no. 7186.6) including suitable USB cable for connection to a PC and an adapter cable for receiver updates

• Micro-SD card (4 GB) with an adapter for a card reader

• Metal hanger for transmitter straps

• Transmitter strap

• Hand rests

• Aluminum transmitter case

mc- 2 0

Accessories

Order No. Description

71.26 Transmitter straps, Graupner|SJ HoTT

72.40 Transmitter straps, deluxe

Teacher/pupil cable for the transmitters

Other accessories in Internet at www.graupner.de. Contact or visit your local dealer. He will be glad to provide advice.

mc-16 HoTT and m c- 20 HoTT, see

page 225

Technical data

mc-16 HoTT and m c- 20 HoTT transmitter

Frequency band 2.4 … 2.4835 GHz Modulation FHSS Region EURO or FRANCE,

see page 272

Control functions

mc-16 HoTT:

8 functions, 4 of these can be trimmed, can be expanded to 12 functions at extra cost

mc- 2 0 HoTT:

12 functions, 4 of these can

be trimmed Temperature range -10 … +55 °C Antenna Integral patch aerial inside

case Operating voltage 3.2 … 4.8 V Current draw about 400 mA Range up to about 4 000 m Dimensions about 235 x 228 x 66 mm

(without hand rests) Weight about 1200 g with transmitter

battery, without accessorys

GR-16 HoTT receiver

order no. 33508 Operating voltage 3.6 … 8.4 V* Current draw about 70 mA Frequency band 2.4 … 2.4835 GHz Modulation FHSS Antenna 2 diversity antennas, about

145 mm long, about 115 mm of this length encapsulated

and about 30 mm active Plug-in servos 8 Sensor sockets 1 Temperature range -10 … +55 °C Dimensions about 46 x 21 x 14 mm Weight about 12 g

GR-24 HoTT receiver

order no. 33512 Operating voltage 3.6 … 8.4 V* Current draw about 70 mA Frequency band 2.4 … 2.4835 GHz Modulation FHSS Antenna 2 diversity antennas, about

145 mm long, about 115 mm of this length encapsulated

and about 30 mm active Plug-in servos 12 Sensor sockets 1 Temperature range -10 … +55 °C Dimensions about 46 x 31 x 14 mm Weight about 16 g

* The speciﬁcation for permissible operating voltage range applies

only to the receiver. Please note in this context that receiver input voltage is applied without regulation to connected servos but the voltage range for most connectible servos (speed controls, gyros, etc.) is only 4.8 to 6 V

15Remote control set description

General operating notices

mc-16 HoTT and mc-2 0 HoTT transmitters

Transmitter power supply

mc-16 HoTT and m c- 20 HoTT transmitters are

ﬁtted as standard with rechargeable Lithium-Ion batteries differing in capacity. (Change reserved.)

However, the standard built-in battery is not charged upon delivery of the transmitter.

When the transmitter is used, its battery voltage should be monitored by way of the indicators provided in the LCD display. If battery voltage drops below the adjustable voltage setting (set via item “Batterie warning” in the “Basic Settings” menu, page 272,), default value 3,60 V, an audible warning signal will sound and the message window shown below will appear in the screen

Stp

#01

3.5V

0:22h

No later than now, operation must be terminated so the battery can be charged again.

Notice: Be sure that the correct battery type is set in the “Basic Settings” menu, page 272! “Lith” must be

set as standard.

The transmitter’s rechargeable LiIo battery can be charged by way of the charger socket located behind a cover on the left, front side of the transmitter – as viewed from the front – with the included plug-in charger (order no. 32032.4), see page 22.

Batt. must be re charged!!

0 00

Charging the transmitter battery using the plugtype charger

With the plug-type charger (4.2 V / 500 mA) included in the set the charge time for the transmitter battery is up to about ﬁfteen hours, depending on the pack’s initial state of charge.

Never use any other type or make of plug-type charger, nor a charger designed for other types of battery. There is a risk of excessive output voltage and incorrect connector polarity (see below), either of which can result in very serious damage. We recommend that you label the standard charger to avoid confusion. Please read the Safety Notes on pages 8 …

9. The transmitter must be switched “OFF” during the

entire charging procedure. Never switch on the transmitter when it is connected to the charger. Even a brief interruption to charging can cause charging voltage to rise to a level that will immediately damage the transmitter with over-voltage. Also for this reason, be sure all connectors are always plugged in securely and have good contact.

Charging the transmitter battery via the USB socket

The transmitter is supplied ﬁtted with a genuine Graupner/SJ transmitter battery with integral protective circuit, Order No. 33000.1, which can also be charged via the USB port of the and mc- 2 0 HoTT transmitter at the usual current available at USB ports; see “mini-USB socket” on page 25.

C A U T I O N: charging a battery without integral protective circuit via the USB socket incurs a serious risk of ﬁre!

mc-16 HoTT

Charging with automatic chargers

To achieve quicker recharging of the single cell LiIo battery, Graupner automatic chargers can also be used. The table below shows a selection of these chargers.

Recommended chargers (accessory)

suitable for

battery types

Order No. Designation

6411 6463 6464 6466 6468 6469 6470 6475 6478 6480

Charger cable, order no. 3022 is additionally needed for the transmitter and charger cable, order no. 3021 is additionally needed for the receiver.

Other charger units and details about the listed chargers can be found in the Graupner RC main catalog or in Internet at www.graupner.de.

The charger socket is equipped standard with a diode to protect against reversed polarity. Original Graupner automatic chargers also detect battery voltage polarity.

Observe the conﬁguration notices for the charger used.

Ultramat 8 x x x x x Ultramat 12 plus x x x x x x Ultramat 14 plus x x x x x x x Ultra Trio plus 14 x x x x x x x Ultramat 16S x x x x x x x Ultra Trio Plus 16 x x x x x x Ultramat 18 x x x x x x x Ultra Duo Plus 45 x x x x x x x Ultra Duo Plus 60 x x x x x x x

Ultra Duo Plus 80 x x x x x x x

Input voltage 220 V

Input voltage 12 V

NiCd

NiMH

LiPo/LiIo

lead battery

integr. balancer

General operating notices

First connect the charger cable’s banana plugs to the charger and only then connect the cable’s other end into the charging jack on the transmitter. Never allow the bare ends of the banana plugs to come into contact with one another when the other end of the cable is plugged into the transmitter.

Charging current may not exceed 1.5 A as otherwise the diode, and perhaps other components, could be damaged. If necessary, limit the current at the charger.

mc- charging jack polarity

The charger cables on the market from other manufacturers often have different polarities. Therefore use only an original Graupner charger cable, order no.

3022.

Removing the transmitter’s battery

To remove the transmitter battery locate the cover of the battery compartment in the back of the transmitter and slide it off in the direction of the arrow:

Battery connector

nect the transmitter battery’s connector by carefully pulling on the supply line cable.

(The photo shows the battery of the transmitter.)

Inserting the transmitter’s battery

The battery connector is protected against a reverse polarity connection by two slanted edges, see illustration. When correctly plugged in, the unconnected pin of the connector is at the bottom, as shown in the illustration. The plus pole (red lead) is in the middle and the minus pole (brown or black lead) is toward the antenna side.

Never try to force the connector onto its circuit-board socket.

Place the battery into its compartment and close the transmitter’s cover.

Battery operation timer at the bottom left of the screen

This timer shows the transmitter’s cumulative operating time since the transmitter’s battery was last charged.

This timer is automatically reset to “0:00” when the transmitter is switched on and its battery voltage is signiﬁcantly higher than when the transmitter was last used, e. g. because the battery was charged.

Stp

#01

4.1V

0:00h

Flt

mc- 2 0 HoTT

Transmitter connector polarity

0:00 0:00

HoTT

0.0V

General charging notices

• The charging instructions for the charger as well

as for the battery from its manufacturer to be observed.

• Pay attention to the maximum permissible charg-

ing current speciﬁed by the battery’s manufacturer. In order to prevent damage to the transmitter, charging current should never exceed 1 A. If necessary, limit the current at the charger.

• If the transmitter battery is nevertheless to be

charged at a current rate in excess of 1 A, then it is imperative that this is done outside the transmitter. Otherwise there is a risk of damage to the transmitter’s board due to overloading its printed circuit paths and/or overheating of the battery.

• If an automatic charger is to be used for charg-

ing, perform several test charging procedures to ensure the ﬂawless functionality of its automatic shut-off. This applies particularly if you want to charge the standard installed Lithium battery with an automatic charger unit. You may need to alter the charger’s cut-off behaviour if the charger you are using offers this option.

• Do not execute a battery discharge or battery

maintenance program through the charger jack. The charger jack is not suitable for this purpose.

• Always connect the charger cable to the charger

ﬁrst and then to the receiver or transmitter battery. This avoids the possibility of shorting the bare banana plug ends together.

• If the battery heats up signiﬁcantly, check the bat-

tery’s condition, replace the battery or reduce the charging current.

• Never leave a charging battery unattended.

• Follow the safety notices and handling instruc-

tions provided on page 8.

Lift one side of the battery and withdraw it from the hook-and-loop tape without using force. Then discon-

17General operating notices

Opening the transmitter housing

Carefully read the notices below before opening the transmitter housing. It may be better if unexperienced users ask a Graupner Service location to take care of the procedures described below.

The transmitter should only be opened in the following situations:

• to convert a neutralized joystick to a non-neutralized joystick or a non-neutralized joystick to a neutralized joystick.

• to adjust joystick return tension.

Switch off the transmitter before opening its cover. Open the battery compartment as described on

the previous double-page. If the handrests are ﬁtted, undo the three lower retaining screws of the six screws in each handrest.

Now undo the ﬁve recessed screws in the back of the transmitter and the battery well using a PH1-size cross-point screwdriver; see illustration:

side.

Important notices:

• Ensure that the shorter screw – in the battery well – does not fall inside the transmitter.

• Make no modiﬁcations of any kind to the circuitry as this will void the guarantee as well as the unit‘s ofﬁcial permit.

This applies in particular to the switches installed on both sides of the front screen. If you wish to change the arrangement, contact your nearest Graupner Service Centre.

• Be sure not to touch the circuit boards with any metallic objects. Do not touch contacts with your ﬁngers.

• Never switch the transmitter on when its housing is open.

When you close the transmitter again, be sure that …

• … no cables are caught between housing edges when the backplate is put into position.

• … both housing parts are properly seated with one another before screwing them together. Never force the housing sections together.

• Turn the screws down into the existing housing threads without stripping them out.

• … ﬁt the shorter of the ﬁve screws in the battery compartment again.

• … reconnect the battery.

• … re-install the handrests if you wish.

Lithium battery CR 2032

When you remove the transmitter back panel, you will see the holder for a CR 2032 battery on the circuit board below the aerial base, slightly left of centre:

Lithium battery

This battery maintains the date and time settings during a transmitter power supply outage, for example when the transmitter’s main battery is being replaced.

Note that the screw-holes are inclined slightly to the rear, so the cross-point screwdriver should be applied at the corresponding angle.

Hold the two housing sections together by hand then turn the transmitter upright over a suitable surface so these 5 screws can fall out without getting lost. Now lift up on the backplate carefully and place it to one

General operating notices

Stick conversions Neutralization

Both the left and the right joystick can be conﬁgured for neutralized or non-neutralized operation. Open the transmitter.

To change the joystick’s factory setting, locate the screw shown in the ﬁgure below enclosed in a white circle.

Note: The aggregate for the right joystick is a mirror image of the left joystick so the corresponding screw for the right joystick is on the right side just below the middle.

Brake spring and ratchet

The outboard screw of the two marked in the next ﬁgure adjusts the braking force and the inboard screw adjusts the strength of the ratchet for the respective joystick:

Note: The aggregate for the right joystick is a mirror image of the left joystick so corresponding screws for the right joystick are located at the top left.

Joystick restoring force

The joystick’s restoring force can also be adjusted to the pilot’s preference. The adjustment is located next to the return springs, see markings in the ﬁgure below.

Spring force for the given direction of motion can be adjusted by turning the respective screw with a Phillips screwdriver.

• clockwise = stronger return,

• counter-clockwise = weaker return.

vertical

horizontal

Now turn this screw down until the respective joystick is free to move from limit to limit – or turn the screw out until the joystick again completely self-restoring.

Note: The aggregate for the right joystick is a mirror image of the left joystick so corresponding screws for the right joystick are located to the right of the middle.

19General operating notices

Stick length adjustment

The length of both joysticks can be continuously adjusted to adapt these transmitter controls to the pilot’s preference.

Hold the lower half of the knurled grip in place then turn the upper section to release its counter-locked threads:

Now pull up or push down on the joystick’s end to the desired length. When the length is suitable, tighten the counter-locked threads of the upper and lower sections again.

The procedure is the same if you wish to replace the short stick-tops with the longer ones also supplied in the set.

Transmitter neckstrap support bars

As standard the

mc- 2 0 HoTT transmitter set in-

cludes a strong support system for the attachment of a neckstrap. The mc-16 HoTT transmitter can be retro-ﬁtted with the transmitter support system, Order No. 33012.2, at any time.

The support bars are inserted in the sockets in the transmitter case, and locked in place. After the transmitter has been used, they can be removed again in similar fashion:

ﬁrst press, then turn

The support bars are installed as follows: push one of the bars into the socket in the transmitter case, angled towards the centre of the transmitter as shown above. Now ensure that the retaining pin attached to the bar is in line with the slot in the socket, and press the bar against the spring in the direction of the transmitter for a distance of about one centimetre. At the same time fold the bar outwards (do not use force) in order to lock it in place. Install the second support bar in the same manner.

To remove the support bars ﬁrst unlock one of the bars by lightly pressing it inwards, and then fold it towards the centre of the transmitter. As soon as the retaining pin is free, you can withdraw the support bar from its guide. Repeat the procedure with the second support bar.

The following straps are available as accessories:

Order no. Description

71.26 Transmitter straps, Graupner/SJ HoTT

72.40 Transmitter straps, deluxe

General operating notices

Transmitter description

Front side

(The illustration shows the mc- 20 HoTT transmitter.)

Integral aerial inside case

Connector sockets

on the face side, protected by a cover, see beginning page 22

LC Display (more details available on page 28.)

ON/OFF switch (ON/OFF with LED display)

Hold the ON/OFF switch pressed in for about one second to switch the transmitter on. Hold it pressed in for about three seconds to switch off.

Option wells for switches and buttons: The following are ﬁtted as standard:

mc-16 HoTT: 2 three-position switches mc- 2 0 HoTT: 12 switches of various type and 2

INC/DEC buttons

Function module

rotary control: left side “Lv1”, right side “Lv2”

Function module

two sliders “Sl1” and “Sl2”

Digital trim

For the ﬁne-tuning of servo positions (travel neutralization). Each click produces an increment of adjustment (position indicator in display). The trim increment can be selected in the »Stick settings« menu.

left four-way button:

ESC = select/conﬁrm ESC touched for about 1 s: Changeover between

telemetry menu and basic display

= scroll in one of the four directions with every

tap (, , , ) simultaneous horizontal tap () = changeover between basic display and servo

display

simultaneous vertical tap of the left

() keys + "SET" of the right fourway button = changeover to the "secret options", see page 34.

Loud speaker

mc-2 0

LC Display (more details available on page 28.) Contrast adjustment in the »General settings« menu; see page 271.

Warning indicators:

• for underrun of preset battery voltage threshold

• for fault function of the teacher/pupil system

• C1 joystick too far toward full throttle when transmitter is switched on

• …

LED indicators

BATTERY: illuminates when voltage is sufﬁcient RF: illuminates during RF radiation WARNING: blinks, for example, when "Throttle too

high", "no pupil signal", "Transmitter battery voltage too low", …

Joystick

Two joysticks for a total of four independent control functions. The length of the joysticks can be adjusted. The correlation of control functions 1 … 4 can be set on a model type basis by way of the »Basic settings, model« menu, e. g. throttle left or right. The throttle joystick can be converted from neutralizing to non-neutralizing, see page 19.

touch sensitive keys, left and right

right four-way button:

SET = select/conﬁrm

= scroll or change value with every touch of one

of the four direction symbols (, , , )

Circle with the ﬁnger around the circumference = scroll/change values. Alternative values selec-

tion with the left four-way button (, , , )

simultaneous tap on  or  = CLEAR

Transmitter description - Front side

Face-side connections

Charger socket

(The illustration shows the mc- 20 HoTT transmitter.) The left-hand side ﬂap provides access to the charge

socket of the transmitter:

Maximum permissible charging current with Graupner automatic chargers: 1,5 A.

Never use plug-in chargers from other manufacturers or chargers intended for other battery types. Charger output voltage which is too high or possibly even different plug polarity, see further below, can cause immense damage.

More information about charging the transmitter’s battery can be found on page 16. Observe the safety notices beginning on page 8 when handling lithium batteries.

Transmitter description - Face-side connections

mc-16 HoTT and m c- 20 HoTT

DSC jack

The acronym “DSC” is a carryover which stands for the original “Direct Servo Control” function. However, in HoTT systems the “direct servo control” function is no longer available via a diagnose cable due to technical reasons.

Once the left-hand side ﬂap has been moved away, the DSC socket is accessible:

The two-pole DSC socket ﬁtted as standard to mc-

16 HoTT and mc-2 0 HoTT transmitters serves

both as Trainer socket (Teacher and Pupil) and also as interface for ﬂight simulators and external RF modules.

To ensure a proper DSC connection, please observe:

1. Make any necessary menu changes. Refer to the section beginning on page 222 to

adapt the transmitter to a teacher/pupil system.

2. When operating a ﬂight simulator or when operating the transmitter as a pupil transmitter, ALWAYS switch OFF the transmitter as only in this position does the transmitter‘s RF module remain inactive after the DSC cable is inserted. This also reduces the transmitter‘s power consumption somewhat.

Only the red “ constantly illuminated and the transmitter’s ba-

Battery

” LED should remain

sic display should show the character string “DSC” below the operating time clock. At this time, the display of telemetry data and symbols will be suppressed.

ELEVE

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The transmitter’s upper display will show the message “CANNOT RECEIVE DATA” during this time.

Thus the transmitter is ready for operation. In contrast, the transmitter in teacher mode is to

be switched on prior to plugging in the respective cable.

3. Connect the other end of the cable to the desired unit in compliance with the given operating instructions for that unit.

Important: Pay attention that all plugs are inserted se-

curely into their respective sockets and use only the prescribed 2-pole TRS connector plugs on the DSC-side.

4. In the line „DSC Output“ in the »Basic settings, model«, page 92 or 100, – depending on the

number of functions transferred – one of the following modes can be set: PPM10, PPM16, PPM18 or PPM24. Default setting: PPM10.

Notice about ﬂight simulators: Because of the myriad of ﬂight simulators available on the market, it may be necessary to have the contact layout of the audio plug or DSC module appropriately modiﬁed by Graupner Service.

Stp Flt DSC

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HoTT

Data jack

Headset connector

The left-hand side ﬂap provides access to the DATA socket of the transmitter:

This jack is intended for connection of the optional Smart-Box, order no. 33700.

Details about the Smart-Box can be found with the given product in the Graupner RC main catalog or in Internet at www.graupner.de.

However, the Data socket can also be used to connect external RF modules made by other manufacturers; see “EXT.” and “SP.” in the “Module” section of the “Basic model settings” menu on pages 88 and

96.

mc-16 HoTT and m c- 20 HoTT

Once the right face-side cover has been moved away, the transmitter’s headset connector is accessible:

The jack is intended for connecting conventional earplugs or a headset by way of a 3.5 mm TRS plug. (not included in the set) An appropriate symbol will appear in the basic display when a headset is connected:

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The transmitter’s acoustic signals as well as those signals associated with the telemetry menu are output via this connection. These announcements are made in German language by default. More about this can be found under “Voice output” in the section »SECRET MODE« beginning on page 34 and »Telemetry« beginning on page 240.

The volume of signals and voice output sent to the headset can be adjusted individually in the lines “Voice volume”, “Vario volume”, and “Beeps volume” of the »General basic settings« menu, page 268.

Flt

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5.5V

23Transmitter description - Face-side connections

Card slot

micro SD and micro SDHC The transmitter’s card slot for type micro-SD and

micro-SDHC memory cards becomes accessible once the right face-side cover has been turned away.

Although a memory card is supplied as standard, the slot also accepts any standard commercial micro-SD memory cards of up to 2 GB capacity and microSDHC cards of up to 32 GB capacity. However, as a manufacturer we recommend the use of memory cards no larger than 4 GB as this is completely adequate for all normal situations.

The type of memory card to be used in the transmitter is that known in conjunction with digital cameras and cell phones. It is to be pushed into the slot, contacts up, until it latches, see photos above. Once the memory card has been inserted, the transmitter’s cover ﬂap can be closed again.

If the standard memory card is inserted – or another card which has already been inserted in the transmitter at least once – then the card is immediately ready for use when the transmitter is switched on. When the transmitter is switched on again after inserting such a card, the stylised memory card icon appears in the base display:

Transmitter description - Face-side connections

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If the card has not previously been inserted, the transmitter ﬁrst creates a number of folders on it; this is indicated in the transmitter’s base display by a card symbol which slowly ﬁlls from left to right. The memory card is ready for use as soon as this animation ceases.

You can remove the prepared memory card from the transmitter when required, and insert it in a suitable card reader. Connect the reader to your PC or laptop, and copy the ﬁles – previously downloaded from the Download page for your transmitter – into the appropriate folder. Now remove the memory card from your card reader and insert it in the transmitter once more.

Removing the memory card

Press the SD or SDHC card a bit further into the card slot to release the slot’s latch then pull out the memory card.

Data acquisition / storage

The storage of data on the SD card is coupled to the ﬂight timer. If this timer is started – when a suitable memory card is inserted in the card slot and a telemetry link to the receiver exists – data acquisition is also started. Data acquisition will stop again when the ﬂight timer is stopped. The ﬂight timer is started and stopped as described in the section »Timers (gen- eral)” on page 162.

The amount of data written on the memory card is presented as a black bar graph ( from left to right as data ﬁlls the memory card .

After a data acquisition session is ﬁnished, there will be an (empty) folder “Models” and a “LogData” folder

Flt

0:00 0:00

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5.5V

) which grows

on the memory card. Within the “LogData” folder there will be log ﬁles, that are designated with names in the format 0001_year-month-day.bin, 0002_year-monthday.bin, etc., in sub-folders named “model name”. If a model memory is still “unnamed” the respective log ﬁles can be found in a sub-folder designated “NoName” when the memory card is removed from the transmitter and inserted into the card slot of a PC or laptop. There is a PC program available on the transmitter’s download web page at www.graupner.de with which the stored data can be evaluated on a compatible PC.

Importing voice ﬁles

As mentioned in section “Headsets”, here at the right, the transmitter’s acoustic signals as well as those signals and announcements associated with the »Telemetry« menu can be output by way of the headset connector. These announcements are made in German language by default. These announcements are summarized in a voice packet which is stored in a transmitter-internal memory but can be replaced by a voice packet of a different language at any time. More information about this can be found in the section »SECRET MODE« beginning on page 34.

Transmitter ﬁrmware updates

The transmitter ﬁrmware can be updated and – if necessary – replaced at this menu point, using the procedure described in the previous section entitled “Importing voice ﬁles”; the screen language can also be changed here. For more details of this please refer to the section entitled “SECRET MODE” which starts on page 34.

Updates and more information can be found on the product page for your speciﬁc HoTT transmitter; see the Download section at www.graupner.de.

Important notes:

• No claim can be considered unless a log ﬁle is present; see left under “Data recording / stor-

Mini-USB connector

ing”.

• For the same reason the transmitter must always be updated to the latest software status.

• It is essential that you register at https://www. graupner.de/en/service/product_registration. aspx to ensure that you are constantly informed of important software updates. This is the only means by which we can automatically keep you aware of new updates by e-mail.

Importing/exporting model memories

Any model memory can be stored to an inserted memory card or from an inserted card into the transmitter. This feature is intended to support data exchange between identical transmitters or even use as data backup. More information about this can be found in the section »Copy / Erase« beginning on page 80.

