Graupner mc-32 Hott Programming Manual

33032.mc-32 HoTT.3.en

mc-32

Programming Manual

Table of contents

General notices

Warning and note symbols ......................................... 3

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

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

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

Environmental protection notices .............................. 10

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

Remote control set description ................................. 13

Technical data .......................................................... 16

General operating notices

Transmitter .......................................................... 18

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

Transmitter power supply ............................... 18

Recommended chargers (accessory) ............. 19

Battery operation timer ................................. 19

General charging notices ................................ 20

Lithium battery CR 2032 .............................. 20

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

Stick conversions ........................................... 21

Transmitter neckstrap support bars .............. 22

Installation of switches, switch modules and

knob modules ............................................... 22

Aligning the antenna ..................................... 22

Transmitter description

Front side ....................................................... 23

Face-side connectors

Charger socket ............................................. 24

DSC jack ........................................................ 24

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

Data jack ........................................................ 25

Card slot ........................................................ 26

Headset connector ......................................... 27

Ext. PPM ........................................................ 27

SPI ................................................................. 28

Bottom side transmitter interior ............................ 29

Display and keypad ............................................. 30

Operating the “data terminal“ ............................... 31

Table of contents

2

Shortcuts ............................................................ 32

Warning notices in the display ............................. 33

Function fields in the display ................................ 34

Entry lockout ....................................................... 34

HIDDEN MODE ................................................... 35

Display contrast .................................................. 35

Language selection

VOICE .................................................. 35

Change of display language ................. 36

Firmware update via SD card ......................... 36

STICK CALIBRATION ..................................... 37

Bluetooth initialization ..................................... 39

Telemetry data display ......................................... 40

Commissioning the transmitter ........................... 48

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

Restoring the transmitter software ....................... 51

Receiver initialization ............................................ 52

Receiver firmware updates .................................. 53

Secure receiver settings....................................... 53

Installation notices ................................................ 54

Receiver power supply ........................................ 55

Definitions of terms ................................................... 58

Physical control, switch and control switch assignments ...... 60

Digital trim ................................................................ 62

Winged models ...................................................... 64

Receiver layout .................................................... 65

Servos in wrong direction .................................... 66

Helicopter models ................................................. 68

Receiver layout .................................................... 69

Program descriptions

Loading a new memory location .............................. 70

»Model select« ....................................................... 73

»Copy / Erase« ....................................................... 74

Erase model ....................................................... 74

Copy model  Model ......................................... 75

Export to SD card ............................................... 75

Import from SD card ........................................... 76

Copy flight phase ................................................ 77

Changes ............................................................. 77

»Suppress codes« ................................................. 80

»Suppress models« ............................................... 81

»Basic settings, model«

Winged model .................................................... 82

Binding type .................................................. 83

Binding receivers ........................................... 84

Range test ..................................................... 88

Helicopter model ................................................ 92

Binding type .................................................. 93

Binding receivers ........................................... 94

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 ................................... 128

Idle setting ................................................... 129

Throttle limit in combination with AR

in the »Stick mode menu« ......................... 131

»Dual Rate / Expo«

Winged model .................................................. 132

Helicopter model .............................................. 136

»Channel 1 curve«

Winged model .................................................. 140

Helicopter model .............................................. 143

»Switch display« .................................................. 146

»Control switch« .................................................. 146

»Logical switches« .............................................. 150

How do I program a flight phase? .......................... 152

»Phase settings«

Winged model .................................................. 154

Helicopter model .............................................. 158

»Phase assignment« ........................................... 160

»Phase trim« (winged model) ............................... 162

»Non-delayed channels« .................................... 163