Notes:

• Some special symbols that can be used in model names are subject to speciﬁc restrictions associated with the FAT or FAT32 ﬁle system used by the memory cards and these special symbols will be replaced during the copy process with a tilde (~).

• In principle the model memories of the mx-20 and

mc- 2 0 transmitters are compatible, BUT:

If you wish to carry out an “Import from SD card” in the other transmitter you must ﬁrst copy or move the appropriate model memory to the appropriate folder on a PC. For example: from \\Models\mc-20 to \\Models\mx-20, or vice versa.

See page 82 for more information on “Import from SD card”.

C A U T I O N :

After you have carried out an “Import from SD card” it is absolutely essential to check all the model functions with great care. Note also that the transmitter control and switch functions may need to be adjusted to suit the new transmitter.

The right-hand side ﬂap of mc-16 HoTT and mc-

20 HoTT transmitters provides access to the soft-

ware update socket, which is also used for altering the date and time via a PC using the Windows XP, Vista or 7 operating system; this socket is located on the right-hand side under the ﬂap:

The USB cable, order no. 32032, which is included with the set is to be connected to this jack. The procedure for carrying out a software update via a PC is described on page 50.

The PC software required, as well as the suitable USB driver, can be found on the download page for the given product on the Graupner website at www.graupner.de.

Once the necessary driver and software is installed on the PC, this USB connection can be used to update the transmitter or even just to set the transmitter’s date and time. To set the transmitter’s date and time by way of this jack, refer to the »Info display« menu, beginning page 278.

Note:

mc-16 HoTT and m c- 20 HoTT transmitters can

also be charged using this USB socket at the standard currents present at USB ports; see page 16.

25Transmitter description - Face-side connections

Bottom side transmitter interior

(The illustration shows the mc- 20 HoTT transmitter.)

Lithium battery CR2032 (not rechargeable) Independent backup for the transmitter's date

and time settings, see »Info display« menu on page 278.

Sockets for optional transmitter controls and switches

(In principle you can connect the switches in any order, but we strongly recommend that you maintain the same sequence as the case legends to avoid confusion.)

Socket for optional Bluetooth module

Order No. 33002.5

RF modul

SW16/PB18 (when transmitter is closed), see “Physical control, switch and control

switch assignments” on page 68

Transmitter battery plug

For charging the battery and a list of suitable automatic chargers, see page 16

Transmitter description - Bottom side transmitter interior

SW17/PB19 (when transmitter is closed),

see “Physical control, switch and control switch assignments” on page 68

Notes: Disconnect the transmitter battery at its connector when performing any type of work inside the transmitter. Never allow solder points to come into contact with objects as this can create short circuit conditions.

All jacks and plugs not described are to be left unconnected.

27For your notes

Display and keypad

(The illustration shows the control pad of the mc- 20 HoTT transmitter.)

left four-way button:

ESC = select/conﬁrm ESC touched for about 1 s: Changeover between

telemetry menu and basic display

= scroll in one of the four directions with every

tap (, , , ) simultaneous horizontal tap () = changeover between basic display and servo

display

simultaneous vertical tap of the left

() keys + "SET" of the right fourway button = changeover to the "secret options", see page 34.

Flight phase name

see menu »Phase settings«, page 152 or 156

Model memory location

mc-16: 1 … 20 mc- 2 0 : 1 … 24

Model type indicator winged model, helicopter

Model name

pupil

signal!

Throttle

too

high!

Batt. must

be re-

charged!!

Fail Safe

setup

A selection of potential warnings and notices. More about this on

page 33.

Stopwatch in min:s

micro-SD card inserted

(upward/downward)

Flight timer in min:s

Flight phase timer display, if available; see “Flight phase timers”, page 166.

t.b.d.

Transmitter battery voltage with dynamic bar indicator. If the lithium battery voltage underruns the 3.60 V (adjustable) threshold a warning message will appear and an acoustic warning will sound. (Switchover for NiMH batteries.)

Transmitter operating time. This will automatically be reset to zero after a charging process.

Display diagram for all four digital trim levers with numeric indicator and direction indicator

Transmitter description - Display and keypad

M = Model operation P = Pupil (pupil transmitter)

Signal strength

Operating mode

Receiver battery voltage RX-SPG

right four-way button:

SET = select/conﬁrm

= scroll or change value with every touch of one

of the four direction symbols (, , , )

Circle with the ﬁnger around the circumference = scroll/change values. Alternative values selec-

tion with the left four-way button (, , , )

simultaneous tap on  or  = CLEAR

Operating the “data terminal“

Entry keys ESC and SET

Display symbols

Displayed telemetry symbols

the active model memory has not yet been

“bound” to a HoTT receiver. More about the “Binding” process can be found on page 87 or 95.

Switched off on RF transmitter side

blinking antenna symbol: The last receiver bound to the active model is inactive or out of range

>M x no telemetry signal to receive

signal strength indicator of the connection to

the model

signal strength indicator of the connection to

the pupil transmitter in the display of the teacher transmitter for wireless teacher/pupil operation

Keys left of the display

• ESC key each brief tap on the ESC key will cause a step-

wise return in function selection or even further to the base screen. Any changes made to settings remain.

Momentarily touching the ESC key for about 1 s while in the base screen will open and close the »Telemetry« menu.

• Selection keys  

1. A tap on one of these keys will scroll, appropri-

ate for the given arrow direction, through lists, such as through the model selection list or the multi-function list or within menus though the menu‘s lines.

2. A brief simultaneous tap on the  keys will

cause a switch from the transmitters base screen, as well as from almost any menu position, into the »Servo display« menu.

Keys to the right of the display

• SET key

1. After switching the transmitter on, a brief tap

2. Within menus having settings, activate / deacti-

• Selection keys  

1. “Leaﬁng through” the multi-function menu, and

2. Select or set parameters in setting ﬁelds af-

3. A brief simultaneous tap on the  or 

Notes:

• In contrast to the four-way buttons of the HoTT transmitter, which are “pressed” in the same way as micro-switches, the touch-sensitive CapTouch buttons of the mc-2 0 HoTT respond to the lightest of touches.

• Touching the given four-way button does not itself initiate the given action but rather the end of the touch.

• In the event the four-way buttons do not exhibit any functionality immediately after switching the transmitter off and then on again right away, this is not a fault. Just switch the transmitter off again

on the SET key will cause a jump from the displayed base screen to the Multi-function menu. In the same manner, a selected menu can now be called up with the SET key.

vate (conﬁrm) the given setting ﬁelds with a tap on the SET key.

the menu lines within the set-up menus, in the same manner as the Select buttons of the lefthand four-way button, or – on the transmitter – in the same manner as “circling” over the four Select buttons.

ter their activation with a tap on the SET key, whereby the  and  keys will have the same given function. In this case it is completely irrelevant which of these two keys are used.

keys will set a changed parameter value in the entry ﬁeld back to its default value (CLEAR).

mc- 2 0

mc-16

then wait for several seconds before switching it on again.

29Transmitter description - Operating the “data terminal“

Shortcuts

The following key combinations can be used to directly call up certain menus and options:

• CLEAR A brief simultaneous tap on the  or  keys

of the right four-way button will reset a changed para meter value in the active entry ﬁeld back to its default value.

• »Servo display« A brief simultaneous tap on the  keys of the

left four-way button will change from the transmitter’s base screen or from almost any menu position to the »Servo display« menu, see page 274.

• »Telemetry« menu Tap the center ESC key of the left four-way but-

ton for about 1 s to call up the »Telemetry« menu from the transmitter’s base screen or return to the base screen again, see text beginning on page

228.

• Graphic display of telemetry data

Brieﬂy touching one of the selection keys of the left or right four-way button will cause a jump from the base screen directly to the transmitter’s graphic display of telemetry data or will allow paging back and forth between individual graphic displays.

A brief tap on the center ESC or SET key will cause a return back to the base screen.

• »SECRET MODE« (Language selection, Firmware update, Stick calibration etc.)

Touch and hold the  selection keys of the left four-way button then momentarily touch the SET key of the right four-way button, see text beginning on page 34.

• Entry lockout Entry lockout is activated and deactivated from the

base screen by simultaneously touching the ESC and SET keys for about 2 s.

• Quick-Select

Transmitter description - Shortcuts

From the multi-function list, a jump can be made into a “Structure overview” by way of a brief, simultaneous tap on the  or  keys of the right four-way button. Menus are arranged in clear groups in this overview.

All menus

Memory Servo setting Transm. controls Switches Flight phases Timers Mixers Special. funct. Global functions

Now the desired group can be selected with the  selection keys of the left or right four-way button …

All menus

Memory

Servo setting Transm. controls Switches Flight phases

… then ﬁnally tap the center SET key of the right four-way button brieﬂy. As soon as the key is released, only the respective generic term for the given menu will remain listed. For example:

Model select

Copy / Erase Suppress menus Suppress models

Now you can select the desired menu point using the  or  buttons, and then call it up by pressing the SET button of the right-hand four-way button.

Concealed menu columns

Some menus have concealed columns to improve legibility. Menus with concealed columns can be recognized by virtue of a triangle pointing to the right in the bottom left corner of the screen. For example, in the menu »Servo settings«:

S1 S2 S3 S4 S5

Rev cent

In this menu, e. g. the column “- lim +” (servo travel limit) to the right of column “- travel +” is “concealed”.

To reach this column, use the pointing triangle at the bottom left of the screen to push the frame marker with the arrow key  of the left or right four-way button to just beyond the column for “- travel +”:

S1 S2 S3 S4 S5

Rev cent

To again return to the now-concealed column “- travel +” or even further to the left, push the frame marker with arrow key  of the left or right four-way button appropriately to the left:

0% 0% 0% 0% 0%

100% 100% 100% 100% 100%

150% 150% 150% 150% 150%

100% 100% 100% 100% 100%

trv

150% 150% 150% 150% 150%

lim

S1 S2 S3 S4 S5

Rev cent

This procedure is analogous for the other menus.

0% 0% 0% 0% 0%

100% 100% 100% 100% 100%

trv

31Transmitter description - Concealed menu columns

Function ﬁelds in the display

Position indicator

Entry lockout

CLR, SEL, STO, SET, SYM, ASY, POS, , Depending on the given menu, certain function ﬁelds

will appear on the bottom display line:

CLR SEL STO SYM ASY

A marked function is activated with a tap on the

SET key.

Function ﬁelds

• CLR (clear) erase

• SEL (select) selection

• SET (set) “set” or adjust a value

• STO (store) store (e. g. control position)

• SYM set values symmetrically

• ASY set values asymmetrically

• POS Only in »Trim memory« menu

switch ﬁeld symbol (assignment of

•

all types of switches)

within a menu, change to the sec-

•

ond page, (menu continuation)

INC/DEC buttons CTL 5 and 6 When you operate one of the two INC/DEC buttons

CTL 5 + 6, which are ﬁtted to the two switch boards of the mc- 2 0 HoTT transmitter only, a small symbol appears on the left of the screen adjacent to the two vertical position indicators:

At the same time, for the duration of the control‘s operation, the position indicator for the two vertical bars in the middle will change from displaying current trim position to a display of the respective current position of the controls CTL 5 & 6.

Logically, the left control (CTL 6) is displayed by the left bar indicator and the right bar indicator displays the position of the right control (CTL 5). The two horizontal bars continue to show current trim positions of respective stick trim controls:

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Note: This option is only available as standard on the mc-

20 HoTT transmitter, but can be unlocked on the mc-16 HoTT transmitter at extra cost.

A lockout for the touch keys, and thus protection against inadvertent use of all setting options, can be established by touching and holding the ESC and

SET keys simultaneously for about two seconds while

the transmitter is in its basic display. This lockout condition is indicated by a key symbol, located at the intersection point of the trim bars, which is displayed in reverse video.

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The lockout is effective immediately but controls remains operationally ready.

This lockout can be removed by again touching and holding the ESC and SET keys for about two seconds.

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About 2 seconds after operating one of the controls has ended, the display will again revert to display of current trim positions of the four trim controls generated by the two sticks.

Note: On the buttons can be retro-ﬁtted by your local Graupner Service Centre at extra cost.

T ransmitter description - Function ﬁelds | P osition indicator | Entry lock out

mc-16 HoTT transmitter these two INC/DEC

Warning notices

Batt. must be re charged!!

BIND. N/A

Power on warning

is active!

Attention!

Switch-OFF

the Receiver first!

CAN‘T

RECEIVE

DATA

Please select

RF on/off? ON OFF

must be

OFF

Operating voltage is too low

„Bind not available“ A receiver has not yet

been bound to the currently active model memory. A brief tap on the SET key will cause a direct jump to the appropriate option.

If no controls are operated on the transmitter, it switches itself off automatically after about three minutes.

This warning appears if you try to change models in the »Model select« menu with the receiver of the previously active model still switched on.

No bound receiver in range

Only for a receiver that has already been bound:

Please select RF „on“ or „off“? RF

Request to switch off the RF section.

Fail Safe setup

t.b.d.

Failsafe has not yet been activated

The throttle stick of a

Thr too high!

ﬁxed-wing model, or the throttle limiter of a helicopter, is too far in the direction of fullthrottle.

No pupil signal

SD-CARD

INSERT

Connection between teacher and pupil transmitter is interrupted

No SD or SDHC memory card in the card slot or card is not legible

• If battery voltage is too low, a model switch is blocked for reasons of safety. An appropriate message will appear in the screen:

not possible now voltage too low

• Is the “wireless teacher/pupil connection” that was active when the transmitter was last used to be continued, ACT or switched off INH?

Please select

Trainer link?

ACT INH

Please select

Trainer link?

ACT INH

33Transmitter description - Warning notices

HIDDEN MODE

Language selection, Firmware update, Stick calibration etc. The mc-16 HoTT and m c- 20 HoTT transmit-

ter’s »HIDDEN MODE« menu can be called up from almost any menu position by touching and holding the  selection keys of the left four-way button and the SET key of the right four-way button for at least 3 seconds. This will produce the display shown below.

 HIDDEN MODE 

VOICE FIRMWARE UPDATE STICK CALI. BLUETOOTH INIT.

VOICE

As mentioned in section “Headsets” on page 23, the transmitter’s acoustic signals as well as those signals and announcements associated with the »Telemetry« menu can be output by way of the headset connector. These announcements are made in German language by default. These announcements are summarized in a voice packet which is stored in a transmitter-internal memory but they can be replaced by a voice packet of a different language at any time.

At the time of this manual’s revision, the standard SD card delivered with the set includes the following languages:

• Dutch

• English

• French

• German

• Italian

• Spanish The given active language packet can be swapped

out either with the PC program available as a download from the transmitter’s web page at www.graupner.de or with the SD card, as described below. If not already done, insert the SD card or SDHC card into the transmitter as described on page 24. Once the

Transmitter description - Hidden mode

memory card is inserted in the transmitter, switch the transmitter on with RF switched off.

Please select

RF on/off?

ON OFF

Now move to the »HIDDEN MDE« menu as described earlier in this section:

Language change

Use the selection keys of the left or right four-way button to select the line “VOICE” line:

 HIDDEN MODE 

VOICE FIRMWARE UPDATE STICK CALI. BLUETOOTH INIT.

Use the center SET key of the right four-way button to switch to the selection page for the “VOICE” line:

FILE LIST

VOICE2_DUTCH.VDF

VOICE2_ENGLISH.VDF VOICE2_FRANCE.VDF VOICE2_GERMAN.VDF VOICE2_ITALIANO.VDF VOICE2_SPAIN.VDF

Now use the  keys of the left or right four-way button to choose the desired language, for example:

FILE LIST

VOICE2 DUTCH.VDF

VOICE2_ENGLISH.VDF

VOICE2_FRANCE.VDF VOICE2_GERMAN.VDF VOICE2_ITALIANO.VDF VOICE2_SPAIN.VDF

Conﬁrm the choice with another tap on the center

SET key of the right four-way button. The selected

language packet will be loaded into the transmitter’s

memory:

 HIDDEN MODE 

VOICE FIRMWARE UPDATE STICK CALI. BLUETOOTH INIT.

22/100%

The loading process is ﬁnished as soon as the progress bar at the lower edge of the display disappears:

 HIDDEN MODE 

VOICE FIRMWARE UPDATE STICK CALI. BLUETOOTH INIT.

When this process is ﬁnished, switch off the transmitter.

All settings stored in the transmitter remain intact after a change of language has been made.

Notes:

• If the warning …

must be

OFF

… appears, then the transmitter’s RF radiation is still active. Jump to the »Base setup mod- el« menu, select the “RF transmit” line, select its “OFF” option then repeat the procedure

• If the warning …

SD-CARD

INSERT

… appears then the transmitter does not detect a memory card in its card slot or the card found can-

not be read.

• If the selection window is empty …

FILE LIST

… then the transmitter could not ﬁnd an appropriate ﬁle on the inserted memory card. Check the contents of the SD card’s “VoiceFile” directory on a PC or laptop.

FIRMWARE UPDATE Change display language

Important notice: Be sure to check the charge status of your transmitter’s battery or charge its battery as a precaution before every update. Also backup all occupied model memories so they can be restored if that should become necessary.

 HIDDEN MODE 

VOICE FIRMWARE UPDATE STICK CALI. BLUETOOTH INIT.

In the same manner as described above in the section “VOICE”, this menu item can be used to update or change the transmitter’s ﬁrmware, including its display language. At the time of this manual’s revision, the standard SD card delivered with the set includes the following languages:

• Dutch

• English

• French

• German

• Italian

• Spanish Additional languages will follow at a later date. Updates and additional information for your system

can be found on the product page for your speciﬁc HoTT transmitter in the Download section at www. graupner.de.

FILE LIST

MC-20_1V234_Dutch.bi

MC-20_1V234_English. MC-20_1V234_France.b MC-20_1V234_German.b MC-20_1V234_Italiano MC-20_1V234_Spain.bi

Now use the  selection keys of the left or right four-way button to choose the desired ﬁrmware version, for example:

FILE LIST

MC-20 1V234 Dutch.bi

MC-20_1V234_English.

MC-20_1V234_France.b MC-20_1V234_German.b MC-20_1V234_Italiano MC-20_1V234_Spain.bi

Conﬁrm the choice with another tap on the center

SET key of the right four-way button. The loading of

ﬁrmware into the transmitter’s memory will be started and following two displays, visible only very brieﬂy, which only make reference to the ﬁrmware update …



Firmware Download



Prozess Start



Please Wait....

  



Boot Download



Success!!!



Please Wait....

  

…, the message:



Firmware



Downloading...



Progress 023/201

  

… will appear in the display. As soon as the counter to the left of the “/” character reaches the value shown on the right as the volume to be loaded, the message …



Firmware Upgrade



success!!!

 

… will appear. After a few seconds this message disappears, and the transmitter switches itself off. The transmitter is now ready for use.

Notes:

• If the warning …

must be

OFF

…, then the RF section of the transmitter is still active. Switch it off in the “RF module” line of the »Basic settings« menu, and repeat the proce-

35Transmitter description - Hidden mode

dure.

• If the warning …

SD-CARD

INSERT

… appears then the transmitter does not detect a memory card in its card slot or the card found cannot be read.

• If the selection window is empty …

FILE LIST

… then the transmitter could not ﬁnd a suitable ﬁrmware ﬁle on the inserted memory card. Check the contents of the SD card’s “Firmware” directory on a PC or laptop.

STICK CALIBRATION

If you feel the neutral position of your self-centering sticks (controls 1 … 4) are not exactly 0 % of their control travel, then this can be checked and, if necessary, corrected as follows:

Jump to the »Model select« menu and initialize a free model memory as described on page 79. Whether the model to be initialized is a winged aircraft or a helicopter is irrelevant.

Wait for the notices which typically appear in the transmitter’s base screen following a model change then jump to the »Servo display« menu, for example by simultaneously touching the  keys of the left four-way button WITHOUT any interim changes to trim settings or other program settings.

If all four of your transmitter’s stick functions are still self-neutralizing, this display should ideally look like

the one shown below:

1 3 5 7 9

0% 0% 0% 0% 0% 0%

2 4 6 8

0% 0% 0% 0% 0%10 0%

Note: The screen-shot above, and the two which follow, show the screen of the mc- 2 0 HoTT transmitter. The screen of the standard eight-channel mc-16 HoTT shows correspondingly fewer channels.

Otherwise the graph bars show current setting percentages for joystick control functions which are not self-neutralizing – typically for the “C1” throttle/brake or throttle/pitch stick. For example, if the throttle/brake stick is in its “quarter-throttle” position, the display would appear as shown below:

–50%

1 3 5 7 9

0% 0% 0% 0% 0%

2 4 6 8

0% 0% 0% 0% 0%10 0%

One after the other, put both sticks into each of their four possible limit positions without exerting force at the limit position. In each of these eight possible limit positions, the – side dependent – indication for exactly

-100 % or +100 % should be displayed. For example, if transmitter control 2 is at its right limit and the other three stick functions are in their respective middle positions then the transmitter’s display should look like the one shown below:

1 3 5 7 9

0% 0% 0% 0% 0% 0%

2 4 6 8

–100%

0% 0% 0% 0%10 0%

Regardless of the number of self-neutralizing stick functions available on your transmitter, if these checks produce four 0 % results and eight 100 % results then your transmitter’s sticks are optimally calibrated. You can terminate this process then, if appropriate, delete the model memory just created.

Otherwise jump (as described at the outset of the previous double page) to the “STICK CALIBRATION” line in the »SECRET MODE« menu then brieﬂy touch the center SET key of the right four-way button.

STICK CALIBRATION





The  selection keys of the right four-way button will now allow you to cyclically select the four calibrated stick planes, e. g. the left/right plane of the right stick:

STICK CALIBRATION





Now position the right stick – without exerting extra force – to its left limit corresponding with the on-screen blinking arrow pointing to the left:

Transmitter description - Hidden mode

STICK CALIBRATION





+102%

… and brieﬂy tap the center SET key of the right fourway button. This concludes this example calibration of the right stick’s left limit. The circle in the middle of the stylized stick plane will now blink as conﬁrmation of the calibration:

STICK CALIBRATION





+100%

Now release the self-neutralizing stick so it can return to its center position and then tap again on the center

SET key to calibrate the stick’s centered position. The

right triangle marker will begin to blink:

STICK CALIBRATION





Repeat the calibration process for the right limit of the right stick. The other stick planes are calibrated analogously.

Proceed similarly to calibrate the two sliders mounted in the middle console and the two proportional rotary controls on the sides of the transmitter. The calibration options for these proportional controls can be reached by repeatedly tapping on the  or  selection keys of the right four-way button until the desired

calibration position is reached, e. g. …

SLIDE CALIBRATION





LEVER CALIBRATION

















Notes:

• Correct any bad calibrations by repeating the respective process.

• Within a given stick plane, each of the three calibration positions can be selected directly with the  selection keys of the left or right four-way button.

Brieﬂy touching the center ESC key of the left fourway button will terminate the process and return to the sub-menu “STICK CALIBRATION”.

Bluetooth initialisation

 HIDDEN MODE 

VOICE FIRMWARE UPDATE STICK CALI. BLUETOOTH INIT.

If you install a Bluetooth module, Order No. 33002.5, you should use this menu point to initialise it as described in the instructions supplied with the unit.

37Transmitter description - Hidden mode

Telemetry data display

mc-16 HoTT transmitter features a single

The screen below the aerial socket which is used both for operating the transmitter and also to display telemetry data in graphic form. You can switch between the two operating modes by pressing one of the Select buttons  or  of the left-hand four-way button in the base display.

mc- 2 0 HoTT transmitter has two independent

The displays; a display for operating the transmitter and a display just below the antenna socket for the graphic display of telemetry data. This display is activated automatically as soon as the transmitter receives telemetry data from the receiver via the return channel.

0:00 0:00

#01

Stp Flt

HoTT

0.0V

4.1V

0:00h

If however, at the lower edge of the base display, only “X” – as shown in the ﬁgure above – is displayed at two locations instead of “ ”, then the telemetry display will show the warning …

CAN‘T

RECEIVE

DATA

…, on the front screen of the mc- 2 0 HoTT, displaced shortly afterwards by the Graupner/SJ logo and the transmitter name …

mc20

…, and this means that there is no receiver within

Transmitter description - Telemetry data display

range capable of exploiting the telemetry link. Switch on the model’s receiver system or bind a receiver to the active model memory as described in detail on page 87 or 95.

0:00 0:00

#01

Stp Flt

HoTT

4.8V

4.1V

0:01h

If a telemetry link is present, the front screen of the

mc- 2 0 HoTT shows the “Receiver” display by

default. The same occurs on the mc-16 HoTT trans- mitter after you select the Telemetry display mode …

RX–S QUA: 100% RX–S STR: 100% RX–dBm: –33dBm TX–dBm: – 33dBm

L–PACK: 10ms

RX–VOLT:4.8V TMP R–LOW V:4.6V +22°C

… which is described in more detail in a section by the same name on the next page.

Sensor Select

Up to four sensors can be connected, in any combination, to a telemetry-capable receiver. However, the data output by these sensors must be (as described on page 252) selected in the »SENSOR SELECT« sub-menu of the »Telemetry« menu …

SENSOR SELECT

RECEIVER GENERAL MODULE ELECTRIC AIR.MOD VARIO MODULE GPS

… in order to activate their display. This data from the

selected sensors is then appropriately prepared for illustration by the graphic indicators as described below. You must also ensure that the receiver selected in the “Telemetry receiver” line of the »Telemetry« menu (Bind 1 or 2) is the one to which the sensors are connected; see pages 87 and 95. If you select the “wrong” receiver, the “Receiver” display will only show the data from that unit.

Furthermore, only sensors activated in the »SETTING & DATAVIEW« sub-menu of the »Telemetry« menu, beginning page 241, according to the instructions included with the given sensor will be responsive.

To switch between the screens for activated sensors in the »SENSOR SELECT« sub-menu of the »Tele- metry« menu, tap brieﬂy on one of the  selection keys of the left or right four-way button …

RECEIVER

GENERAL

ELECT. AIR

VARIO

GPS

AIR ESC

… and, after the selected screen has been displayed, use one of the  two keys to select the line of the desired sensor. If no sensor is activated, then all display lines and sensors described in the next column, except for the “RECEIVER” line, are blended out of the display and the selection list:

RECEIVER

The selection can be conﬁrmed right away by activating the center SET key of the right four-way button or

by simply waiting until, after a brief pause, the main

0ml

display of the given selected sensor appears automatically.

Notes:

• The sequence of the below described displays is a consequence – starting from the given main display – of taps on the  key.

• More details about the following named modules can be found in the appendix and in Internet at www.graupner.de in the web page for the given product.

RECEIVER

RX–S QUA: 100% RX–S STR: 100% RX–dBm: –33dBm TX–dBm: – 33dBm

L–PACK: 10ms

RX–VOLT:4.8V TMP R–LOW V:4.6V +22°C

This screen presents the »RX DATAVIEW« of the »Telemetry« menu’s »SETTING & DATAVIEW« sub-menu, see page 241, with data processed and displayed graphically.

The displayed items are as follows:

Value Explanation

RX-S QUA signal quality in % RX-S STR signal strength in % RX-dBm Reception power in dBm TX-dBm transmit power in dBm L-PACK Indicates the longest time span in ms

in which data packages are lost in the transmission from the transmitter to the receiver.

RX-VOLT current operating voltage of the

receiver's power supply in volts

R-LOW V Lowest receiver operating voltage since

last startup, in volts

TMP the thermometer depicts the receiver's

current operating temperature

GENERAL MODUL

RECEIVER

GENERAL

ELECT. AIR

VARIO

GPS

AIR ESC

BAT1

BAT2

BAT1

BAT2

E FUEL F

0.0V

T1 0°C

0.0V T2 0°C

E FUEL F

0.0V

T1 0°C

0.0V T2 0°C

CELL.V

1:0.00 2:0.00 3:0.00 4:0.00 5:0.00 6:0.00

ALT

0m 0m1 0m3

POWER

0.0V

0.0A 0

If attached to the receiver, this screen will display the data acquired by a General-Engine module, order no. 33610, or a General-Air module, order no. 33611. More details about these modules can be found in the appendix or in Internet at www.graupner.de in the web page for the given product.

Depending on how this module is equipped with sensors, this screen can permanently display the data shown in the table below.

The current voltage of up to two batteries (BAT1 and

BAT2), the measurement results of up to two temperature sensors (T1 and T2) and a ﬁll level gage for the fuel tank.

An alternating display along the screen’s right edge will display a list of current cell voltages for a LiPo battery with up to six cells or operational data (current altitude with respect to the starting location, ascent/ decent m/1 s and m/3 s, current current being drawn in amperes and current voltage of the battery connected to the sensor).

The displayed items are as follows:

Value Explanation

BAT1 /

battery 1 or 2

BAT2 FUEL fuel level / tank gage E / F empty / full T1 / T2 temperature of sensor 1 or 2 CELL V cell voltage of cells 1 … max. 6 ALT current altitude 0m1 m/1 s ascent/decent rate 0m3 m/3 s ascent/decent rate A current draw in amperes V battery voltage

Battery and load indicators

0.0V

0.0A 0mAh

This display depicts current voltage, current current draw and, if attached, the expended capacity of “Batt 1” connected to the General-Engine module (order no. 33610) or General-Air (order no. 33611)

39Transmitter description - Telemetry data display

module as well as the fuel consumed in ml.

0.0

SENSOR 1

tary speed of a speed sensor (order no. 33615 or

33616) attached to a General-Engine module (order no. 33610) or a General-Air module (order no. 33611).

Air pressure display

SENSOR 1

0.0V 0°C

If attached, this display depicts currently measured voltage and temperature from a temperature/voltage sensor, order no. 33612 or 33613, connected to “T(EMP)1” of the General-Engine module (order no. 33610) or the General-Air module (order no. 33611).

SENSOR 2

0.0V 0°C

If attached, this display depicts currently measured voltage and temperature from a temperature/voltage sensor, order no. 33612 or 33613, connected to “T(EMP)2” of the General-Engine module (order no. 33610) or the General-Air module (order no.

33611).

Note: The appropriate blade count must ﬁrst be set in the module’s telemetry menu before the correct speed can be displayed.

Vario

m m

If attached, this display will depict the altitude (in m) relative to location, starting location as well as the current rate of ascent/descent (in m/s) data originating from a Vario integrated into a General-Engine module (order no. 33610) or General-Air module (order no. 33611).

Speed display

km/h

0.0

If the corresponding sensor is available, this screen displays the actual air pressure.

“Weakest cell”

Bar

Cell0=0.00V

If the corresponding sensor is available, this screen displays the voltage of the weakest cell in a battery block, together with the number of that cell.

ELECTRIC AIR MODUL

RECEIVER

GENERAL

ELECT. AIR

VARIO

GPS

AIR ESC

Rotary speed sensor

rpm

If attached, this display depicts the measured ro-

Transmitter description - Telemetry data display

If the corresponding sensor is available, this screen displays the model’s actual speed over the ground.

0.0V 0A ALT 0m

BAT1 0m/1s

0.0V 0m/3s

T1 0°C

BAT2

0.0V T2 0°C

0 1L0.00 2L0.00 3L0.00 4L0.00 5L0.00 6L0.00 7L0.00

0.0V 0A ALT 0m

BAT1 0m/1s

0.0V 0m/3s

BAT2

0.0V T2 0°C

If attached to the receiver, this display will depict the data acquired by an Electric-Air module, order no.

33620. More details about this module can be found in the appendix or in Internet at www.graupner.de in the web page for the given product.

Depending on how this module is equipped with sensors, this screen can permanently display the data shown in the adjacent table.

The current voltage of up to two batteries (BAT1 and BAT2), up to two temperature measurements (T1 and T2), current altitude with respect to the starting location, the model’s ascent/decent rate in m/1 s and m/3 s and, in the middle of the screen, the current draw currently being taken from a power source.

Along the right edge of the screen is a table of alternating values for cell voltages at balancer connections (L) or voltages for up to 7 attached battery cell packs (H).

The displayed items are as follows:

Value Explanation

V current voltage A current current BAT1 /

BAT2 ALT current altitude m/1s m/1 s ascent/decent rate m/3s m/3 s ascent/decent rate T1 / T2 temperature of sensor 1 or 2

battery 1 or 2

T1 0°C

0 1H0.00 2H0.00 3H0.00 4H0.00 5H0.00 6H0.00 7H0.00

L or H cell voltage of cells 1 … max. 14

L = balancer connection 1 H = balancer connection 2

Micro-copter display

0.0V 0:00

0mAh

0 0km/h

This screen displays the data generated by a HoTTcompatible micro-copter. Key, reading from top left to bottom right:

Value Explanation

V Actual voltage „0:00“ Period switched on mAh Battery capacity consumed „0“ Altitude relative to take-off point,

according to GPS system

km/h Speed over ground, according to GPS

system Alt Actual altitude Dir Direction of movement I Actual current m Distance from take-off point, according

to GPS system ° Position in degrees relative to take-off

point, according to GPS system Any messages from the micro-copter sensor are

displayed in the bottom line of the screen, which is empty in the screen-shot shown above.

Alt: 0m Dir:

0° 0A

0m 0°

ACCU

0.0V

0.0A 0mAh

This display depicts current voltage, current current draw and, if attached, the expended capacity of “Batt 1” connected to the Electric-Air module (order no. 33620).

SENSOR 1

0.0V 0°C

If attached, this display depicts currently measured voltage and temperature from a temperature/voltage sensor (order no. 33612 or 33613) connected to “T(EMP)1” of the Electric-Air module (order no. 33620).

SENSOR 2

0.0V 0°C

If attached, this display depicts currently measured voltage and temperature from a temperature/voltage sensor (order no. 33612 or 33613) connected to “T(EMP)2” of the Electric-Air module (order no. 33620).

41Transmitter description - Telemetry data display

Vario

0.0

VARIO

Micro-copter display

m m

Speed display

km/h

If the corresponding sensor is available, this screen displays the model’s actual speed over the ground.

“Weakest cell”

Cell0=0.00V

If the corresponding sensor is available, this screen displays the voltage of the weakest cell in a battery block, together with the number of that cell.

RECEIVER

GENERAL

ELECT. AIR

VARIO

GPS

AIR ESC

m/1s

0.0

m/3s

0.0

m/10s

0.0

If attached to the receiver, this display will depict the data acquired by a Vario module, order no. 33601.

The displayed items are as follows:

Value Explanation

ALT current altitude RXSQ Signal quality of the signal received by

the receiver in %, see page 241.

MAX the preset maximum altitude limit

relative to starting location at which, when exceeded, will cause an audible warning to be sounded

MIN the preset minimum altitude limit

relative to the starting location at which, when underrun, will cause an audible

warning to be sounded m/1s m/1 s ascent/decent rate m/3s m/3 s ascent/decent rate m/10s m/10 s ascent/decent rate

ALT 0

RXSQ 0

MAX 0m

MIN 0m

0.0V 0:00

0mAh

0 0km/h

This screen displays the data generated by a HoTTcompatible micro-copter. Key, reading from top left to bottom right:

Value Explanation

V Actual voltage „0:00“ Period switched on mAh Battery capacity consumed „0“ Altitude relative to take-off point,

according to GPS system

km/h Speed over ground, according to GPS

system Alt Actual altitude Dir Direction of movement I Actual current m Distance from take-off point, according

to GPS system ° Position in degrees relative to take-off

point, according to GPS system Any messages from the micro-copter sensor are

displayed in the bottom line of the screen, which is empty in the screen-shot shown above.

Alt: 0m Dir:

0° 0A

0m 0°

Transmitter description - Telemetry data display

Vario

0.0

GPS

Micro-copter display

m m

If attached, this display will depict altitude relative to location or starting location (in m) as well as the current rate of ascent/decent (in m/s) from data acquired by a Vario module (order no. 33601).

Text display

If the corresponding sensors are available, text from them showing 2 x 10 or 3 x 7 characters can be superimposed in the two following displays when required:

RECEIVER

GENERAL

ELECT. AIR

VARIO

GPS

AIR ESC

Kmh

If attached to the receiver, this display will depict the data from a GPS module with integrated Vario, Order No. 33600.

Aside from the model’s current position and speed, the center section of this screen will also display current altitude with respect to the starting location as well as the model’s current ascent/decent rate in m/1 s and m/3 s, current reception quality and the model’s distance from its starting location.

The displayed items are as follows:

Value Explanation

W / N / E / S west / north / east / south Kmh speed RXSQ return channel signal quality DIS distance ALT current altitude with respect to starting m/1s m/1 s ascent/decent rate m/3s m/3 s ascent/decent rate

N 0°00.0000 E 0°00.0000

RXSQ 0 DIS 0m ALT 0m

0.0m/1s 0m/3s

0.0V 0:00

0mAh

0 0km/h

This screen displays the data generated by a HoTTcompatible micro-copter. Key, reading from top left to bottom right:

Value Explanation

V Actual voltage „0:00“ Period switched on mAh Battery capacity consumed „0“ Altitude relative to take-off point,

according to GPS system

km/h Speed over ground, according to GPS

system Alt Actual altitude Dir Direction of movement I Actual current m Distance from take-off point, according

to GPS system ° Position in degrees relative to take-off

point, according to GPS system Any messages from the micro-copter sensor are

displayed in the bottom line of the screen, which is empty in the screen-shot shown above.

Alt: 0m Dir:

0° 0A

0m 0°

43Transmitter description - Telemetry data display

GPS

0.0

If attached to the receiver, this display will depict the data from a GPS module with integrated Vario, Order No. 33600.

The displayed items are as follows:

Value Explanation

W / N / E / S west / north / east / south km/h speed DIS horizontal distance in m m/s ascent/decent rate in m/s ALT altitude relative to starting location in m

Vario

0.0

0 0

km/h DIS

m/s ALT

Speed display

km/h

If the corresponding sensor is available, this screen displays the model’s actual speed over the ground.

AIR ESC

RECEIVER

GENERAL

ELECT. AIR

VARIO

GPS

0( 0)°C

AIR ESC

0.0A

0.0V/ 0.0V 0mAh

0.0A

Value Explanation

V Left-hand value: actual battery voltage

Right-hand value: actual battery voltage in present power-on period

°C Left-hand value: actual speed controller

temperature Value in brackets: maximum controller

temperature in present power-on period mAh Battery capacity consumed A Centre and bar display: actual current

Right-hand value: maximum current in

present power-on period rpm Centre and bar display: actual rotational

speed of the motor connected to the

speed controller.

Right-hand value: maximum rotational

speed in present power-on period

RPM display

m m

If attached, this display will depict the altitude (in m) relative to location, starting location as well as the current rate of ascent/descent (in m/s) from data originating from the Vario integrated into the GPS-/ Vario module (order no. 33600).

Transmitter description - Telemetry data display

This screen displays the data generated by a brushless speed controller with internal telemetry, Order No. 33718 to 33770 and 33850 (correct at time these instructions were revised), which is connected to the receiver.

Key, reading from top left to bottom right:

0rpm

rpm

This screen displays the current rotational speed of the motor connected to the brushless speed controller.

Current / consumption display

0.0A

0mAh

This screen displays the actual current consumption, the peak drain which has occurred in the present power-on period, and the capacity drawn from the battery connected to the brushless speed controller within the same period.

45Transmitter description - Telemetry data display

Commissioning the transmitter

Preliminary remarks about the mc-16 HoTT and mc-20 HoTT transmitters

Preliminary remarks

The Graupner/SJ HoTT system theoretically permits simultaneous operation of more than 200 models. However, because of the interspersed radio-frequency utilization permitted by certiﬁcation for the 2.4 GHz ISM band, this number is signiﬁcantly lower in practical application. Nevertheless, in general more models can be operated simultaneously in the 2.4 GHz band than would be the case in conventional 35 or 40 MHz frequency bands. The real limiting factor is – as often before – still likely to be the size of available operating space (i. e. airspace for aircraft). Alone the fact that it is no longer necessary to coordinate transmitting frequencies with other pilots in the vicinity (which is sometimes quite difﬁcult in broken landscapes, such as on hillside slopes) represents an enormous boost for remote control operating security.

Battery charged?

Since the transmitter is delivered with an empty (not charged) battery, the battery must ﬁrst be charged according to the charging instructions on page 16. Otherwise a warning tone will be sounded and an appropriate message will be blended into the basic display if the low voltage threshold set in the “Battery warning” line of the »General basic settings« menu, see page

Batt. must be re charged!!

272, is underrun.

Commissioning the transmitter

Transmitter startup

After being switched on, the message shown below will appear in the transmitter’s screen for about two seconds.

Please select

RF on/off?

ON OFF

Within this brief period there is an opportunity to switch RF transmission off by using the  or  key of the right four-way button to shift the position of the ﬁeld shown in inverse video to the right so that ON is in standard video and OFF is presented in inverse video:

Please select

RF on/off?

ON OFF

Now switch the RF module off by tapping on the center SET key of the right four-way button.

The telemetry display just below the antenna socket will then brieﬂy show the message …

CAN‘T

RECEIVE

DATA

… and in parallel to this, the transmitter’s basic display will appear similar to that shown below:

0:00 0:00

HoTT

0.0V

#01

0:00h

Stp Flt

4.1V Mx

The symbol combination means that the currently active model memory has already “bounded“ with a Graupner/SJ-HoTT receiver but there is no connection to that receiver at the moment. (In this example,

RF transmission has been switched off.) If, however, the transmitter is switched on without

switching RF transmission off, the symbolic antenna mast will blink. At the same time, an acoustic warning will sound until a connection is established with the respective receiver. As soon as the connection is established, the “X” at the base of the symbolic antenna will be replace with a ﬁeld strength indicator, for example

, and the visual and acoustic warnings

will cease. If a telemetry connection has also been established

for the incoming signal, that is output by the receiver in the model, then the right side of this same screen line will display a similar indication of signal strength for this reception of the receiver’s transmitted signal

) as well as the current voltage of the receiver’s

(>M power supply.

On the other hand, if the symbol combination appears in the display and the front display shows the message “Can’t receive data” then the currently active model memory is not “bound” to any receiver at the moment.

Under-voltage warning

If the transmitter’s voltage drops below a certain value set in the »General basic settings« menu, page 272, 3.60 V by default, there will be visual and acoustic under-voltage warnings issued.

Important notices:

• The transmitter in the set is already preset, as delivered, with default values which are correct for operation in most European countries (except France).

If the remote control system is to be operated in France then the transmitter’s “Region” setting MUST be changed over to “FRANCE” mode, see page 272. IN NO CASE may the Universal/EUROPE mode be used IN FRANCE.

• Up to eight servos can be operated with the

GR-16 receiver supplied in the set; this receiver is supplied already bound to the ﬁrst model memory.

Up to twelve servos can be operated with the GR-24 receiver supplied in the set; this receiver is supplied already bound to the ﬁrst model memory.

In order to achieve the greatest possible ﬂexibility but still preclude unnecessary inadvertent operator errors, control channels 5 … 8 respectively 5 … 12 have not been assigned to any controls. This means that servos connected by way of these channels will remain in their middle positions until an operator element has been assigned. Practically all mixers are initially inactive for this same reason. More about this can be found on page 118 (winged aircraft) or 122 (helicopter models).

• The fundamental procedure for initial programming of a new model memory location can be found on page 76 and the programming examples that begin on page 282.

• When the remote control system is switched on, being bonded or when making settings, that the transmitter’s antenna is always far enough away from the receiver’s antennas. If the transmitter’s antenna is brought too close to the receiver’s antennas this will cause receiver over-modulation and its red LED will illuminate. At the same time the return channel will drop out and, as a consequence, the ﬁeld strength indicator in the transmitter’s screen will be replaced by an “x” and the receiver’s current battery voltage display will show 0.0 V. The remote control is then in Fail-Save mode, see page 208, i. e. servos will remain in their current positions until a new, valid signal can be received. In such a case, increase the distance (between the transmitter and the model

mc-16 HoTT

mc- 2 0 HoTT

containing the receiver) until the indicators are again “normal”.

• Never switch the transmitter off whilst operating a model! If this should happen accidentally, keep your nerve and wait until the transmitter screen is entirely blank, i. e. until the transmitter has shut down completely; this takes at least three seconds. Do not switch your transmitter on again until this has occurred. If you neglect this, there is a risk that the transmitter will “hang” immediately after being switched on, and you will lose control of the model. In this case your only recourse is to switch the transmitter off again, allow it to shut down completely, and then switch on once more after the correct interval.

47Commissioning the transmitter

Downloading a ﬁrmware packet

Transmitter ﬁrmware updates are carried out …

• … either as described under “FIRMWARE UPDATE / Change display language” in the section »Secret mode« on page 35 …

• … or as described below with the help of a PC running a Windows XP, Vista or 7 operating system.

Current software and information is available in Internet at www.graupner.de under the Download link for the given product.

Note: You will automatically be notiﬁed of new updates per email after registering your transmitter at https://www. graupner.de/en/service/product_registration.aspx.

The aforementioned “given product page” is most easily reached by entering “www.graupner.de” into your Internet browser’s address line then pressing the ENTER key on your PC or laptop keyboard.

On the so-called “homepage” for Graupner, click on one of the “ﬂags” to switch the website to a language of your choice, e. g. the British ﬂag for English. After-

Downloading a ﬁrmware packet

wards locate the entry ﬁeld with the title “Search”:

Place the cursor in this ﬁeld with a mouse click then enter a search keyword, e. g. the article number printed on the type plate located on the rear side of the transmitter:

Another press of the ENTER key on the PC or laptop will open the sought page:

Now use your Internet browser’s vertical scroll bar to move down the page a bit until the tabs “Characteristics”, “Spare parts”, “Accessories” and “Downloads” appear:

Move to the Download area by clicking on the “Download” tab. Select the ﬁle(s) you need, then doubleclick on “Download” below the selected ﬁle to initiate the downloading process.

When you download “HoTT-Software VX” you actually download the ﬁle “HoTT_Software_VX.zip”. This is a compressed ﬁle containing all the ﬁles required to update the transmitter, HoTT receiver, sensors etc.

Please note: at the time this manual was revised the program packet available is Version “4”: “HoTT-Software V4”.

If you have previously updated the software of certain components of your radio control system using the ﬁrmware from software packet Version “V3” or earlier, but since then have updated at least one of your components using ﬁrmware from software packet “V4”, then it is ESSENTIAL to update all the components of the radio control system with ﬁrmware from packet

Version “V4”. If you neglect this, individual components could malfunction. The same applies to future software packets, i. e. “V5” or higher.

In contrast, if changes are made to individual ﬁrmware ﬁles within a particular version “VX”, then it is sufﬁcient to install just the later ﬁrmware version for the corresponding product. The easy way to check whether ﬁrmware updates are available is to look at the creation date of the download ﬁle. The version numbers of the associated ﬁrmware ﬁles also change.

Now save the compressed ﬁle in a folder of your choice, and unpack it using a suitable program.

If a transmitter update fails to work as described in the following section, please read the chapter entitled “Restoring your transmitter ﬁrmware” on page 52.

Note: At the time these instructions were revised, a list of the current ﬁrmware versions can be called up using the following link: http://www.graupner.de/en/ supportdetail/4d589f17-24b4-4e50-97d2-13a0f39bd13d.

If the link does not work, you can obtain the same information step-by-step via www.graupner.de => Service & Support => Update and revision history for Graupner|SJ HoTT components.

49Downloading a ﬁrmware packet

Transmitter ﬁrmware updates

The USB interface cable (USB-A to mini-B-USB 5-pole) included with the set, will be needed to update the transmitter’s software via the transmitter’s faceside USB interface connector. This cable’s connector is to be directly plugged into the 5-pole mini-USB connector socket on the rear side of the transmitter.

Important notes:

• Please note that the HoTT components in your radio control system can only communicate perfectly if the ﬁrmware is compatible. That is why all the programs and ﬁles required to update all HoTT components are grouped together in one ﬁle, the current version of which is entitled “HoTT_Software_V4.zip”.

• Be sure to check the charge status of your transmitter’s battery or charge its battery as a precaution before every update. Also backup all occupied model memories so they can be restored if that should become necessary.

• It is essential not to disconnect the transmitter from the PC or laptop during an update process! Please ensure that the lead between the transmitter and the computer is making good contact at both ends.

1. Installing drivers

Install the required driver software, included in the “USB Drivers” folder of the program packet, onto your PC or laptop so your computer can handle the transmitter’s integrated USB interface.

Start driver installation with a double-click on the respective ﬁle and follow the on-screen instructions. Once this software has been successfully installed, the computer must be re-started. Drivers only need to be installed once.

2. Installing the software up-loader

Unpack the ﬁle “Firmware_Upgrade_grStudio_ Ver-XX.zip” in a suitable directory then execute the “Firmware_Upgrade_grStudio_Ver-XX.exe” pro-

Transmitter ﬁrmware updates

gram ﬁle with a double-click on its ﬁlename. Follow the instructions provided by the installation wizard.

3. Establishing a transmitter-to-PC connection

With the transmitter switched off, connect the USB cable by way of its 5-pole mini-USB socket to the face-side of the transmitter.

4. Updating transmitter software

Start the “Firmware_Upgrade_grStudio_Ver-X.X” program from the directory where it is located.

Use the selection sequence “Menu”, “Port Setup” or open the “Controller Menu” and click on “Port select”.

Now in the “Port select” window, select the COM port connected to the USB interface. The correct port can be recognized by its designation “Silicon Labs CP210x USB to UART Bridge” in the “Device Name” column. In the above example this would be the “COM 3” port.

Now call up menu option “Firmware Upgrade” from “Menu” or open the “Controller Menu” and click on “Firmware Upgrade”.

Click on the button labeled “File Browse” and select the desired ﬁrmware update ﬁle with a “.bin” ﬁlename extension from the “Open ﬁle” window.

Firmware ﬁles are product-speciﬁcally coded, i. e. if you should accidentally select a ﬁle which does not correspond to the product (e. g. receiver update ﬁle instead of a transmitter update ﬁle), the “Product code error” popup window will appear and the block the update process from starting.

Now switch on the transmitter then start the transmitter update by clicking on the “Download Start” button.

After a brief period a warning will appear stating that the transmitter’s RF transmission will now be interrupted and that, because of this, any receiver system currently in operation should be switched off.

Switch off your receiver system if it is switched on then click on “Yes”.

This will start the actual update process. A progress bar will begin to operate above a sequence of running text lines.

The connection to the PC must not be interrupted during the update process!

Click on “OK”. Subsequently switch off the transmitter and disconnect the USB cable between the transmitter and the PC or Laptop.

If the progress bar hangs up without showing any further progress, close the program and repeat the update process. Be sure to watch for any error messages that may appear.

Do not terminate the update process before the progress bar has reached its right end and the “Firmware Download Success” message appears.

51Transmitter ﬁrmware updates

Restoring the transmitter software

Program segment: “Restore” If a transmitter ﬁrmware update should fail, or if the

transmitter software “hangs” – it may then be impossible to switch the transmitter off using the “POWER” switch – then you can reload the earlier ﬁrmware into the transmitter using the “Restore” program segment.

If you ﬁnd that the screen(s) are still switched on even though you have switched the transmitter off, then please disconnect the transmitter battery connector, wait a few seconds, and plug it in again.

1. Preparation

Connect the transmitter to the PC or laptop, and start the “Firmware_Upgrade_grStudio_VerX.X.exe” program as described under points 3 and 4 on page 50. (Version 2.1, which is the current version at the time this manual was revised, starts without being previously installed.)

2. Starting the “Restore” program segment

Now move to the “Transmitter” section and select the “Emergency” entry under “Controller Menu”:

packed ﬁle “HoTT_Software_VX”. The ﬁle matching your particular transmitter starts with the transmitter designation, e. g.: “mc-20_1vXXX_English.bin” or “mc-16_1vXXX_English.bin” (or “…German.bin” or …).

Now initiate the update process by pressing the “Download Start” button. Wait for a moment until the status bar starts moving, and then switch the transmitter on. The screen may now light up without displaying any data, or – in the case of the

mc- 2 0 HoTT transmitter – the bottom screen

may not light up at all; don’t worry – this is quite normal.

If the following message …

… (“Boot signal receive failed”) appears before you switch the transmitter on, restart the update process by clicking on “Download Start”.

The transmitter must be switched on within the prescribed period. When you do this, it can easily take a minute for the actual update process to start:

The update process must not be interrupted, so please ensure that the USB lead is making good contact at both ends.

The ﬁrmware transfer is concluded when the progress bar reaches the right-hand end. The message “Firmware update ended” indicates that the data transfer was successful:

Now turn the transmitter on again by holding the main switch pressed in for about one second. You will hear the usual power-on melody, the transmitter screen(s) come to life, and you see the Start display “mc-… HoTT” and the current ﬁrmware version.

Finally click on “OK”. Switch the transmitter off and disconnect the USB lead connecting the transmitter to the PC or laptop.

Note that the transmitter must be switched off! Connect the USB lead to the PC or laptop, then connect the other end to the USB socket under the transmitter’s right-hand front cover.

3. Restoring the transmitter software

Press the “File Browse” button, and a program window opens: search for the current ﬁrmware in this window. As mentioned earlier, you will ﬁnd this in the “Ofﬁcial Version \33112_…_33032_mxxx_mc-32 \ SD card \ Firmware” folder in the un-

Restoring the transmitter software

The progress bar indicates that data are being transferred correctly, and [Process Step] is displayed as “No 4, Firmware Update”.

53For your notes

Receiver initialization

Preliminary remarks

Receiver system

The

mc-16 HoTT radio control set includes a GR-

16 bi-directional 2.4 GHz receiver, with sockets for a maximum of eight servos. The mc-20 HoTT set includes a GR-24 bi-directional 2.4 GHz receiver with sockets for a maximum of twelve servos.

If you switch on the GR-16 HoTT receiver supplied in

mc-16 HoTT set, or the GR-24 HoTT receiver

the supplied in the mc- 2 0 HoTT set, and “its” transmitter is not in range, or is switched off, then the receiver’s red LED will illuminate continuously for about 1 s then begin to blink slowly. This indicates the receiver has not (yet) established a link to a Graupner|SJ HoTT transmitter. If a link has been established, the green LED will illuminate continuously and the red LED will extinguish.

In order to establish a link to the transmitter, the Graupner|SJ HoTT receiver must ﬁrst be “bound” to “its” particular model memory in “its” Graupner|SJ HoTT transmitter. This procedure is known as “binding”. This “binding” linkage is only necessary once for each receiver/model memory combination. Refer to pages 87 or 95. The “binding” procedure has been done at the factory for model memory 1 of the units delivered together as a set so this “binding” procedure will only be necessary to link additional receivers or if a memory location change becomes necessary (and – e. g. after a change of transmitter – can be repeated anytime).

On-board voltage display

The current voltage of the receiver’s power supply will be shown in the right side of the transmitter’s screen if a telemetry link exists between the receiver and transmitter:

Receiver initialization

Stp

#01

3.9V

2:22h

Temperature warning

Should the receiver’s temperature sink below an adjustable threshold (default value -10 °C) or rise above an adjustable threshold (default value +55 °C), an acoustic warning will be issued by the transmitter in the form of a uniform beep of about 1 s duration. The aforementioned threshold limits are stored and adjusted in the receiver.

Servo connections and polarity

Graupner/SJ HoTT receiver servo connections are numbered. The connectors used are keyed against polarity reversal. Pay attention to the small side chamfers when plugging in these connectors. Never use force.

The supply voltage is bussed across (i. e. common for) all numbered connections.

The two vertical sockets at the extreme edge of the GR-16 and GR-24 receivers are intended for the battery connection. On the GR-16 these two sockets are marked “1+B-” and “6+B-”. On the GR-24 these two sockets are marked “11+B-” and “12+B-”. However, you can also connect the corresponding servos to these two sockets in parallel with the power supply simply by using a Y-lead, Order No. 3936.11.

Do not reverse the polarity of this connection. Reversed polarity could destroy the receiver and devices attached to it.

The function of every individual channel is determined by the transmitter used, not by the receiver. It is not only the throttle servo connection which is different for every manufacturer and model type. For example, in

Flt

0:00 0:00

HoTT

5.5V

Graupner remote control systems the throttle servo is on channel 1 for winged aircraft and on channel 6 for helicopter models.

Follow the installation instructions on page 64 for the receiver, the receiver antenna and for mounting the servo.

Concluding notices:

• The signiﬁcantly greater servo resolution characteristic of the HoTT system produces a noticeably ﬁrmer response behaviour in comparison to previous technology. Please take the time to familiarize yourself with this sensitive behaviour.

• If you have a speed controller with integrated BEC* arranged in parallel with the receiver battery, its positive pole (red cable) may to be removed from the 3-pole connector. Be sure to look for notices about this in the instructions for the speed controller used.

With a small screwdriver, carefully lift up the connector’s center latch (1) just a bit then pull out the red lead (2) and tape it up with insulation tape to prevent possible short circuits (3).

Reset

To execute a reset of the receiver, press and hold the SET button on the receiver’s top-side while switching the power supply on. Hold the receiver’s SET button pressed in for about three seconds until the LED, ﬂashing slowly red / green, goes out for about two seconds.

If you have carried out the reset with the transmitter switched off, or with an unbound receiver, the green and red LEDs ﬁtted to the GR-16 and GR-24 receivers (supplied as standard in the sets) ﬂash four times for around three seconds, after which both LEDs go

* Battery Elimination Circuit

red

out for just on three seconds, before only the red LED continues to ﬂash. Release the button as soon as the LEDs go out.

At the transmitter and receiver it is now possible to carry out a Binding procedure immediately.

If the reset is done on a bound receiver and the corresponding model memory is active in the powered on transmitter, the LED will illuminate in green after 2 or 3 seconds as an indication that the transmitter/ receiver system is again ready for operation.

Please note the following: A receiver RESET will cause ALL receiver set-

tings, except for binding information, to return to their factory settings.

Therefore if a RESET is triggered unintentionally, any custom settings that had been present in the receiver before the reset will have to be established again by way of the »Telemetry« menu.

A deliberate RESET is recommended, especially if a receiver is to be “transferred” into another model. This is a rather simple method to eliminate settings which are no longer applicable.

55Receiver initialization

Receiver power supply

Among other aspects, the safe operation of a model depends on a reliable power supply. In the event that, despite smooth operating rods, fully charged battery, battery leads with adequate cross-section, minimum contact resistances at connectors, etc., the transmitter indicates repeated receiver voltage collapses or is receiver voltage is generally too low; please give attention to the following notices:

Give primary attention to fully charged batteries when model operation is to be started. Be sure that the contact surfaces of connectors and switches really are low resistance. If necessary, measure the voltage drop across installed switch cables when they are under load because even new heavy-duty switches can cause a voltage drop of up to 0.2 V. This value can increase in contacts by factors as a consequence of aging and oxidation. The constant vibrations and jarring also takes its toll on contacts to produce a creeping increase of contact resistance.

Servos present another possible problem source. Even rather small servos like a Graupner/JR DS-281 can draw up to 0.75 A of current when it is blocks under load. Just four of these servos in a “foam” model can therefore load down the on-board power supply by as much as 3 A …

A further factor is that 2.4 GHz receivers generally pass control signals to servos at a higher rate than with comparable receivers used in earlier frequency ranges. This equates to shorter “off” periods, which also has an effect on the power consumption of the receiving system. The current drain of many of today’s digital servos is also higher, reﬂected by their greatly improved ability to hold the prescribed position between control signals.

Therefore you should choose a power supply which will not break down under greater loads but rather always deliver sufﬁcient voltage. To “calculate” necessary battery capacity you should always ﬁgure on at least 350 mAh for every analog servo and at least

500 mAh for every digital servo. For example, from this point of view a battery with

1400 mAh would be the absolute minimum to power a receiver system with a total of 4 analog servos. But be sure to also consider the receiver itself into the calculation because its bidirectional functionality will draw about 70 mA of current too.

Connect the power supply preferably by way of the socket/s which are close to connectors of attached servos. Where only high-power servos are connected, it may be necessary to use all receiver battery connections. Even where only two batteries are used via 1 PRX it is preferable to use the receiver connections closest to the servos which draw the most current.

The ﬁgure below shows an example of a stabilized receiver power supply (PRX-5A, order no. 4136) for the connection of two batteries. As an alternative solution, a switch could be inserted with power supply cables to two receiver connectors. Such a double connection not only reduces the risks associated with a cable break but also ensures a more uniform supply of power to attached servos.

If a separate battery is connected to each receiver battery connection, be absolutely sure the batteries have the same voltage and power rating. Never connect different battery types or batteries charged to signiﬁcantly different levels to the receiver. This can lead to effects similar to short circuit conditions. In such cases, insert voltage stabilizers, such as the PRX-5A receiver power supply, between the batteries and the receiver.

Auxiliary function

Y-lead, Order No. 3936.11

PRX stabilised receiver power supply, Order No. 4136

Auxiliary function

Y-lead, Order No. 3936.11

PRX stabilised receiver power supply, Order No. 4136

For reasons of safety, do not use battery boxes or dry cell batteries.

The voltage of the on-board power supply will be displayed at the bottom right of the transmitter’s screen while the model is in operation:

0:00 0:00

#01

Stp Flt

HoTT

5.5V

3.9V

2:22h

If the voltage falls below the warning threshold – 3.80 V as standard – set in the “RX SERVO TEST” display of the “SETUP, DISPLAYS” sub-menu of the »Telemetry« menu, page 248, then the system generates a visual and audible low voltage warning.

Despite this feature, be sure to check the condition of the battery at regular intervals. Do not wait for the warning to be issued before recharging the battery.

Note: An overview of available batteries, chargers and current source test instruments can be found in the Graupner RC main catalog or in Internet at www.graupner.de. A selection of suitable Computer chargers are listed in the table on page 16.

Receiver power supply

Receiver system power supply

NiMH 4-cell battery packs

In compliance with the aforementioned conditions, your Graupner/SJ HoTT receiver system can be readily operated with traditional 4-cell battery packs as long as the packs have adequate capacity and voltage level.

NiMH 5-cell battery packs

Five-cell battery packs offer a greater voltage tolerance than do 4-cell packs.

However, be aware that not every servo available on the market is able to tolerate the voltage level output by a 5-cell pack over the long term, this is particularly true when the battery pack is freshly charged. Some of these servos react to this with a noticeable “grinding” sound.

Therefore pay attention to the speciﬁcations of the servos you use before making a choice for a 5-cell battery pack..

LiFe 6.6 V batteries with 2 cells

From a contemporary perspective, these new cells are the very best choice.

LiFe cells are also available in hard plastic casings to protect them from mechanical damage. Like LiPo cells, LiFe cells can be quick charged in suitable chargers and they are comparatively robust.

This type of secondary cell battery is also rated for a signiﬁcantly greater number of charge/discharge cycles than, for example, LiPo batteries The nominal

6.6 V output of a 2-cell LiFe battery pack does not present a problem for either Graupner/SJ HoTT receivers nor for those servos, speed controllers, gyros and other devices which have been speciﬁcally approved for operation in this – higher – voltage range.

Please note however that practically all servos, speed controllers, gyros and other devices built in the past and most such devices currently still offered on the market have only a permissible voltage range of 4.8 to 6 V. Use of these batteries

in conjunction with these devices demand use of a stabilized voltage regulator, e. g. the PRX, Order No. 4136, see appendix. Otherwise there is danger that attached devices will incur damage within a short period of time.

LiPo 2-cell packs

For a given capacity, LiPo batteries are lighter than, for example, NiMH batteries. LiPo batteries are also available in hard plastic casings to protect them from mechanical damage.

The comparatively high nominal voltage, 7.4 V, for a 2-cell LiPo pack does not present a problem for either Graupner/SJ HoTT receivers nor for those servos, speed controllers, gyros and other devices which have been speciﬁcally approved for operation in this – higher – voltage range. Please note however

that practically all servos, speed controllers, gyros and other devices built in the past and most such devices currently still offered on the market have only a permissible voltage range of 4.8 to 6 V. Use of these batteries in conjunction with these

devices demand use of a stabilized voltage regulator, e. g. the PRX, Order No. 4136, see appendix. Otherwise there is danger that attached devices will incur damage within a short period of time.

Charging the receiver battery

Charger cable, order no. 3021, can be plugged directly onto the receiver’s battery for charging. If the battery in the model is connected by way of an order no. 3046, 3934, 3934.1 or 3934.3 power supply cable, then charging can be accomplished via the charging jack or special charging connector integrated into the switch. The switch in the power supply cable must be in its “OFF” position for charging.

Receiver battery

connection polarity

57Receiver power supply

Receiver ﬁrmware updates

Receiver ﬁrmware updates for the GR-16 and GR-24 receivers, which are supplied as standard in the RC sets, are carried out using the side-mounted Telemetry socket marked “- + T” and a PC or laptop running Windows XP, Vista or 7. You will also require the USB leads supplied in the mc-16 HoTT and m c- 20 HoTT sets, together with the USB interface, Order No. 7168.6, and the adapter lead, Order No. 7168.6S, both of which are also included. The programs and ﬁles also needed can be found in Internet on the Graupner website at www.graupner.de under the downloads for the particular product. For more information please read the section entitled “Downloading a ﬁrmware packet” on page 48.

Note: After registering your receiver at https://www.graupner.de/en/service/product_registration.aspx, you will automatically receive notiﬁcation of future updates per email.

Updating receiver ﬁrmware

Important notes:

• Before any update procedure, be sure to check the charged status of the receiver’s battery. If necessary, charge the battery before beginning with an update.

• It is essential not to disconnect the receiver from the PC or laptop during an update process! Please ensure that the lead between the receiver and the computer is making good contact at both ends.

1. Installing drivers

The driver software for the USB interface, Order No. 7168.6, is identical to the driver software for the interface installed in the

mc-16 HoTT and

mc- 2 0 HoTT transmitter. This means that the

driver only needs to be installed once; the procedure is described on page 50.

2. Establishing a receiver / PC connection

Connect the USB interface cable, order no.

7168.6, via the adapter cable, order no. 7168.6A, with the “- + T” connector on the receiver, see illustration. These connectors are protected against polarity reversal so pay attention to the small chamfers on the sides of connectors. Do not use brute force, these connectors should latch in rather easily.

Adapter lead Order No. 7168.6S

If a central red wire is present, cut through t

Adapter lead Order No. 7168.6S

If a central red wire is present, cut through it

Caution: If the – older – adapter cable still has wires for all three poles, cut the red insulated wire for the middle connector pin of the adapter cable, Order No. 7168.6A.

Afterward, connect the USB interface with the included USB cable (USB-A/mini-B-USB 5-pole interface connector) to the PC or laptop. A red LED on the interface board should illuminate even

though the connection is made correctly.

If not already off, now switch the receiver off.

3. Firmware update

Start the “Firmware_Upgrade_grStudio_VerX.X.exe” program by double-clicking on it, exactly as described for updating the transmitter software – see page 50. (At the time of revision for this manual, this program’s current version is 2.1 and it can be started without ﬁrst being installed.)

Move to the “Upgrade” folder, open the “Controller Menu” and click on “Port Select”. (Alternatively select the “Port Select” entry under “Menu”.)

Receiver ﬁrmware updates

Select the correct COM port in the “Port select” window, i. e. the port to which the USB interface is connected. This can be identiﬁed by the label “Silicon Labs CP210x USB to UART Bridge” in the “Device name” column. In the screen-shot shown above this would be the “COM 3” port.

In the “Devices” folder, call up the “HoTT receiver” option under “Controller Menu”. Alternatively select the “HoTT Receiver Upgrade” entry under “Menu”:

When you call up the program, you will see a row of numbers 1 … 5 in the window’s title bar; the number “1” now ﬂashes red to indicate that the program is currently in “[Process Step] 1”.

The meaning of the step which is currently ﬂashing is always displayed immediately below the row of numbers:

at any time to call up Quick Info: this gives a brief explanation of the individual steps:

If you have not already done so, you should now connect your receiver to the PC or laptop. Click on the button marked “File Browse”, and the “Open ﬁle” dialogue opens. Select the ﬁrmware update ﬁle matching your receiver; it will end in a “bin” sufﬁx.

Assuming that you have already downloaded and unpacked the zip ﬁle “HoTT_Software_VX”, the ﬁle you need will usually be located in the folder whose name starts with the Order Number of the receiver you wish to update. If you are using one of the receivers supplied as standard in the RC sets, this would be the folder “33508_08CH_RX”

mc-16) or “33512_12CH_RX” (mc- 20). The

( ﬁle appears in the associated window, and at the same time the “2” starts ﬂashing red:

With the receiver still switched off, follow the direction of “[Process Step] 2” and press the “Start update” button in the “HoTT Receiver Upgrade” window. (The announcement moves to „[Process Step] 3“.) Wait for the progress bar to start. Depending on the speed of the computer being used, this may take several seconds.

Now switch on the receiver while holding its SET button down. After a few seconds the “Found target device …” message will appear in the status display. Release the button again. The actual ﬁrmware update now starts automatically: “11, Start Firmware upgrade …”.

However, if the receiver is not detected, the “Target device ID not found” popup window will appear. If this should happen, check your update arrangement, and re-start the procedure:

For example, this screen-shot shows Step 1 in progress, and the meaning is: “Connect the USB lead to the HoTT receiver”.

Note: You can position the mouse pointer over a number

Note: Firmware ﬁles are product-speciﬁcally coded, i. e. if a wrong ﬁle is accidentally selected which does not correspond to the product (e. g. a transmitter update ﬁle instead of a receiver update ﬁle), the “Product code error” popup window will appear and the update process will not start.

The progress of the ﬁrmware update is shown by the Progress bar in the Status display.

During the update process the red and green LEDs on the GR-16 and GR-24 receivers glow constantly.

The connection to the PC must not be interrupted during the update process!

The update is complete when the progress bar reaches the right-hand end. In the bottom line of

59Receiver ﬁrmware updates

the Status display you will see “12, Complete !!” and at the same time the [Process Steps] display changes to “5”.

When the update process is successfully concluded, the green LED on the receiver goes out, and the red LED starts ﬂashing.

If this process terminates before reaching the 100 % mark, switch off your receiver’s power supply then try to start the update process all over again. Do this by performing the above steps again.

If you accidentally try to transfer ﬁrmware which is older than the version stored in the receiver – even though of the correct type – the program displays a warning:

Click on “No” if you do not want to load an older version of the ﬁrmware, and then load the correct *.bin ﬁle via the “Open ﬁle” button.

After this it is ESSENTIAL to initialise the receiver, i. e. reset it to the factory default values.

ised before it is used again, and the display shown above makes this clear. Hold the SET button on the receiver pressed in while you switch the receiver on: if you are using a GR-16 or GR-24 receiver, as supplied as standard in the RC sets, the green and red LEDs ﬂash four times for about three seconds, then both LEDs go out for three seconds, and ﬁnally the red LED alone continues to ﬂash.

Release the button as soon as the LEDs go out. Switch the transmitter on again, wait until an RF

signal is transmitted, and you will see the green LED on the bound receiver light up continuously for two to three seconds. If the receiver is not yet bound, you can now carry out the binding process with a transmitter; see pages 87 and 95.

Important note: The receiver is now reset to the factory default values – with the exception of the binding information – and any other settings previously programmed in the receiver must be re-entered if required.

If you wish to avoid this process by “rescuing” the data, use the “Receiver Setup” program in the “Link” segment of the program before carrying out the update process. This will save you the trouble of re-programming the receiver via the “Telemetry” menu.

To do this, switch the receiver off and remove the interface cable.

4. Receiver initialization

For safety reasons the receiver must be initial-

Receiver ﬁrmware updates

61For your notes

Backing up receiver settings

The “Receiver Setup” segment of the “Firmware_Upgrade_grStudio” program provides a means of backing up the data programmed in the receiver. The data are saved in a ﬁle on your computer, so that the same data set can be loaded back into the receiver if required; this avoids the need to re-program the settings using the “Telemetry” menu.

It is best to call up the “Receiver Setup” application from within the “Firmware_Upgrade_grStudio” program, but it is also possible to start it directly: you will ﬁnd the “Receiver_Setup.exe” ﬁle in the “Graupner_ PC-Software” folder.

Note: If you call up “Receiver_Setup.exe” from the Firmware_Upgrade program via the “Receiver Setup” menu point, you should check that the sub-program “Receiver_Setup.exe” is located in the same folder as the “Firmware_Upgrade_grStudio” program!

For this program you need a USB lead together with the USB interface, Order No. 7168.6, which is supplied as standard in the radio control sets, and the interface lead, Order No. 7168.6S.

Backing up receiver settings

1. Establishing a connection between the receiver and the PC

With the receiver switched off, connect the USB interface, Order No. 7168.6 to the receiver socket marked “- + T” using the adapter lead, Order No.

Backing up receiver settings

7168.6S. The connectors are polarised; check that the small

side chamfers are correctly aligned. On no account use force; the plugs should slide easily into the sockets.

Adapter lead Order No. 7168.6S

If a central red wire is present, cut through t

Adapter lead Order No. 7168.6S

If a central red wire is present, cut through it

Caution: If you wish to use the earlier adapter lead, Order No. 7168.6A, and it is still ﬁtted with a three-core lead, cut through the central red wire of the adapter lead before using it.

Connect the USB interface to the PC or laptop using the USB lead supplied (USB-A to 5-way mini-B-USB). When connected correctly, a red LED should light up on the interface circuit board.

The receiver must remain switched off.

2. Receiver Setup: selecting the port

Start the “Firmware_Upgrade_grStudio_VerX.X.exe” program by double-clicking on it, exactly as described for updating the transmitter software – see page 50. (Version 2.1, which is the current version at the time this manual was revised, starts without being previously installed.)

Open the “Controller Menu” and click on “Receiver Setup” in the “Upgrade / Link” folder.

Alternatively select the “Receiver Setup entry” un-

der “Menu”:

A program window now appears: the ﬁrst step is to set the “correct” COM port for the USB interface, Order No. 7168.6. If you are not sure of this, check the COM port in the “Port select” window of the “Controller Menu” (see earlier), and note the COM port number associated with the entry “Silicon Labs CP210x USB to UART Bridge”. If everything is as described earlier, this would be the “COM 3” port.

(If you select the wrong port, the program will inform you of your error.)

3. Reading out receiver data

Click on the “Connect” button and wait until the lower Status bar starts moving:

Hold the SET button on the receiver pressed in while you switch it on. After about three seconds the current values stored in the receiver are displayed in the corresponding ﬁelds. If the progress bar is “faster than you are”, and reaches the end before you have switched the receiver on, the popup window shown subsequent will appear.

Repeat the procedure:

Important:

The active connection can be terminated using the “Disconnect” button, but you should only do this if you intend to initialise the receiver directly – as described on page 60 – and do not wish to overwrite the contents with a data set you backed up earlier.

4. Saving receiver data

The “File Save” button stores the current servo conﬁguration on the PC.

The Windows dialogue “Save as” now opens:

First select a suitable folder in which to save the ﬁle, and enter an unambiguous name under “File name”, so that you can assign the ﬁle again at a later stage. The program automatically appends the ﬁle sufﬁx “rdf”. The data set is saved when you click on the “Save” button. When the process is complete, this message appears:

Click on “OK” to close this. Now you can reset the receiver to the factory de-

fault settings as previously mentioned and described on page 60.

Copying a data set to the receiver

The backed-up data can be reloaded using the “File Load” function in the Receiver Setup program.

First connect the receiver as described in point 3 “Reading out receiver data”, and click on the “Connect” button. If the receiver has previously been initialised, the software reads out the factory default settings.

Now select the appropriate “rdf” ﬁle from the appropriate folder, and click on “OK” in the “File Load” pop-up

window. Clicking on the “Write” button transfers the data to the receiver connected to the PC.

As soon as the transfer is complete, the pop-up window “Receiver Data Write Success” appears:

Click on “OK” to conclude the data transfer procedure, then click on the “Disconnect” button to separate the Receiver Setup program from the receiver.

Important notes:

• The “Receiver Setup” program includes additional functions which are still at the development stage, and must not be used at this juncture. You can check the current state of the software in the Download area for your particular receiver.

• A separate manual dealing with the whole “Firmware_Upgrade_grStudio_Ver-X.X” program packet is in preparation, and will be made available in the Download area when it is ready. The manual will then be continuously updated whenever new options become available.

63Backing up receiver settings

Installation notices

Receiver installation

Regardless of which Graupner receiver system you use, the procedure is always the same.

Please pay attention that the receiver’s antennas must be mounted at least 5 cm away from all large metal parts or any wiring that is not directly routed out of the receiver itself. In addition to steel parts, this also includes carbon ﬁber parts, servos, fuel pumps and all kinds of cables etc. Optimally the receiver should be placed at a readily accessible location that is well away from all other equipment. Under no circumstances may servo cables be wrapped around the antennas or routed close to it.

Please note that cables are subject to the acceleration forces which occur during ﬂight and these forces may cause such cables, to shift in position. Therefore be sure the cables in the vicinity of the antennas are not able to move. Such moving cables can cause reception disturbances.

Tests have shown that a single receiver aerial should be deployed in the vertical (upright) orientation for best results during long landing approaches. If your receiver is an aerial diversity type – two aerials – then the active tip of the second aerial should be positioned at 90 ° to the tip of the ﬁrst aerial, and ideally the distance between the two tips should be greater than 125 mm.

If your model features a carbon ﬁbre fuselage, the aerial tips must always extend outside the fuselage for a length of at least 35 mm. If this is not possible, it is essential to substitute longer aerials (300 mm, Order No. 33500.2, or 450 mm, Order No. 33500.3) for the standard ones (approx. 145 mm long) ﬁtted to HoTT receiver(s).

The sockets marked “X+B-” on the HoTT GR-16 and GR-24 receivers supplied in the sets are intended for the battery connection. The power supply is passed through all the numbered sockets, and in principle the battery can be connected to any of the eight (or

Installation notices

twelve) sockets. A Y-lead can then be used to connect the corresponding servo.

However, please note that the transverse sockets of the GR-12 should not be used for the connection of a receiver battery due to additional voltage losses.

The function of every individual channel is determined by the transmitter used, not by the receiver. However, channel assignments can be changed in the receiver by programming done in the »Tele metry« menu. However, it is advisable to carry this out at the transmitter using the »Tx. output swap« option; this is available as standard on the mitter, but has to be unlocked (at extra cost) on the

mc- 2 0 HoTT trans-

mc-16 HoTT transmitter; see page 230.

Several notices and suggestions for installing remote control components into a model are provided below.

1. Wrap the receiver in a foam rubber pad that is at least 6 mm thick. Attach the foam rubber to the receiver with rubber bands so it will be protected against vibration and/or the jars of a hard landing. However, do not enclose your receiver completely, otherwise it may overheat in use.

2. All switches must be installed such that they are not affected by exhaust gases or vibration. The switch knob must be freely accessible over its entire range of movement.

3. Mount servos on rubber bushes/spacers with hollow brass bearings to protect them from vibration. Do not tighten the fastening screws down too tight as this would negate the vibration protection to be provided by the rubber bush/spacer. Only when servo fastening screws are properly tightened will this arrangement provide security and vibration protection for your servos. The ﬁgure below shows how a servo is mounted properly. The brass bearings are to be pushed into the rubber bushes/ spacers from below.

Servo mounting lug

Retaining screw

Rubber grommet

Tubular brass spacer

4. Servo arms must be free to move throughout their entire range of motion. Pay attention that there are no objects which could hinder servo arm motion.

The sequence in which servos are connected to the receiver depends on the type of model. Follow the connection layouts provided for this on pages 73 and 75.

Also observe the safety notices provided on pages 4 … 9.

In order to prevent uncontrolled movements of servos connected to the receiver during startup

always ﬁrst switch on the transmitter

and then the receiver

and when ﬁnished with operation

ﬁrst switch off the receiver

and then the transmitter.

When programming the transmitter, be sure that electric motors cannot start running without control or that a combustion motor equipped with automatic starting cannot start up unintentionally. To be safe, disconnect the receiver’s drive battery or, in the case of a combustion motor, disconnect the fuel supply.

65For your notes

Deﬁnitions of terms

Control function, control, function input, control channel, mixer, kind of switches

To make use of this manual easier, a number of the terms used repeatedly throughout this manual have been deﬁned below.

Control function

A “control function” is to be perceived – initially independent of its signal path – as a signal intended to affect a given control function. For example, this could be for throttle, rudder or aileron in a winged aircraft or pitch, roll or crow for a helicopter.

A control function signal can be applied directly over a single control channel or also through a mixer and then applied over multiple control channels. A typical example of multiple control channels is separately operated aileron servos or the use of two roll or crow servos in helicopters. The control function explicitly includes the inﬂuence of the control’s mechanical travel on the respective servo. This can not only be spread or compressed by software but even the travel characteristic can be modiﬁed from linear to extremely exponential.

Control

“Controls” include all operating elements on the transmitter, which are directly activated by the pilot, that impose an effect on servos, speed controllers etc. connected to the receiver. This includes:

• both sticks for control functions 1 through 4, whereby these four functions can be freely swapped around for both model types (“winged aircraft” and “helicopters”) by way of software “Mode” settings, e. g. throttle left or right. The stick function for throttle/airbrake control at “winged aircraft” or throttle/pitch control at “helicopters” is often also referred to as the C1 control (channel

1).

• both proportional controls located on the transmitter’s sides, which are, for example, given the de signations Lv1 (left-side “rotary slider”) and Lv2 (right-side “rotary slider”) in the »Control adjust«

Term deﬁnitions

menu, page 118 and 122.

• the two INC/DEC buttons, which are ﬁtted on both sides of the front screen on the transmitter only. These are typically labelled Cn5 and 6 in the »Control adjust« menu; see sections starting on page 118 and 122.

If they are assigned as transmitter controls in the »Control adjust« menu, these buttons can be used to move a servo in 1 % increments relative to the servo travel currently set (as selected in the »Servo adjustment« menu.) When you press one of the INC/DEC buttons, the positions are brieﬂy superimposed on the base display.

They are ideal for tasks such as setting ﬂight phase speciﬁc ﬂap positions and similar ﬁne trimming. If a button is held pressed in, the rate of change automatically speeds up – indicated by a faster sequence of audible beeps; a different beep indicates the centre position. Since you can opt for the (trim) position of these two transmitter controls to be stored separately for each ﬂight phase – provided that they have been assigned to one of the inputs 5 … 12 in the “Control adjust” menu – you can use one and the same INC/DEC button in the same way for all ﬂight phases you may have programmed. This does not apply to position-dependent proportional transmitter controls.

• the two proportional sliders in the middle console designated Sl1 and 2, for example as shown in the »Control adjust« menu, page 118 and 122,

• the switches present, if they are assigned to a control channel in the »Control adjust« menu.

The proportional operating elements produce a direct effect on servos which is commensurate with the control’s position whereas switch modules can only effect a two or three increment change.

Just which of these controls and switches operate which of the servos 5 … 8 respectively 5 … 12 is freely programmable.

mc- 2 0 HoTT

Important notice: The transmitter is supplied with default programming in which certain inputs are “free”, i. e. not yet assigned to any function. These inputs are: 5 … 7 (mc-16) and 5 … 11 (mc- 2 0 only as standard) for model helicopters, and 5 … 8 (mc-16) and 5 … 12 (mc- 2 0 only as standard) for ﬁxed-wing model aircraft.

Function input

This is an imaginary point in the signal path and must not be considered the same as the point on the circuit board where the transmitter control is connected. The choice of “Stick mode” and settings in the »Con- trol adjust« menu have their effect “downstream” of these imaginary connection points. Thus differences between the physical control’s number and the number of the downstream control channel can indeed emerge.

Control channel

From the point at which a signal contains all control information necessary for a particular servo – whether directly from the physical control or indirectly by way of a mixer – the term “control channel” is used.

(For example, for a ﬁxed-wing model aircraft set up as the model type “2AIL”, this means that the “Aileron” control function is divided into the control channels left and right aileron. Similarly: for a helicopter set up as the “3Sv(2roll)” type, the “Roll” control function is split into the control channels left and right roll servo.)

The signal of this type of control channel can only be further inﬂuenced by the settings entered in the »Servo adjustment« menu (and in the »Tx. output swap« menu, which is available in the HoTT transmitter only, but can be unlocked in the

mc- 2 0

mc-16 HoTT transmitter); the signal then leaves the

transmitter via the RF module. Once it arrives at the receiver, this signal may still be

modiﬁed by settings made in the »Telemetry« menu

before ﬁnally being applied as a control quantity for the respective servo.

ing advantage of the programming examples beginning on page 280.

Mixer

The transmitter’s software contains a variety of mixer functions. These can be used to apply one control function to multiple servos or, conversely, to apply multiple control functions to a single servo. Please look over the numerous mixer functions in the text beginning on page 169 of this manual.

Switches

The standard toggle switches, the 3-way switches and both push-button switches can also be incorporated into control programming. However, these switches are generally intended for switching program options, e. g. to start and stop timers, to switch mixers on and off, or as a teacher/pupil switchover, etc. Each of these switches can be assigned any number of functions.

Appropriate examples are detailed in the manual.

Control switches

Since it is very practical to have some functions automatically switched on or off for a certain control’s position (e. g. switch on/off of a stopwatch for acquisition of model run time, automatic extension of spoilers and other possibilities), four control switches have been integrated into HoTT software.

These software switches, designated “C1 … C4”, are merely deﬁned by virtue of their contact state along the physical control’s course of travel by the touch of a key. The switching action can be correlated to the physical control’s travel direction by software.

Of course control switches can also be freely combined with the aforementioned physical switches to solve even more complex problems.

There is a series of instructive examples which make this programming child’s play. Learn about this by tak-

mc-16 HoTT and m c- 20

Logical switches

This function, which is available as standard on the

mc- 2 0 transmitter only, allows two switches, con-

trol switches and / or logical switches, or any combination of the above, to be linked in an “AND” or “OR” circuit. Eight logical switches “L1 … L8” can be programmed in total; see page 148.

Fixed switches FXI and FX

This type of switch turns a function, e. g. a timer, permanently on (closed ﬁxed switch) or off (open ﬁxed switch) or they can provide a ﬁxed input signal for a control function, e. g. FXI = +100 % and FX = -100 %. For example, in ﬂight phase programming, these ﬁxed switches can be used to switch a servo or speed controller between two settings.

67Term deﬁnitions

Physical control, switch and control switch assignments

Principle procedure

Maximum ﬂexibility is offered by the mc-16 Hott and

mc- 2 0 HoTT system when it comes to assigning

standard equipment operating elements to certain functions.

Since the assignment of controls and switches is done in the same way, even though different menus may be involved, it is appropriate at this point to explain the fundamental programming technique so that users can concentrate on the particular contents when reading the detailed menu descriptions.

Transmitter control assignment

It is possible to assign any direction of transmitter control (Ch1 … Ch4), and also any available transmitter control, to inputs 5 … 8 ( 12 (mc- 2 0 only as standard) at the transmitter, in order to operate servos. This is carried out in the third column of the »Control adjust« menu; see the sections starting on pages 118 and 122. When you press the central SET button of the right-hand touchkey the following window appears on the screen:

Move desired control adj.

Now simply operate the transmitter control you wish to use.

Note: The software only detects the transmitter control after it has moved a certain distance: move it left or right, or forward or back, until the assignment is displayed on the screen. If the travel in one direction is not sufﬁcient, move the control in the opposite direction.

The same method is used throughout the other menus when transmitter controls have to be assigned.

Switch assignment

Wherever programming permits a switch to be assigned, a switch symbol will appear in the screen’s bottom display line:

Physical control, switch and control switch assignments

mc-16) and 5 …

Use the selection keys in the left or right four-way button to select the appropriate column.

How to assign a switch

1. Brieﬂy touch the SET key of the right four-way button. The message shown below will appear in the screen.

Move desired switch to ON position (ext. switch: SET)

2. Now it is only necessary to put the selected switch into the desired “ON” position or, as described at the right in “Assignment of external switches”, to select a switch from the list of “External switches”. This concludes the assignment. The switch symbol to the right of the switch’s number indicates the current state of the particular switch.

Special features of SW 16 + 17 / SW 18 + 19

These two “push-buttons” are ﬁtted in line with the side-mounted proportional sliders on the back of the

mc- 2 0 HoTT transmitter only, and can be assigned

to operate in either of two ways:

• Change-over On / Off switch “SW 16” or “SW 17”, i. e. the switched state (“on” or “off”) changes every time you press the button brieﬂy.

• Momentary switch (push-button) “SW 18” and “SW 19”, i. e. the switch only remains ON for as long as the button is held pressed.

Important note: When the transmitter is switched on, the switches “SW 16” and “SW 17” are always set to the “OFF” position by default.

Changing switch action

If the activation of a switch is to result in the opposite action, put the switch or stick in the desired OFF position, again activate the switch assignment and reassign the switch again so it will respond with the desired action.

Clear switch

A switch which has been assigned as described under point 1 can be cleared with a brief simultaneous tap on the  or  key combination in the right four-way button (CLEAR).

Assignment from the “external switch” list

Those menus in which the message …

Move desired switch to ON position (ext. switch: SET)

… appears permit the assignment of switches belonging to the so-called “external switches”.

Do this by conﬁrming the message text with the SET key. A new window will appear with a list of the four control switches “C1 … C4”, followed by two so-called “FX” ﬁxed switches and the eight logical switches “L1 … L8”.

Control/Logic/fix sw

C2 C3 C4 FX

FXi L1 L2 L3 L4

Use the selection keys in the left or right four-way button to select the desired switch then assign it with a brief tap on the center SET key of the right four-way button.

Notes:

• Switching for some special functions may be better implemented from a certain freely programmable control position rather than switching them manually with a normal switch.

To this end, there are a total of 4 so-called “control switches”, C1 … C4, available whose switching direction can be established, even inverted, in the »Control switch« menu, page 145.

• Logical switches, which are available as standard on the locked on the mc-16 HoTT at extra cost) allow two switches and / or control switches to be linked together logically in an “AND” or “OR” circuit. See the “Logical switches” menu on page 148. A total of 8 logical switches “L1 … L8” (as well as another 8 inverted logical switches with inverted switching direction) are available.

The result of a logical switch function can also be used as an input for another logical switch function. Refer to the appropriate menu for more details about this.

• The two FX switches switch a function on “FXI” or off “FX

• All switches mentioned can have multiple assignments. Pay attention that you do not UNINTENTIONALLY assign reciprocally conﬂicting functions to a single switch. If necessary, note down the given switch functions.

Typical applications:

• Shut-off of an on-board glow plug heater upon underrun or overrun of an idle threshold point programmed for the C1 stick. In this case the glow plug heater switch is controlled by a transmitter mixer.

• Automatic switch on/off of the timer to measure pure “ﬂight time” for a helicopter by way of a control switch on the throttle limiter.

• Automatic switch off of the “AI  Rud” mixer when brake ﬂaps are extended, for example to adapt the roll of a model to the ground when making a landing on a slope without inducing a change of ﬂight direction due to inﬂuence on the rudder.

mc- 2 0 transmitter only (but can be un-

” permanently.

• Extending landing ﬂaps with elevator trim adjustment during a landing as soon as the throttle stick is moved beyond its switch point.

• Switch on/off of the timer for measuring the operating time of electric motors.

69Physical control, switch and control switch assignments

Digital trim

Functional description and description of C1 cut-off

Digital trim with visible and audible indicators

Both sticks are equipped for digital trimming. When you give the trim lever a brief push (one „click“), the neutral position of the associated stick channel changes by one increment. If you hold the trim lever in one direction, the trim value changes continuously in the corresponding direction with increasing speed.

These changes can be made „audible“ by way of different frequency tones. This makes ﬁnding the midpoint during ﬂight easy, without looking at the screen. When the midpoint is overrun, a brief pause will be inserted.

Current trim values are automatically stored when a model memory change is made. Furthermore, digital trim exercises ﬂight phase speciﬁc control within a memory location (except for throttle/brake ﬂaps trim) – the socalled „C1“ (channel 1) control function. These default settings can be altered to “global” in the »Stick mode« menu, which is available as standard on the

mc- 2 0 HoTT transmitter only, see pages

114 and 116. This C1 trim includes yet another special function for

winged aircraft and helicopter models, it allows the carburetor‘s idle setting to easily be found for a combustion motor.

Since the trim functions described in these instructions are only effective in the direction „Motor off“, the presentation in the screen of your transmitter may only change with respect to individual throttle or Pitch-min positioning of the C1 stick in the „forward“ or „back“ direction, such as throttle/pitch „left stick“ or „right stick“.

The illustrations in these instructions are always based on „Throttle/Pitch right“ for both types of models and „Throttle back“ for winged aircraft and helicopters.

1. Winged models

C1 trimming has a special cut-off trim function intended especially for combustion motors. This cut-off trim function is conﬁgured as follows: First put the motor into a safe idle speed.

Now if you push C1 trim in a single motion toward its „Motor cut-off“ direction until it is in its furthest travel position then an additional end-position marker will remain in the display. When the motor is restarted you can again immediately set the last idle speed with a single movement in the direction of „more gas“.

Last idle position

Current trim position

Ch 1 trim lever

stp flt

Idle direction

Trim at motor OFF position

This cut-off trim will be deactivated when “None” is entered on the “Motor at C1” line of the »Model type« menu, see page 104.

Notice: Since this trim function is only effective in the “Motor off” direction, the display illustrated above will change appropriately if the C1 stick’s control direction for minimum throttle is changed from “back” to “front” (on which the above illustration is based) in the “Motor at C1” line of the “Basic Settings” menu.

2. Helicopter models

In addition to the „Cut-off trim“ function described below in „Winged aircraft models“, C1 trimming also has another characteristic which is made possible by combining it with a so-called „Throttle limit“ function see page 127. As long as the throttle limit control – as standard the right-hand proportional rotary control Lv2 on the right-hand side of the transmitter – remains in the „rear“ half of its travel path, i. e. in the startup range, C1 trimming acts on the throttle servo as idle trim and the indication for idle trim is visible in the screen‘s display:

Current trim position

stop flt

Last idle position

Throttle limit control

Trim at motor OFF position

However, in contrast to winged aircraft models, the position indicator ( ) will be hidden and any preset idle position will be deleted when the throttle limit control is in the „front-side“ half of its travel path.

Stp

Throttle limit control

Flt

Notice for helicopters: C1 trimming affects only the throttle servo, not the pitch servo. Notice also that the helicopter throttle servo must be connected to receiver output 6, see receiver layout on page 75!

Digital trim

71For your notes

Winged models

Convenient support is provided for up to four aileron servos and four ﬂap servos on normal models or, for V-tail and ﬂying wing/delta models, up to two aileron/ elevator servos plus four ﬂap servos.

The majority of motorized and glider models belong to the tail unit type “normal” and are equipped with one servo each for elevator, rudder and ailerons in addition to a motor throttle or electronic speed controller (or for brake ﬂaps in the case of a glider model). Beyond this, tail unit type “2 HR Sv 3+8” permits the connection of two elevator servos to receiver outputs 3 and 8.

“V-tail” is to be selected from the »Model type« menu if the model has a V-tail instead of a “normal” tail. This V-tail option provides coupled control functions for elevator and rudder such that both tail ﬂaps – each controlled by a separate servo – are able to handle both elevator and rudder functionality.

For delta and ﬂying wing aircraft models, aileron and elevator functionality is affected by way of a common rudder ﬂap on the trailing edge of each side (right and left) of the wing. The program contains appropriate mixer functions for both servos.

If ailerons, and conditionally the ﬂaps, are each actuated with two separate servos then settings can be made for differentiated control of all aileron and ﬂap pairs in the »Wing mixers« menu, i. e. settings for downward rudder throw independent of upward throw. And ﬁnally, the ideal method of controlling ﬂap positions is to use one of the two INC/DEC transmitter controls, which are ﬁtted as standard on the

mc- 2 0

HoTT transmitter only. Alternatively, there is a phase-dependent trim func-

tion available for ﬂaps, ailerons and elevators in the »Phase trim« menu.

Up to 7 ﬂight phases can be programmed into each of the 20 respectively 24 model memory locations.

Except for C1 trim, digital trim will be stored on a ﬂight-phase basis. C1 trim permits easy location of a carburetor idle setting.

Two timers are always available for ﬂight operation. The transmitter operating time expired since the last battery charge is also displayed.

All transmitter controls and switches can be assigned in the »Control adjust« menu to inputs 5 … 8 respectively 5 … 12 with almost no restrictions.

ons, rudder and elevators are separately programmable and each are convertible between the two variations on a speciﬁc ﬂight-phase basis.

In addition to eight freely assignable linear mixers, four curve mixers (»Free mixers« menu) and four dual mixers (»Dual mixers« – available as standard on the

mc- 2 0 HoTT transmitter only; can be un-

locked on the mc-16 HoTT as an extra-cost option), ﬂight-phase speciﬁc six-point curves are available for control channel 1 (throttle / brake); see »Channel 1 curve« menu.

Depending on the number of wing servos, ﬁxeddeﬁnition mix and coupling functions can be selected from a list in the »Wing mixers« menu.

• Multi-ﬂap menu: control of ﬂaps as ailerons, the inﬂuence aileron trim on ﬂaps controlled as ailerons, ﬂap differentiation, ﬂap function throw magnitude for all aileron and ﬂap pairs, ailerons controlled as ﬂaps, elevator mixer  ﬂaps

• Brake settings: butterﬂy, differential reduction, elevator curves

• aileron  rudder mixer

• ﬂaps  elevator mixer

The “Dual Rate” and “Exponential” functions for ailer-

AI, AI2

Brake

Brake Brake

FL, FL2 Elevator

Winged models

Airbrake-Function 1

right

left

Airbrake Airbrake

Flap Elevator

Rudder/Elevator

left

V-Tail

right

AI2





FL2





RU  AI

EL  AI



AI2



Installation notices Servos MUST be connected to the receiver in the

sequence illustrated here.

Outputs which are not used are simply left empty.

Also be sure to follow the notices on the next pages.

Winged aircraft with and without motor having up to 4 aileron servos and up to 4 ﬂap servos …

… and tail plane type “normal” or “2 elevator servos”

Free or right flap 2 or aux. function Free or left flap 2 or aux. function Free or 2nd elevator or aux. function

Free or right aileron 2 or aux. function

Receiver power supply

Right flap or free or aux. function Flap or left flap Right aileron or aux. function

Rudder

Elevator or 1st elevator Aileron or left aileron Airbrake or throttle servo or speed controller (electric motor)

Receiver power supply Free or left aileron 2 or aux. function

… and tail plane type “V tail unit”

Free or right flap 2 or aux. function Free or left flap 2 or aux. function Free or aux. function

Free or aux. function Receiver power supply

Right flap or free or aux. function Flap or left flap Right aileron or aux. function Right rudder / elevator Left rudder / elevator Aileron or left aileron Airbrake or throttle servo or speed controller (electric motor)

Receiver power supply Free or aux. function

Delta/ﬂying wing aircraft models with and without motor having up to 4 aileron/elevator servos and up to 4 ﬂap/elevator servos

Free or aux. function or right flap 2 / elevator Free or aux. function or left flap 2 / elevator

Free or aux. function

Free or aux. function Receiver power supply

Free or right flap / elevator Free or left flap / elevator

Free or aux. function

Free or rudder Right elevon Left elevon Airbrake or throttle servo or speed controller (electric motor)

Receiver power supply Free or aux. function

Because of orientation differences for installed servos and their rudder linkages, the actuating direction of some servos may be initially backward. The table below provides remedies.

Model

type

V tail Rudder and

Delta, ﬂying wing

Servo

direction

wrong

elevator reversed

Rudder correct, elevators reversed

Elevators correct, rudder reversed

Elevator and aileron reversed

Elevator correct, aileron reversed

Aileron correct, elevators reversed

Remedy

Reverse polarity of servos 3 & 4 in the »Servo adjustment« menu

Swap servos 3 & 4 on the receiver

Reverse polarity of servos 3 & 4 in the »Servo adjustment« menu AND swap them on the receiver

Reverse the polarity of servos 2 & 3 in the »Servo adjustment« menu

Reverse polarity of servos 2 & 3 in the »Servo adjustment« menu AND swap them on the receiver

Swap servos 2 & 3 on the receiver

All “program descriptions” for menus relevant to a winged aircraft model are marked with a winged aircraft symbol …

… so only these menus need to be dealt with to pro-

gram a winged aircraft model.

73Winged models - Receiver layout

Helicopter models

The advanced developments incorporated into the transmitter as well as those now in helicopter models and their components like gyros, speed regulators, rotor blades, etc. make it possible to master a helicopter even in 3D acrobatic ﬂight. On the other hand, a beginner needs only a few settings to get started with hovered ﬂight training then, step-by-step, take advantage of HoTT transmitter features with increasing expertise.

All current model helicopters with one to four collective pitch servos can be operated using the programs provided by the

mc-16 HoTT and m c- 20 HoTT.

Six ﬂight phases plus autorotation are available within a model memory, see menus »Control adjust«, »Phase settings« and »Phase assignment«.

As with winged aircraft, here too, in addition to the basic screen’s standard timers there are additional timers as well as a lap counter with ﬂight-phasedependent stopwatch functionality which are available for selection (menus »Timers (general)« and »Fl. phase timers«).

Depending on the transmitter, it is possible to store the digital trims in “ﬂight phase speciﬁc” or “global” form – for all ﬂight phases; this does not apply to collective pitch / throttle trim. C1 trim permits easy location of an idle setting.

The control assignments for inputs 5 … 8 respectively 5 … 12 is made separately for each ﬂight phase (»Control adjust« menu).

A ﬂight phase copy function is helpful during ﬂight trials (»Copy / Erase« menu).

“Dual Rate” and “Exponential” functions can be coupled for roll, nick and tail rotor and programmable in two variations in every ﬂight phase.

There are 8 freely assignable linear mixers. There are also 4 curve mixers that can be programed and these can also be switched on or off, depending on the ﬂight phase, in the »MIX active/phase« menu. Four dual mixers are also available (»Dual mixers« menu, provided as standard on the

mc- 2 0 HoTT transmit-

ter only, but can be unlocked as an extra-cost option in the mc-16 HoTT transmitter).

The »Helicopter mixer« menu provides ﬂight-phasedependent 6-point curves for the non-linear characteristics pitch, throttle and tail rotor mixer as well as two independent swashplate mixers each for roll and nick. Independent of this, the control curve of the channel 1 stick can be deﬁned with up to a total of 6 points in every ﬂight phase. The beginner will initially only adapt the hover ﬂight point to the control middle for the non-linear characteristics.

Collective

Pitch Curve

Pre-programmed mixers in the »Helicopter mixer« menu:

1. Pitch curve (6-point curve)

2. C1  throttle (6-point curve)

3. Channel 1  tail rotor (6-point curve)

4. Tail rotor  throttle

5. Roll  throttle

6. Roll  tail rotor

7. Pitch-axis  throttle

8. Pitch-axis  tail rotor

9. Gyro suppression

10. Swashplate rotation

11. Swashplate limiter

The “Throttle limit” function (input “Lim.” in the »Con- trol adjust« menu) allows the motor to be started in any ﬂight phase. The right-side proportional rotary slider is assigned to input “Lim.” by default. This “throttle limiter” establishes – depending on its given position – the maximum possible throttle servo position. This makes it possible for the motor to be controlled in the idle range, if necessary even by the proportional regulator. The throttle curves become effective only when the proportional regulator is pushed toward the full throttle direction.

Swashplate

Rotation

Roll

Throttle

Roll

Tail Rotor Pitch-Axis Channel 1

Tail Rotor

Helicopter models

Pitch-Axis Channel 1

Notice for those transitioning from older Graupner systems:

In comparison to previous receiver layouts, servo connector 1 (pitch servo) and servo connector 6 (throttle servo) have exchanged places.

Installation notices Servos MUST be connected to the receiver in the

sequence illustrated here.

Outputs which are not used are simply left empty. For more detailed information on each swashplate

type please refer to the »Helicopter type« menu, described on page 108.

Also be sure to follow the notices on the next pages.

Note: A speed control is also to be connected to receiver output “6” in order to take full advantage of the throttle limiter’s convenience and safety features. See page 193 about this.

Receiver allocation for helicopter models with 1 to 3 swashplate servos

Free or aux. function Free or aux. function Free or speed governor or aux. function

Free or aux. function

Receiver power supply

Gyro gain Throttle servo or speed controller Free or aux. function Tail rotor servo (gyro system) Pitch-axis 1 servo Roll 1 servo Collective pitch or roll 2 or Pitch-axis 2 servo

Receiver power supply

Receiver allocation for helicopter models with 4 swashplate servos

Free or aux. function Free or aux. function

Free or speed governor or aux. function

Free or aux. function

Receiver power supply

Gyro gain Throttle servo or speed controller

Pitch-axis 2 servo Tail rotor servo (gyro system) Pitch-axis 1 servo Roll 1 servo Roll 2 servo

Receiver power supply Free or aux. function

All menus relevant to helicopter models are marked in the „program descriptions“ section with a helicopter symbol …

… so only these menus need to be dealt with to program a helicopter model.

Free or aux. function

75Helicopters - Receiver layout

Detail program description

Loading a new memory location

Anyone who has worked through to this part of the manual has certainly already tried out a bit of programming. Nevertheless a detailed description of every menu should not be left out.

This section begins with the loading of a “free” memory location, a procedure which would be performed if a new model was being “programmed”:

0:00 0:00

HoTT

0.0V

#01

0:00h

Stp Flt

4.1V M

From the basic display, a jump to the “Multi-function list” is made with a tap on the center SET key of the right four-way button. (The center ESC key of the left four-way button will cause a jump back to the basic display.) By default, when the multi-function list is called for the ﬁrst time after switching on the transmitter, the »Model select« menu option will be active and displayed in inverse video. Otherwise use the  or  selection keys of the left or right four-way button to select the »Model select« menu option, whereby the upper of the two following ﬁgures shows a selection list for a ﬁxed-wing model and the lower shows the selection list for a helicopter model.

Model select

Copy / Erase Suppress menus Suppress models Base setup model Model type

Model select

Copy / Erase Suppress menus Suppress models Base setup model Helicopter type

Tap brieﬂy on the center SET key of the right four-way button to open this menu option:

02 03 04 05 06

    

free free free free free

    

R12

In the transmitter’s delivered state, the ﬁrst model memory is initialized to the “ﬁxed-wing model” type and the receiver in the delivery is “bound” to this model. This is indicated by the pictogram of a ﬁxedwing model aircraft in the second column from left, and the receiver identiﬁcation displayed at far right; in the example above this is R12. If the model memory is not “bound”, you will see “---” instead of the receiver identiﬁcation.

The remaining memory locations, marked with “free”, are still unoccupied and therefore also “non-bound”.

If you wish to program a ﬁxed-wing model then, after leaving the »Model select« menu with a tap on the center ESC key of the left four-way button, programming of the model can begin right away … or now use the  or  keys of the left or right four-way button to select one of the free memory locations …

03 04 05 06



   

free

free free free free



   

R12

… and then tap on the center SET key of the right four-way button to conﬁrm the choice.

Afterward you will be prompted to select the basic model type, i. e. either “winged model” or “helicopter model”:

Select model type

Use the  or  keys of the left or right four-way button to select the basic model type then tap on the center SET key of the right four-way button. This initializes the selected model memory with the selected model type and the display will return to the base screen. The memory location is now accordingly occupied.

Changing over to another model type is still possible if you ﬁrst erase this memory location (»Copy / Erase« menu, page 80).

Notes:

• If the currently active model memory is to be erased then immediately after the erase action one of the two model types, “Winged” or “Heli” must be deﬁned. You cannot avoid this selection even if you switch the transmitter off. Only afterward the undesired occupation of that model memory erase from another memory location.

If a non-active memory location is erased, it will

Program description - Loading a new memory location

subsequently be marked as “free” in the “Model select” menu.

• After the selected model memory is initialized with the desired model type, the display will switch to the base screen of the freshly occupied model memory. At this time the warning …

BIND. N/A

… will appear for several seconds as notiﬁcation that a binding connection to a receiver is “not available”. A brief tap on the center SET key of the right four-way button will cause a direct jump to the appropriate option:

Base setup model Mod.name Stick mode module DSC Output PPM10

HoTT

n/a

BD1

n/a

BD2

Further details about binding a receiver can be found on page 87 or 95.

• The “BIND n/a” warning closes automatically, after which the following warning also appears for a few seconds …

Fail Safe setup t.b.d.

… will appear (also for just a few seconds) to indicate that no fail safe settings have yet been made. More about this can be found on page 220.

• If the screen should display the warning …

Thr too high!

… then move the throttle stick, or the limiter for a

helicopter, (by default this is the right-side rotary slider Lv2) into its idle position.

Whether or not this warning appears also depends on the settings selected for the “Motor on C1” and “Pitch min.” options in the »Model type« menu, see page 104, or »Helicopter type« menu, see page 108. For winged aircraft models, select “None” to deactivate this message if you have no motor to enter.

• If the transmitter already has occupied model memories then sub-menus of the »Copy / Erase« menu will display a pictograph of the selected model type at the respective memory location followed by a blank line or the model name which was entered in the »Basic settings, mod- el« menu, page 86 or 94.

• If battery voltage is too low, the model switchover cannot be made due to reasons of safety. An appropriate message will appear in the screen:

not possible now voltage too low

As a basic principle, there are four different ways to assign the four control functions, aileron, elevator, rudder and throttle or brake ﬂaps for winged models as well as rolling, pitching, tail rotor and throttle/pitch for helicopter models, to the two sticks. Just which of these methods is used depends on the preferences of the individual model pilot. This function is set for the currently active model memory in the “Stick mode” line of the »Basic settings, model« menu, page 86 or 94:

Base setup model Mod.name Stick mode module

HoTT

n/a

DSC Output PPM10

BD1

BD2

If this setting is desired as a default for future models, the setting can also be entered into the »General basic settings« menu, page 269:

Basic settings Own Stick mode

1 Modulation HoTT DSC Output

PPM10

SEL

It should be noted here once again that, in the interest of greatest ﬂexibility in combination with the prevention of unintentional operating errors, no controls are preassigned to control channels 5 … 8 respectively 5 … 12 by default.

This means that, in the system’s delivered state, only servos attached to receiver outputs 1 … 4 can typically be operated by the two sticks and that any servos attached to receiver connectors 5 … max. 12 will remain in their middle positions.

A newly initialized helicopter model is also able to more-or-less move servo 6 – depending on the position of the right-side proportional rotary slider, which is the default throttle limiter control. With either model type, this situation will only change after appropriate assignments have been made in the »Control ad- just« menu.

On the other hand, if a newly initialized model memory is to be put into operation then it MUST ﬁrst be appropriately “connected” with one or more receivers before the servos attached to the receiver/s can be operated. More about this can be found in the section “Binding” on page 87 or 95.

A fundamental description of programming steps for a winged aircraft model can be found in the programming examples section beginning on 280, or for helicopter models beginning on page 318.

The menu descriptions below are arranged in the sequence individual menus are listed in the multi-

77Program description - Loading a new memory location

function list. However, since the

mc-16 HoTT and

mc- 2 0 HoTT transmitter types covered by this

manual differ in their software structure as well as their hardware features, these instructions always indicate the “soft” differences between the individual transmitter types at the start of a menu description, as they are in the Contents. The key is as follows:

16 20

 

Key:

16 applicable to mc-16 HoTT 20 applicable to mc- 2 0 HoTT

 standard option  can be unlocked as an extra-cost option

Program description - Loading a new memory location

Model select

Call up model 1 … 20 (mc-16) or 1 … 24 (m c-20)

16 20

 

29 and, on the previous double-page, explanations were provided for navigating to the multi-function list and about how to make allocations for a new model memory. At this point we now wish to begin with the “normal” description of individual menu items in the sequence they are arranged in the transmitter. Therefore we will begin with the menu …

Model select

As many as 20 respectively 24 complete model settings, including digital trim values for the trim buttons, can be stored. Trimming is stored automatically such that a switchover from one model to another does not cause a loss of current trim settings. To the right of the model number, each occupied model memory line in this display shows a pictograph of the model type as well as the model’s name entered for the model in its »Basic settings, model« menu, page 86 or

94. The code, if present, for the receiver “bound” to the model memory location will appear in right the line.

This option is available as standard on both transmitter types.

The basic operation of the transmitters keys was explained on pages 28 and

Model select

Copy / Erase Suppress menus Suppress models Base setup model Model type

Model select

Copy / Erase Suppress menus Suppress models Base setup model Helicopter type

Select the »Model select« menu with the selection keys of the left or right four-way button then brieﬂy tap on the SET key of the right four-way button.

Attention!

Switch-OFF

the Receiver first!

If this message appears, there is a telemetry connection to an operationally ready receiver system. Switch that receiver system off:

03 04 05 06

Now, with the  selection keys of the left or right four-way button, select the desired model memory from the list and activate it with a tap on the SET key. A tap on the ESC key will cause a return to the previous menu page without activating a model change.

Notes:

• If, after a model change, the “Throttle too high” warning appears, the throttle/pitch stick (C1) or the throttle limiter – by default, the right-side proportional rotary slider – is too far in the full throttle direction.

• If a model change causes the message …

… to appear, then the throttle / collective pitch stick (Ch1) or the throttle limiter – by default the right-hand side-mounted proportional rotary slider – is too far in the direction of full-throttle.

GRAUBELE

ULTIMATE

STARLET BELL47G

free free

 

Thr too high!

R12

R12 –––

• If a model change causes the message …

BIND. N/A

… to appear then binding settings should be checked.

• If a model change causes the message …

Fail Safe setup t.b.d.

… to appear then respective fail safe settings should be checked.

• If battery voltage is too low, the model switchover cannot be made due to reasons of safety. An appropriate message will appear in the screen:

not possible now voltage too low

79Program description - Model select

Copy / Erase

Erase model, copy model  model, copy from or to SD card, copy ﬂight phases

16 20

 

Erase« option in the multi-function menu:

Open this menu option with a tap on the center SET key of the four-way button pad:

Erase model

Select the “Erase model” sub-menu with the  selection keys of the left or right four-way button then brieﬂy tap on the SET key.

Choose the model to be erased with the  selection keys of the left or right four-way button …

This option is available as standard on both transmitter types.

Use the  selection keys on the left or right four-way button to select the »Copy /

Model select

Copy / Erase

Suppress menus Suppress models Base setup model Model type

Model select

Copy / Erase

Suppress menus Suppress models Base setup model Helicopter type

Erase model Copy model–>model Export to SD Import from SD Copy flight phase

=> => => =>

=> =>

model to be erased : 01

03 04

… whereby another tap on the SET key will cause the conﬁrmation request …

… to appear. A NO response will cause the process to be canceled and a return to the previous screen. Selecting the YES response with the  selection key of the left or right four-way button followed by conﬁrmation of the selection with a brief tap on the SET key will erase the selected model memory.

Caution: This erase process cannot be undone. All data in the selected model memory will be erased completely.

Note: If the currently active model memory is to be erased, a model type “Winged” or “Heli” must be deﬁned immediately after the erase process. If, however, an inactive memory location is erased, it will subsequently appear in “Model select” list as “free”.

GRAUBELE

ULTIMATE

STARLET BELL47G

Model really

to be erased?

GRAUBELE

YES

R12

R12 –––

Copy model  model

Select the “Copy model  model” sub-menu with the  selection keys of the left or right four-way button

then tap the SET key:

Erase model C l l

SWITCHING RF OFF

Copy ligh phase

If the message shown above should appear, the transmitter’s RF module is still active.

You can interrupt the process by pressing the central

ESC button of the left-hand four-way button.

Pressing the SET button of the right-hand four-way button resumes the process. However, if the receiving system is switched on, you should switch it off before doing this.

Choose the model to be copied with the  selection keys of the left or right four-way button …

Copy from model: 01

03 04

… then, following the change into the “Copy to model” window caused by another tap on the SET key of the right four-way button, the destination memory can be selected with the  selection keys of the left or right four-way button. Yet another tap on the SET key will then conﬁrm the copy process or a tap on ESC key will cause the copy to be cancelled. A memory location which is already occupied can be overwritten.

GRAUBELE

ULTIMATE

STARLET BELL47G

R12

R12 –––

Program description - Copy / Erase

Copy to model: 01 02 03 04

GRAUBELE ULTIMATE STARLET BELL47G

free



R12 R12 R12 –––

After conﬁrming the selected model memory with a tap on the SET key, a conﬁrmation request will appear:

Modell really

01 03

ULTIMATE

free



to be copied?

YES

A NO response will cancel the process and return the screen to the originating screen. If the  YES response is selected and conﬁrmed with a tap on the

SET key then the selected source model will be cop-

ied into the selected model memory destination.

Note: In addition to model data, binding data is also copied by this process. This means that a receiver system which was/is bound to the original model memory can also be operated by its copy in the SAME transmitter without establishing the bond again.

Exporting to SD card

Use the  selection keys of the left or right fourway button to select the “Export to SD” sub-menu then tap on the SET key.

Erase model Copy model–>model Export to SD Import from SD Copy flight phase

=> => => =>

=> =>

Choose the model to be exported with the  selection keys of the left or right four-way button …

export to SD-CARD: 01

03 04

GRAUBELE

ULTIMATE

STARLET BELL47G

R12

R12 –––

After conﬁrming the selected model memory with a tap on the SET key, a conﬁrmation request will appear:

modell

ULTIMATE

SD-CARD

export ?

YES

SD-CARD

INSERT

… appears instead of a screen for model selection, there is no SD card in the transmitter’s card slot, see page 24.

• In addition to model data, binding data is also copied by this process. This means that a receiver system which was/is bound to the original model memory can also be operated in the SAME transmitter by its copy without establishing the bond again.

• An exported ﬁxed-wing model will be stored on the memory card in the \\Models\mc-16 respectively \\Models\mc-20 folder with a ﬁlename format of “aModelname.mdl” and a helicopter model with a ﬁlename format of “hModelname.mdl”. On the other hand, if a “nameless” model is exported, its data will be stored on the memory card under “aNoName.mdl” or “hNoName.mdl”, as appropriate.

• Some special characters that can be used in model names are subject to speciﬁc restrictions associated with the FAT or FAT32 ﬁle system used by the memory cards and these special characters will be replaced during the copy process with a tilde (~).

• A model ﬁle already on the memory having the same name as the ﬁle to be copied will be overwritten without warning.

A NO response will cancel the process and return the screen to the originating screen. If the  YES response is selected then conﬁrmed with a tap on the

SET key, the selected model will be copied to the SD

card.

Notes:

• Should the notice …

81Program description - Copy / Erase

Importing from SD card

Use the  selection keys of the left or right fourway button to select the “Import from SD” sub-menu then tap on the SET key.

Erase model C d l d l

SWITCHING RF OFF

Copy ligh phase

> >

If the message shown above should appear, the transmitter’s RF module is still active.

You can interrupt the process by pressing the central

ESC button of the left-hand four-way button.

Pressing the SET button of the right-hand four-way button resumes the process. However, if the receiving system is switched on, you should switch it off before doing this.

Select the model to be imported from the SD memory card with the  selection keys of the left or right four-way button:

import from SD-CARD:

ALPINA

EXTRA

COBRA BELL47G

11/03/10

11/03/11

11/03/11 11/03/12

Note: The export date posted at the right end of each model name line is represented in the format “year/month/ day”.

After another tap on the SET key of the right four-way button, the “import from SD-CARD” window will appear. Now the destination memory location can be selected with the  selection keys of the left or right four-way button then conﬁrmed with a tap on the SET

Program description - Copy / Erase

key, or the process can be canceled with a tap on the

ESC key. A memory location which is already occu-

pied can be overwritten.

import to model: 01 02 03 04

GRAUBELE ULTIMATE STARLET BELL47G

free



R12 R12 R12 –––

After conﬁrming the selected model memory with a tap on the SET key, a conﬁrmation request will appear:

modell

ULTIMATE



free



import ?

YES

A NO response will cancel the process and return the screen to the originating screen. If the  YES response is selected and conﬁrmed with a tap on the

SET key then the selected source model will be im-

ported into the selected destination model memory.

Notes:

• If the message …

SD-CARD

INSERT

… appears instead of a screen for model selection, there is no SD card in the transmitter’s card slot, see page 24.

• In addition to model data, binding data is also imported by this process. This means that a receiver system which was/is bound to the original model memory can also be operated in the SAME transmitter by its copy without establishing the bond

again.

• In principle the model memories of the mx-20 and

mc- 2 0 transmitters are compatible, BUT:

If you wish to carry out an “Import from SD card” in the other transmitter you must ﬁrst copy or move the model memory concerned to the appropriate folder on a PC. For example: from \\Models\mc-20 to \\Models\mx-20, or vice versa.

C A U T I O N :

Copy ﬂight phase

Select the “Copy ﬂight phase” sub-menu with the  selection keys of the left or right four-way button then tap on the SET key.

Erase model Copy model–>model Export to SD Import from SD Copy flight phase

In the “Copy ﬂight phase” sub-menu …

Copy from phase:

3 5

2 4 6

… the ﬂight phase to be copied (1 … 7 for ﬁxed-wing models or 1 … 6 for helicopter models) is selected with the selection keys of the left or right four-way button then conﬁrmed with a brief tap on the SET key of the right four-way button. In the next window to

=> => => =>

=> =

appear …

Copy to phase:

3 5 7

… a destination must be selected and it must be conﬁrmed too. Another conﬁrmation request will follow:

Phase to:

1 Normal

to be copied?

2 4 6

2 Launch

A NO response will cancel the process and return the screen to the originating screen. If the  YES response is selected and conﬁrmed with a tap on the

SET key then the selected source model will be im-

ported into the selected destination model memory.

YES

83Program description - Copy / Erase

Suppress menus

Suppression of menus in the multifunction list

16 20

 

press codes« option in the multi-function menu:

Open this menu option with a tap on the center SET key of the four-way button pad.

This option is available as standard on both transmitter types.

Use the  selection keys on the left or right four-way button to select the »Sup-

Model select Copy / Erase

Suppress menus

Suppress models Base setup model Model type

Model select Copy / Erase

Suppress menus

Suppress models Base setup model Helicopter type

Model select

Copy / Erase Suppress models Base setup model Model type Suppress: TOG

Model select

Copy / Erase Suppress models Base setup model Helicopter type Suppress: TOG

The option to be suppressed/displayed is selected with the selection keys of the left or right four-way button then its status is switched over with a tap on the center SET key of the right four-way button:

Model select Copy / Erase

Suppress models

Base setup model Model type Suppress: TOG

Model select Copy / Erase

Suppress models

Base setup model Helicopter type Suppress: TOG

This can reduce the multi-function list considerably, in some cases to only a few menus, thus substantially improving clarity of the multi-function list. Options are not deactivated by being suppressed. They will simply no longer appear in the list. This also blocks direct access to these functions.

Tip: If you do not wish to block access to the multi-function list, in the interests of security we recommend that you use this list to suppress the »Code lock« menu from the multi-function list. This menu is available as standard on the can be unlocked as an extra-cost option on the mc-

mc- 2 0 HoTT transmitter only, but

16 HoTT transmitter. This setting also makes it a little

more difﬁcult for any unauthorised person to block access to the transmitter.

In the menu which then appears, menu items which are no longer needed or those which should not be changed, can be blocked from appearing in the multifunction list.

Program description - Suppress menus

Suppress models

Suppression of model memory locations

16 20

 

press models« option in the multi-function menu:

Open this menu option with a tap on the center SET key of the four-way button pad.

Model memories which are rarely needed or to which access is to be blocked for other reasons can be hidden from the model selection list. This also clariﬁes the overview layout for model selection.

The model to be suppressed/displayed is selected with the selection keys of the left or right four-way button then its status is switched over with a tap on the center SET key of the right four-way button.

This option is available as standard on the

mc- 2 0 HoTT transmitter only.

Use the  selection keys on the left or right four-way button to select the »Sup-

Model select Copy / Erase Suppress menus

Suppress models

Base setup model Model type

Model select Copy / Erase Suppress menus

Suppress models

Base setup model Helicopter type

03 04 05 06 07

GRAUBELE

STARLET BELL47G

free free free

  

R12

R12 –––

03 04 05

A model memory which is “stricken through” will no longer appear in the »Model select« menu:

GRAUBELE

ULTIMATE

STARLET BELL47G



free

Suppress:



R12

R12 –––

TOG

85Program description - Suppress models

Base setup model

Model-speciﬁc base settings for winged aircraft models

16 20

 

This option is available as standard on both transmitter types.

Before programming speciﬁc parameters, there are some basic settings to be made

which effect the currently active model memory. Use the  selection keys on the left or right four-

way button to select the »Base setup model« option in the multi-function menu:

Suppress models

Base setup model

Model type Servo adjustment Stick mode Control adjust

Open this menu option with a tap on the center SET key of the four-way button pad:

Model name

Base setup model Mod.name Stick mode module

HoTT

n/a

DSC Output PPM10

Change to the next screen page with a brief tap on the SET key of the right four-way button. This will open a screen of characters for entry of the model’s name. A maximum of 9 characters can be used to specify a model name.

!"#$%&’()�+,–./0123

456789:;

?@ AB CDE FGHIJKLMNOPQRSTUVWX YZ[¥]^_`abcdefghijk

Mod Name

GRAUB

Now the desired characters can be selected with the

Program description - Base setup models | Winged models

selection keys of the left four-way button. Move to the next position to select the next character with a tap on the center SET key of the right four-way button.

A simultaneous tap on the  or  keys of the right four-way button (CLEAR) will place a space character at the current position.

Positioning to any character position within the entry ﬁeld can be done with the  keys of the right fourway button.

A return to the previous menu screen is accomplished with a tap on the center ESC key of the left four-way button.

A model name entered in this manner will appear in the base screen of the »Model select« menu and in the sub-menus of the »Copy / Erase« menu item.

Stick mode

MODE 1 (Throttle at rigth stick)

elev. down

left rudder

elev. up

MODE 3 (Throttle at right stick)

elev. down

left aileron

elev. up

right rudder

right aileron

full throttle

left aileron

idle

full throttle

left rudder

idle

MODE 2 (Throttle at left stick)

full throttle

right aileron

left rudder

MODE 4 (Throttle at left stick)

full throttle

right rudder

left aileron

right rudder

idle

right aileron

idle

elev. down

left aileron

elev. up

elev. down

left rudder

elev. up

right aileron

right rudder

There are four fundamental options for assigning the four control functions (aileron, elevator, rudder and throttle/brake ﬂap) for a winged aircraft model to the two sticks. Just which of these options is chosen depends on the individual preferences of the individual model pilot.

Use the  selection keys of the left or right fourway button to select the “Stick mode” line. The option ﬁeld will be framed.

Base setup model Mod.name Stick mode module

HoTT

GRAUBELE

n/a

DSC Output PPM10

SEL

Tap on the SET key. The currently displayed stick mode will be displayed in inverse video. Now use the selection keys of the right four-way button to select from among options 1 through 4.

A simultaneous tap on the  or  keys of the right four-way button (CLEAR) will reset the display to stick mode “1”.

Another tap on the SET key will again deactivate option selection so a change to another line can be affected.

Module

mc-16 HoTT and m c- 20 HoTT are ﬁtted as

The standard with a HoTT RF module. However, it is also possible to switch to a non-Graupner|SJ external RF module by software, if such a module is connected to the transmitter. This is accomplished by using the Select buttons of the left or right-hand four-way button to move to the left, to the “Module select” value ﬁeld:

Base setup model Mod.name Stick mode module Rcv Ch Map R12

GRAUBELE

HoTT

bind

BD1

1 n/a n/a

BD2

HoTT

Graupner/SJ HoTT receivers must be “instructed” to communicate exclusively with a certain model (memory) in a Graupner/SJ HoTT transmitter. This procedure is known as “binding” and must only be done once for every new receiver/model-memory-location

combination (and can be repeated anytime).

Important notices:

• During the binding procedure be sure the transmitter’s antenna is always far enough away from the receiver’s antenna. To be on the safe side, keep them at least one meter apart. Otherwise there is a risk of a faulty connection to the return channel and malfunctions will result.

• When binding additional receivers, note that any other – switched on – receivers already bound to the transmitter will fall into Fail safe mode during the transmitter-side “binding” period.

“Binding” multiple receivers per model

Multiple receivers per model can be bound if desired, whereby respective

mc-16 HoTT and m c- 20

HoTT programs offer the potential for managing up to two receivers directly and for dividing up the transmitter’s 8 or 12 control channels (max) in any arrangement among these receivers under menu control. Refer to additional details further down in this section. First bind the receivers individually as described below.

When the system is actually in use, the only receiver which creates a telemetry link to the transmitter is either the last receiver to be bound, or the receiver which you selected in the “TEL.RCV.” line of the »Telemetry« menu, for example:

TELEMETRY

TEL.RCV. SETTING & DATA VIEW SENSOR SELECT RF STATUS VIEW VOICE TRIGGER

RCV CH1

Any telemetry sensors which may be built into the model should therefore be connected to this receiver

because the transmitter only receives and evaluates data from the return channel of the receiver activated on this line. The second, and all other receivers, operate in parallel but are fully independent in slave mode.

“Binding” transmitter and receiver

Use the  selection keys of the left or right fourway button to move into the “Module” line:

The marker frame will be positioned by default to the column for the next free binding channel. In the example shown in the ﬁgure below, the marker frame is positioned above the column label “BD2” because the binding channel in the column labeled “BD1” is already in use by default for the receiver which was delivered with the set:

Base setup model Mod.name Stick mode module Rcv Ch Map R12

GRAUBELE

HoTT

bind

BD1

1 n/a n/a

BD2

If already off, now switch the receiver on:

Receiver GR-16 and GR-24

The red LED on the receiver will blink.. Hold the SET button on the receiver pressed in for

about three seconds while the LED ﬂashes red; it will then ﬂash red / green for a further three seconds. The

SET button on the receiver can now be released. As

long as this LED blinks red/green, the receiver is in bind mode.

Now, within this 3 second period, start the so-called “receiver binding” process for the receiver to the currently active model memory with a brief tap on the center SET key of the right four-way button. At this time, the screen’s display will blend in a message window for the duration of the “binding” process.

Base setup model Mod.name Stick mode modu

Finding...

Rcv Ch Map R12

GRAUBELE

n/a n/a

BD1

BD2

If the receiver’s LED, again blinking red, changes within about 10 seconds to continuous illumination in green, the binding process has been successfully completed. Your model-memory to receiver combination is now operationally ready. At this time the screen will now display “ bind “ (bound) instead of “n/a” (not attached), for example:

Base setup model Mod.name Stick mode module Rcv Ch Map R12

GRAUBELE

HoTT

bind

BD1

bind

R08

BD2

On the other hand, should the LED on the receiver blink red for longer than about 10 seconds, the binding process has failed. In this case the screen will continue to show the status as “n/a”. If this should happen, try changing the position of antennas then repeat the entire procedure.

Binding other receivers

The binding channel you have chosen is already bound (as indicated by the “bind” status). This binding is to be replaced by another. After initiating the RF bind process, instead of displaying “BINDING”, the message shown below appears:

87Program description - Base setup models | Winged models

Base setup model

BD1

BELE

bind

R08

BD2

Mod. Stick modu Rcv

must be

OFF

Press the central SET button of the right-hand fourway button to erase the message.

Drop down two lines in the screen and switch off the RF module as described on the page in section “RF module”. Afterward, return again to the “Module” line and restart the binding process as described above.

Alternatively, the transmitter can be switched off brieﬂy then, after switching it back on again, respond to the message window that appears …

Please select

RF on/off?

ON OFF

… with “OFF” …

Please select

RF on/off?

ON OFF

… then conﬁrm the selection with a brief tap on the center SET key of the right four-way button. From the base screen jump again into the “Module” line of the »Basic settings, model« menu and restart the binding process.

Dissolving a bond

Proceed as described above to initiate the binding process but WITHOUT ﬁrst putting a receiver in binding readiness.

EXT. (PPM signal at DSC socket) If your transmitter is ﬁtted with a non-Graupner|SJ

external RF module connected to the DSC / Data socket, you can switch between the standard internal HoTT RF module and the external module when you switch model memories in the “Module” line by choosing either “HoTT”, “EXT.”, or “SP.”, as described in the following section.

You can now use the arrow button  of the right-hand four-way button to move to the ﬁrst Value ﬁeld in the “Module” line before pressing the central SET button of the right-hand four-way button:

Base setup model Mod.name Stick mode module Rcv Ch Map R12

GRAUBELE

HoTT

bind

BD1

bind

R08

BD2

In the active Value ﬁeld you should now use the Select buttons to choose “EXT.” or – if appropriate – the “SP.” mode (described below) instead of “HoTT”.

When you select “EXT.”, the HoTT-speciﬁc value ﬁelds are replaced by the modulation type already selected in the “DSC output” line; see page 92:

Base setup model Mod.name Stick mode module EXT.PPM sig.

GRAUBELE

EXT.

PPM10

normal

The lines of the “Receiver output” and “Range test” options (described below) are also suppressed, as are all the HoTT-speciﬁc displays in the base display; “PPM” is also superimposed instead of “HoTT”:

GRAUBELE #01

Stp Flt

0:00 0:00

4.0V

PPM

0:12h

Press the central SET button of the right-hand fourway button to conclude the Select process.

SP. (digital signal at Data socket) However, if you require a special digital signal instead

of the analogue PPM signal for the non-Graupner|SJ external RF module, then connect this to the DATA socket and select “SP.” in the “Module” line:

Base setup model Mod.name Stick mode module

GRAUBELE

SP.

BIND1

SP channel 6

Mod

Once again, press the central SET button of the righthand four-way button to conclude the Select process.

The lines of the “Receiver output” and “Range test” options (described below) are also suppressed, as are all the HoTT-speciﬁc displays in the base display; “SP.” is also superimposed instead of “HoTT”:

GRAUBELE #01

Stp Flt

0:00 0:00

4.0V

0:12h

Program description - Base setup models | Winged models

“Mode” column

Base setup model Mod.name Stick mode module

GRAUBELE

SP.

BIND

SP channel 6

Mod

In this column you select the transmission mode of the external RF module:

• Mode “1”: 2-channel hopping

• Mode “2”: x-channel hopping

“BIND” column

Base setup model Mod.name Stick mode module

GRAUBELE

SP.

1 BIND

SP channel 6

Mod

The “BIND” column in the right-hand column can be used to initiate the “Bind” process of the non-

Graupner|SJ system – the transmitter’s RF section must be switched off when the transmitter is ﬁrst switched on.

Important notes:

• The output voltage of the DATA socket is around 5 V, and must be reduced to the power supply voltage generally required by external digital RF modules (3 to max. 3.3 V). This is accomplished using the circuit which is shown here in diagrammatic form:

DATA S

Vcc IN = 5 V

DATA +

22µF/6.3 V

DATA -

Low Drop Voltage Regulator

GND

Vcc OUT = 3 ... 3.3 V

22µF/6.3 V

125000 baud signal

Vcc

SP.-MODULE with digital input signal

GND

• Servo travels must be limited to max. 128 %.

SP channels

Note: This menu line is suppressed in the “Module” line if you select “HoTT” or “EXT.”.

If necessary, use the Select buttons  of the left or right-hand four-way button to move to the “SP channels” line, then brieﬂy press the central SET button of the right-hand four-way button to activate the Value window:

Base setup model Mod.name Stick mode module SP channel

GRAUBELE

SP.

1 BIND

SEL

You can now select “6” or “8” channels using the righthand Select buttons. The procedure is concluded by again pressing the central SET button of the righthand four-way button.

At the transmitter this selection only affects the number of control channels transferred to the external RF module via the DATA socket. If you choose “6”, then these are control channels 1 … 6; if you choose “8”, these are channels 1 … 8.

Simultaneously pressing the  or  buttons of the right-hand four-way button (CLEAR) returns the display to “6”.

EXT. PPM signal

Note: This menu line is suppressed in the “Module” line if you select “HoTT”.

Base setup model Mod.name Stick mode module EXT.PPM sig.

GRAUBELE

EXT.

PPM10

normal

SEL

Some RF modules which can be connected to the DSC connector require an inverted input signal. Be sure to follow the respective module’s installation instructions for this.

The choice of “inverted” instead of the default preset “normal” allows for appropriate adaptation of the provided PPM signal.

A simultaneous tap on the  or  keys of the right four-way button (CLEAR) will reset the display to “normal”.

Receiver channel mapping

Note: This menu line is suppressed in the “Module” line if you select “EXT.” or “SP. ”.

As long as there is at least one “bound” HoTT receiver in the “Module” line, the next line down will be the “Rcv Ch map” line:

Base setup model Mod.name Stick mode module Rcv Ch Map R12

GRAUBELE

HoTT

bind

SET

bind

R08

SET

As already mentioned in the introduction to the section entitled “Binding receivers”, mc-16 HoTT and

89Program description - Base setup models | Winged models

mc- 2 0 HoTT transmitters feature a menu point in

which the transmitter’s control channels can be redistributed in any way you like within one receiver, and also include an option to distribute the transmitter’s control channels to a maximum of two receivers in any arrangement you desire. These are the eight standard / twelve optional control channels of the

mc-16 HoTT transmitter, and the standard twelve

control channels of the mc- 2 0 HoTT. This redistribution is termed “mapping” or “channel mapping” (channel assignment) in the following section.

Select the receiver to be “mapped” with the selection keys of the left or right four-way button then tap brieﬂy on the center SET key of the right four-way button.

Channel mapping within a receiver

This menu point provides a simple means of remapping the transmitter’s control channels in any way you like, in a similar manner to the channel assignment function termed “Channel mapping” in the »Tele metry« menu, as described on page 244. This means that you can re-distribute the transmitter’s control channels, which are present at the receiver inputs, to the selected receiver’s outputs / servo sockets in any way you like:

Receiver CH – BIND1 In Ch In Ch In Ch In Ch

After selection of the desired output with the selection keys of the left or right four-way button, the appropriate value ﬁeld will be framed. Brieﬂy tap on the center

SET key of the right four-way button. The current

setting will be displayed in inverse video. Now use the selection keys of the right four-way button to select the desired input channel’s respective transmitter output, see page 230.

Program description - Base setup models | Winged models

1 2 3 4

Out Ch Out Ch Out Ch Out Ch

1 2 3 4

BUT CAUTION: If, for example, “2AIL” has been speciﬁed in the “Aileron/camber ﬂaps” line of the »Model type« menu then the transmitter will have allocated control function 2 (ailerons) to control chan- nels 2 & 5 for the left and right ailerons. The corresponding receiver inputs to be assigned in this case would be channels 2 & 5, refer to the example below.

Examples:

• You would like to control each aileron of a large model with two or more servos.

Assign each of the appropriate outputs (servo connections) to one and the same input (control channel). In this case, depending on left or right wing, as the respective input to one of the two default aileron control channels (2 or 5).

• You would like to control the rudder of a large model with two or more servos.

Assign each of the appropriate outputs (servo connections) to one and the same input (control channel). In this case, the default rudder channel (4), see ﬁgure right.

Notes:

• The maximum number of lines (outputs) available corresponds to the maximum number of servos which can be connected to the receiver in question.

• If you see the warning …

CAN‘T

RECEIVE

DATA

… then there is no bound receiver within range. If the case may be, switch your receiving system on.

• With the »Tx. output swap« option, which is available as standard on the can be unlocked on the mc-16 HoTT transmitter at extra cost, see page 230, the transmitter’s control functions can be interchanged in any way; it is

mc- 2 0 transmitter, and

also possible to assign multiple outputs to one and the same control function. In the interests of clarity however we strongly advise that you use only one of these two options.

Channel assignment on second receiver

As already mentioned, the “Receiver channel mapping” menu point can be used to map (re-distribute) the transmitter’s control channels in any way amongst a maximum of two receivers; these are the eight standard / twelve optional control channels of the

mc-16 HoTT transmitter, and the standard twelve

channels of the mc- 2 0 HoTT transmitter. In this case the numbering of the outputs (servo sockets) and the maximum number of lines (outputs) available reﬂects the maximum number of servos which can be connected to the receiver in question.

Receiver CH – BIND2 In Ch In Ch In Ch In Ch 4

Receiver CH – BIND2 In Ch In Ch In Ch In Ch

Note: The upper screen-shot above shows the screen of the standard mc-16 HoTT eight-channel transmit- ter; the lower one the screen of the mc-20 HoTT twelve-channel transmitter.

After selection of the desired output with the selection keys of the left or right four-way button, the respective input ﬁeld will be framed. Tap the center SET key

8 8 8 8

12 12 12 12

Out Ch Out Ch Out Ch Out Ch

1 2 3

1 2 3 4

of the right four-way button. The current setting will be displayed in inverse video. Now select the desired input channel with the selection keys of the right fourway button. For example, suitable to the above rudder example:

Receiver CH – BIND2 In Ch In Ch In Ch In Ch

Note: The maximum number of lines (outputs) available reﬂects the maximum number of servos which can be connected to the receiver in question.

RF transmit

This menu line provides an option for manually switching the transmitter’s RF transmission on and off to speciﬁc models while the transmitter is in operation. For example, to save power while a model is being programmed. If this line option was set to OFF,

it will be canceled (i. e. set to ON) the next time the transmitter is switched on.

If necessary, use the  selection keys of the left or right four-way button to move into the “RF transmit“ line then activate the option with a brief tap on the center SET button of the right four-way button:

4 4 4

Out Ch Out Ch Out Ch Out Ch

1 2 3 4

Base setup model Stick mode module

HoTT

bind

Rcv Ch Map R12

bind

R08

RF transmit ON

SEL

The right selection keys can now be used to choose between OFF and ON. Another tap on the center

SET key of the right four-way button will conclude the

entry.

Range test

Note: This menu line is suppressed if you select “EXT.” or “SP.” in the “Module” line.

The built-in range test reduces transmission power to an extent that a functional test can be carried out even within a distance of less than 100 m.

Perform a range test on the Graupner/SJ HoTT system according to the following instructions. If necessary, have someone assist you in carrying out the range test.

1. Preferably, the receiver already bound to the transmitter should be installed into the model in its intended position.

2. Switch remote control on and wait for the green LED to light up on the receiver/s. Now servo movements can be observed.

3. Place the model on a level surface (pavement, low-cut grass or bare ground) such that receiver antennas are at least 15 cm above ground level. It may be necessary to put something under the model to raise it up enough for this.

4. Hold the transmitter at hip level and at some distance from one’s body.

5. If necessary, use the  selection keys of the left or right four-way button to reach the “RF range test” line in the menu then start range test mode with a tap on the center SET key of the right fourway button:

Base setup model module Rcv Ch Map R12 RF transmit ON RF Range Test 99sec

HoTT

bind

R08

SEL

When the range test has been initiated, the transmitter’s transmission power will be signiﬁcantly reduced and the green LED just to the right of the main switch on the transmitter, marked RF, will begin to blink; this will also be accompanied by acoustic tones. At the same time, the timer in the transmitter’s display will start counting down and every 5 seconds a two-frequency tone will sound.

GRAUBELE

#01

TEST 76s

3.9V

2:22h

Five seconds prior to the end of the range test a three-frequency tone will sound once every second. After expiration of the range test’s 99th second the transmitter will again be switched to full output power and the LED just to the right of the main switch on the transmitter will again illuminate constantly.

6. Move away from the model while manipulating the sticks during this timespan. If you notice an interruption anytime while still within a distance of about 50 m, try to reproduce this malfunction.

7. If there is a motor in the model, it may be necessary to switch it on to further check noise immunity.

8. Continue moving away from the model until perfect control is no longer possible.

9. Wait at this distance for the remainder of the test period with the still-operationally-ready model to expire. After the range test is ended it should again respond correctly to all RC controls. If this is not 100 % the case, do not use the system. Contact your area’s Graupner GmbH & Co. KG service partner.

10. Perform the range test before each ﬂight and, in

Stp Flt

0:00 0:00

HoTT

5.5V

91Program description - Base setup models | Winged models

doing so, simulate all servo movements which also take place during ﬂight. The range must always be at 50 m on the ground in order to assure safe model operation.

Caution: Never start the range test on the transmitter during normal operation of the model.

DSC output

If necessary, use the  selection keys of the left or right four-way button to switch to the “DSC Output” line then, with a brief tap on the center SET key of the right four-way button, activate the value window:

Base setup model Rcv Ch Map R12 RF transmit ON RF Range Test 99sec DSC Output PPM10

Now you can use the right selection keys to choose between four types of modulation “PPM10”, “PPM16”, “PPM18” and “PPM24”. Touch the center SET key of the right four-way button again to complete the entry.

This choice primarily inﬂuences the maximum number of control channels which can be attached to the DSC (direct servo control) socket, and thus also available to a ﬂight simulator or teacher/pupil system. By selecting “PPM10” this will be control channels 1 … 5, for “PPM16” channels 1 … 8, for “PPM18” channels 1 … 9 and for “PPM24” channels 1 … 12.

Cut off

Note: This menu line is suppressed if “None” or “None/inv” is selected for the “Motor on C1” line.

Depending on the “idle forward or back” choice made in the “Motor on C1” line of the »Model type« menu,

Program description - Base setup models | Winged models

R08

SEL

this motor “cut off” option can be coupled to a switch for throttling down a speed controller or to move a servo on the carburetor of a motor to the OFF position. This option can be used on the and mc- 2 0 HoTT transmitters as an emergency OFF function as well as an alternative “cut-off trim”, see “digital trims” on page 70.

This motor OFF position (Thr. CutOff) is speciﬁed in the left column ﬁeld over the column label SEL and its value is to be established through trial and error.

However, the speed controller or throttle servo only moves to the selected position when two conditions are fulﬁlled: a switch is operated, and a particular servo position or switching threshold is exceeded.

This is done by setting the desired servo position (threshold value) into the middle column ﬁeld, directly over the column label STO, then selecting the appropriate ON/OFF switch function in the right column.

• If the percentage value speciﬁed for the middle column is greater than the current servo position, i. e. the current servo position lies below the threshold, the switchover will occur as soon as the switch is put into its ON position.

• If the percentage value speciﬁed for the middle column is less than the current servo position, i. e. the current servo position is above the threshold, the speed controller will initially reduce motor speed or close the carburetor’s throttle servo only to the extent dictated by the value in the left column as soon as the servo’s position once under- runs the threshold (max. +150 %) after the switch is changed over to its ON position.

The speed controller or throttle servo will remain in this cut-off position only until the selected switch is again changed over followed by a one-time throttle servo or speed controller movement beyond the preset threshold with the throttle/brake stick control.

The factory setting for the left column is -100 % for

mc-16 HoTT

the throttle servo “cut-off” position and a threshold of +150 % servo position setting in the middle column.

Base setup model RF transmit ON RF Range Test 99sec DSC Output PPM10 cut off

Programming procedure

To change the throttle servo’s preset “cut-off” position, tap on the center SET key of the right four-way button. The current setting will be displayed in inverse video. Now use the selection keys of the left or right four-way button to set a value at which the motor is reliably “off”. If a combustion motor is involved, be sure the throttle servo does not perform mechanical runout, e. g. -125 %:

Base setup model RF transmit ON RF Range Test 99sec DSC Output PPM10 cut off

The – upper – preset value in the middle column ensures the motor can be stopped, throughout the maximum possible positioning range of the servo or speed controller, alone by the switch to be assigned in the right column.

However, if you wish to set a lower threshold, by which an underrun will cause the throttle servo or speed controller with closed switch to switch into the cut-off position, reduce the preset servo travel from +150 % by placing the throttle servo or speed controller into the desired position with the throttle/brake stick then touch the center SET key of the right fourway button.

–100%

SEL

–125%

SEL

+150%

–––

STO

–––

STO

Base setup model RF transmit ON RF Range Test 99sec DSC Output PPM10 cut off

Finally, use the column at the right to specify a switch with which you can cut off the motor directly (emergency) or which will be activated by the threshold.

Base setup model RF transmit ON RF Range Test 99sec DSC Output PPM10 cut off

Notes:

• Be sure the throttle servo does not run out mechanically when the cut-off function is activated.

• A threshold over +100 % is reached by tempo rarily increasing the travel for servo 1 in the »Servo ad- justment« menu to over 100 % then, after storing the threshold, change servo travel back to the original value.

–125%

SEL

–125%

SEL

+100%

–––

STO

time” – see page 163 – is always reset to the starting value when the transmitter is switched on.

A simultaneous tap on the  or  keys of the right four-way button (CLEAR) will reset the display to “yes”.

Auto timer reset

Base setup model RF Range Test 99sec DSC Output PPM10 cut off Auto timer reset yes

The “yes/no” setting made in this line determines whether or not all of the transmitter’s timers (except for “Model time” and “Transmitter operating time”) are automatically reset to their given starting values when the transmitter is switched on. In contrast, the “slot

+100%–125%

SEL

93Program description - Base setup models | Winged models

Base setup model

Model-speciﬁc base settings for helicopter models

16 20

 

This option is available as standard on both transmitter types.

Before programming speciﬁc parameters, there are some basic settings to be made

which effect the currently active model memory. Use the  selection keys on the left or right four-

way button to select the »Base setup model« option in the multi-function menu:

selection keys of the left four-way button. Move to the next position to select the next character with a tap on the center SET key of the right four-way button.

A simultaneous tap on the  or  keys of the right four-way button (CLEAR) will place a space character at the current position.

Positioning to any character position within the entry ﬁeld can be done with the  keys of the right fourway button.

Suppress models

Base setup model

Helicopter type Servo adjustment Stick mode Control adjust

Open this menu option with a tap on the center SET

A return to the previous menu screen is accomplished with a tap on the center ESC key of the left four-way button.

A model name entered in this manner will appear in the base screen of the »Model select« menu and in the sub-menus of the »Copy / Erase« menu item.

Stick mode

key of the four-way button pad:

Model name

Base setup model Mod.name Stick mode module

HoTT

n/a

DSC Output PPM10

!"#$%&’()�+,–./0123

456789:; FGHIJKL MNOPQRSTUVWX YZ[¥]^_`abcdefghijk

?@ AB CDE

Basically there are four different ways to assign the four helicopter control functions, roll, nick, tail rotor and throttle/pitch to the two sticks. Just which of these is used depends on the preferences of the individual model pilot.

Use the  selection keys of the left or right four-

Mod Name

STARL

way button to select the “Stick mode” line. The option ﬁeld will be framed.

Now the desired characters can be selected with the

Program description - Base setup models | Helicopter models

MODE 1 (Throttle at right stick)

pitch axis

tail rotor

pitch axis

MODE 3 (Throttle at right stick)

pitch axis

roll

pitch axis

throttle/pitch

tail rotor

roll

throttle/pitch

roll

tail rotor

throttle/pitch

MODE 2 (Throttle at left stick)

throttle/pitch

roll

tail rotor

throttle/pitch

MODE 4 (Throttle at left stick)

throttle/pitch

tail rotor

roll

throttle/pitch

tail rotor

roll

pitch axis

roll

pitch axis

tail rotor

pitch axis

roll

tail rotor

Base setup model Mod.name Stick mode module

HoTT

STARLET

n/a

DSC Output PPM10

SEL

Tap on the SET key. The currently displayed stick mode will be displayed in inverse video. Now use the selection keys of the right four-way button to select from among options 1 through 4.

A simultaneous tap on the  or  keys of the right four-way button (CLEAR) will reset the display to stick mode “1”.

Another tap on the SET key will again deactivate option selection so a change to another line can be affected.

Module

mc-16 HoTT and m c- 20 HoTT are ﬁtted as

Base setup model

HoTT

STARLET

bind

BD1

1 n/a n/a

BD2

Mod.name Stick mode module Rcv Ch Map R12

HoTT

combination (and can be repeated anytime).

Important notices:

“Binding” multiple receivers per model

Multiple receivers per model can be bound if desired, whereby respective

mc-16 HoTT and m c- 20

TELEMETRY

TEL.RCV. SETTING & DATA VIEW SENSOR SELECT RF STATUS VIEW VOICE TRIGGER

RCV CH1

Any telemetry sensors which may be built into the model should therefore be connected to this receiver

“Binding” transmitter and receiver

Use the  selection keys of the left or right fourway button to move into the “Module” line:

Base setup model

HoTT

STARLET

bind

BD1

1 n/a n/a

BD2

Mod.name Stick mode module Rcv Ch Map R12

If already off, now switch the receiver on:

Receiver GR-16 and GR-24

The red LED on the receiver will blink.. Press and hold the SET button on the receiver while

the LED continues to blink red for about 3 seconds, then begins to blink red/green for about another 3 seconds. The SET button on the receiver can now be released. As long as this LED blinks red/green, the receiver is in bind mode.

Base setup model Mod.name Stick mode modu

Finding...

Rcv Ch Map R12

STARLET

BD1

1 n/a n/a

BD2

Base setup model

HoTT

STARLET

bind

R08

BD1

BD2

Mod.name Stick mode module Rcv Ch Map R12

Binding other receivers

95Program description - Base setup models | Helicopter models

Base setup model Mod. Stick modu Rcv

must be

OFF

bind

R08

BD1ETBD2

Press the central SET button of the right-hand fourway button to erase the message.

Alternatively, the transmitter can be switched off brieﬂy then, after switching it back on again, respond to the message window that appears …

Please select

RF on/off?

ON OFF

… with “OFF” …

Please select

RF on/off?

ON OFF

Dissolving a bond

Proceed as described above to initiate the binding process but WITHOUT ﬁrst putting a receiver in binding readiness.

EXT. (PPM signal at DSC socket) If your transmitter is ﬁtted with a non-Graupner|SJ

Base setup model

HoTT

STARLET

bind

BD1

R08

BD2

Mod.name Stick mode module Rcv Ch Map R12

In the active Value ﬁeld you should now use the Select buttons to choose “EXT.” or – if appropriate – the “SP.” mode (described below) instead of “HoTT”.

When you select “EXT.”, the HoTT-speciﬁc value ﬁelds are replaced by the modulation type already selected in the “DSC output” line; see page 100:

Base setup model

EXT.

STARLET

PPM10

normal

Mod.name Stick mode module EXT.PPM sig.

STARLET #02

Stp Flt

0:00 0:00

4.0V

PPM

0:12h

Press the central SET button of the right-hand fourway button to conclude the Select process.

SP. (digital signal at Data socket) However, if you require a special digital signal instead

of the analogue PPM signal for the non-Graupner|SJ external RF module, then connect this to the DATA socket and select “SP.” in the “Module” line:

Base setup model Mod.name Stick mode module

STARLET

SP.

BIND1

SP channel 6

Mod

Once again, press the central SET button of the righthand four-way button to conclude the Select process.

STARLET #02

Stp Flt

0:00 0:00

4.1V

0:12h

Program description - Base setup models | Helicopter models

“Mode” column

Base setup model Mod.name Stick mode module

STARLET

SP.

BIND

SP channel 6

Mod

In this column you select the transmission mode of the external RF module:

• Mode “1”: 2-channel hopping

• Mode “2”: x-channel hopping

“BIND” column

Base setup model Mod.name Stick mode module

STARLET

SP.

1 BIND

SP channel 6

Mod

The “BIND” column in the right-hand column can be used to initiate the “Bind” process of the non-

Graupner|SJ system – the transmitter’s RF section must be switched off when the transmitter is ﬁrst switched on.

Important notes:

DATA S

Vcc IN = 5 V

DATA +

22µF/6.3 V

DATA -

Low Drop Voltage Regulator

GND

Vcc OUT = 3 ... 3.3 V

22µF/6.3 V

125000 baud signal

Vcc

SP.-MODULE with digital input signal

GND

• Servo travels must be limited to max. 128 %.

SP channels

Note: This menu line is suppressed in the “Module” line if you select “HoTT” or “EXT.”.

Base setup model Mod.name Stick mode module SP channel

STARLET

SP.

1 BIND

SEL

You can now select “6” or “8” channels using the righthand Select buttons. The procedure is concluded by again pressing the central SET button of the righthand four-way button.

Simultaneously pressing the  or  buttons of the right-hand four-way button (CLEAR) returns the display to “6”.

EXT. PPM signal

Note: This menu line is suppressed in the “Module” line if you select “HoTT”.

Base setup model

EXT.

STARLET

PPM10

normal

Mod.name Stick mode module EXT.PPM sig.

SEL

Some RF modules which can be connected to the DSC connector require an inverted input signal. Be sure to follow the respective module’s installation instructions for this.

The choice of “inverted” instead of the default preset “normal” allows for appropriate adaptation of the provided PPM signal.

A simultaneous tap on the  or  keys of the right four-way button (CLEAR) will reset the display to “normal”.

Receiver channel mapping

Note: This menu line is suppressed in the “Module” line if you select “EXT.” or “SP. ”.

As long as there is at least one “bound” HoTT receiver in the “Module” line, the next line down will be the “Rcv Ch map” line:

Base setup model

HoTT

STARLET

bind

SET

R08

SET

Mod.name Stick mode module Rcv Ch Map R12

As already mentioned in the introduction to the section entitled “Binding receivers”, mc-16 HoTT and

97Program description - Base setup models | Helicopter models

mc- 2 0 HoTT transmitters feature a menu point in

mc-16 HoTT transmitter, and the standard twelve

control channels of the mc- 2 0 HoTT. This redistribution is termed “mapping” or “channel mapping” (channel assignment) in the following section.

Select the receiver to be “mapped” with the selection keys of the left or right four-way button then tap brieﬂy on the center SET key of the right four-way button.

Channel mapping within a receiver

Receiver CH – BIND1 In Ch In Ch In Ch In Ch

After selection of the desired output with the selection keys of the left or right four-way button, the appropriate value ﬁeld will be framed. Brieﬂy tap on the center

SET key of the right four-way button. The current

setting will be displayed in inverse video. Now use the selection keys of the right four-way button to select the desired input channel’s respective transmitter output, see page 230.

Program description - Base setup models | Helicopter models

1 2 3 4

Out Ch Out Ch Out Ch Out Ch

1 2 3 4

BUT CAUTION: If you wish to operate two servos with one control function, for example such as transmitter control function 2 (roll) which is divided up into control channels 1 & 2 for left and right roll servos for the “3Sv(2Roll)” option in the »Helicopter type« menu; then “map” the corresponding transmitter outputs, in this case for channels 1 & 2 (= inputs to the receiver) accordingly.

Notes:

• The maximum number of lines (outputs) available

• If you see the warning …

• With the »Tx. output swap« option, which is avail-

Channel assignment on second receiver

mc-16 HoTT transmitter, and the standard twelve

channels of the mc- 2 0 HoTT transmitter. In this case the numbering of the outputs (servo sockets)

corresponds to the maximum number of servos which can be connected to the receiver in question.

CAN‘T

RECEIVE

DATA

… then there is no bound receiver within range. If the case may be, switch your receiving system on.

able as standard on the can be unlocked on the mc-16 HoTT transmitter at extra cost, see page 230, the transmitter’s control functions can be interchanged in any way; it is also possible to assign multiple outputs to one and the same control function. In the interests of clarity however we strongly advise that you use only one of these two options.

mc- 2 0 transmitter, and

and the maximum number of lines (outputs) available reﬂects the maximum number of servos which can be connected to the receiver in question.

Receiver CH – BIND2 In Ch In Ch In Ch In Ch 4

Receiver CH – BIND2 In Ch In Ch In Ch In Ch

Note: The upper screen-shot above shows the screen of the standard mc-16 HoTT eight-channel transmit- ter; the lower one the screen of the mc-20 HoTT twelve-channel transmitter.

After selection of the desired output with the selection keys of the left or right four-way button, the respective input ﬁeld will be framed. Tap the center SET key of the right four-way button. The current setting will be displayed in inverse video. Now select the desired input channel with the selection keys of the right fourway button. For example, appropriate for the above example with roll servos:

Receiver CH – BIND2 In Ch In Ch In Ch In Ch

8 8 8 8

12 12 12 12

2 12 12

Out Ch Out Ch Out Ch Out Ch

1 2 3

1 2 3 4

Note: The maximum number of lines (outputs) available reﬂects the maximum number of servos which can be connected to the receiver in question.

RF transmit

it will be canceled (i. e. set to ON) the next time the transmitter is switched on.

Base setup model Stick mode module

HoTT

bind

Rcv Ch Map R12

bind

R08

RF transmit ON

SEL

The right selection keys can now be used to choose between OFF and ON. Another tap on the center

SET key of the right four-way button will conclude the

entry.

Range test

Note: This menu line is suppressed if you select “EXT.” or “SP.” in the “Module” line.

The built-in range test reduces transmission power to an extent that a functional test can be carried out even within a distance of less than 100 m.

Perform a range test on the Graupner/SJ HoTT system according to the following instructions. If necessary, have someone assist you in carrying out the

range test.

1. Preferably, the receiver already bound to the transmitter should be installed into the model in its intended position.

2. Switch remote control on and wait for the green LED to light up on the receiver/s. Now servo movements can be observed.

4. Hold the transmitter at hip level and at some distance from one’s body.

Base setup model module Rcv Ch Map R12 RF transmit ON RF Range Test 99sec

HoTT

bind

R08

SEL

STARLET

#02

TEST 76s

3.9V

2:22h

Five seconds prior to the end of the range test a three-frequency tone will sound once every second. After expiration of the range test’s 99th second the transmitter will again be switched to full output power and the green LED just to the right of the main switch on the transmitter will again illuminate constantly.

6. Move away from the model while manipulating the sticks during this timespan. If you notice an interruption anytime while still within a distance of about 50 m, try to reproduce this malfunction.

7. If there is a motor in the model, it may be necessary to switch it on to further check noise immunity.

8. Continue moving away from the model until perfect control is no longer possible.

10. Perform the range test before each ﬂight and, in doing so, simulate all servo movements which also take place during ﬂight. The range must always be at 50 m on the ground in order to assure safe model operation.

Caution: Never start the range test on the transmitter during normal operation of the model.

Stp Flt

0:00 0:00

HoTT

5.5V

99Program description - Base setup models | Helicopter models

DSC output

Base setup model Rcv Ch Map R12 RF transmit ON RF Range Test 99sec DSC Output PPM10

Autorotation

Autorotation is that state of descending ﬂight in which the pitch of main rotor blades are set such that the rotor’s speed matches the natural forces of air ﬂowing through, like a windmill. The rotational energy stored in the mass of the rotor by this process can then be converted into upthrust by adjusting blade pitch, in order to halt the descent and “rescue” the model.

Autorotation is a means by which real and model helicopters are able to land safely in emergency situations, e. g. in the event of a motor failure. However, the prerequisite for this is a well-trained pilot familiar with the helicopter’s characteristics. Quick reaction and good perceptiveness are necessary because the rotor’s inertia can only be used once to generate

R08

SEL

recovery lift. When this technique is evaluated during competi-

tions, the motor must be switched off for autorotation. On the other hand, for training mode it is advantageous to keep the motor at idle for autorotation.

The Autorotation switch causes a switchover to the autorotation ﬂight phase in which control of “throttle” and “pitch” are separate and all mixers which have an effect on the throttle servo are switched off. Corresponding parameter settings are made in the »Heli- copter mixer« (see text beginning page 188); refer also to the “Principle of the Auto. C1 Pos.” topic which follows.

The “Autorotation” name is permanently assigned to this phase and it is included in the base screen and the screens of all ﬂight phase dependent menus. This name can NOT be changed. It is only possible to assign a switch to this option at the right of this display, as described on page 68. If a switch is assigned,

it will have absolute priority over all other ﬂightphase switches:

Base setup model RF transmit ON RF Range Test 99sec DSC Output PPM10 Autorotation

More about ﬂight-phase programming can be found in the text beginning on page 188 in the»Helicopter

mixer« section. Autorotation C1 position

The autorotation ﬂight-phase can alternatively be activated by a threshold point for the C1 throttle/pitch stick. To do this, use the  selection keys of the left or right four-way button to move into the “Autorot. C1-Pos.” line.

As soon as this display line has been selected, its

–––

value ﬁeld, located above the column label STO will be framed.

Base setup model RF Range Test 99sec DSC Output PPM10 Autorotation Auto.C1 Pos.

Move the C1 stick into the desired threshold switchover position then tap the center SET key of the right four-way button. The current value will be displayed, e. g.:

Base setup model RF Range Test 99sec DSC Output PPM10 Autorotation Auto.C1 Pos.

After this has been done, use the selection keys to move into the column above the switch symbol then assign a switch to this ﬁeld, as described in section “Physical control, switch and control switch assignments” on page 68:

Base setup model RF Range Test 99sec DSC Output PPM10 Autorotation Auto.C1 Pos.

Once this activation switch is closed, the ﬁrst occurrence of a threshold underrun will cause the program to switch over to “Autorotation” and then remain independent of C1 position in this ﬂight phase until the activating switch, in this example switch 4, is again “OFF”.

“Autorot. C1-Pos.” has precedence over all other

–66%

STO

––– –––

–––

Program description - Base setup models | Helicopter models

100

Graupner mc-16, mc-20 Programming Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of contents

Environmental protection notices

Safety notices

Safety notices and handling regulations for Lithium-Ion (LiIo) and Lithium-Polymer (LiPo) batteries

Foreword

mc-16 and mc-2 0 series computer systems

Technical data

General operating notices

Transmitter power supply

Charging the transmitter battery via the USB socket

Charging with automatic chargers

Recommended chargers (accessory)

Removing the transmitter’s battery

Inserting the transmitter’s battery

Battery operation timer at the bottom left of the screen

General charging notices

Opening the transmitter housing

Lithium battery CR 2032

Brake spring and ratchet

Joystick restoring force

Stick length adjustment

Transmitter neckstrap support bars

Transmitter description

Front side

Face-side connections

Charger socket

DSC jack

Data jack

Headset connector

Card slot

Data acquisition / storage

Mini-USB connector

Importing/exporting model memories

Bottom side transmitter interior

Display and keypad

Operating the “data terminal“

Displayed telemetry symbols

Keys left of the display

Keys to the right of the display

Shortcuts

Concealed menu columns

Position indicator

Entry lockout

Warning notices

HIDDEN MODE

VOICE

Language change

STICK CALIBRATION

Bluetooth initialisation

Telemetry data display

RECEIVER

GENERAL MODUL

ELECTRIC AIR MODUL

Vario

AIR ESC

Commissioning the transmitter

Receiver initialization

Receiver power supply

Receiver system power supply

Backing up receiver settings

Installation notices

Physical control, switch and control switch assignments

Digital trim

Winged models

Helicopter models

Detail program description

Loading a new memory location

Model select

Model select

Copy / Erase

Erase model

Copy / Erase

Copy model  model

Exporting to SD card

Importing from SD card

Suppress menus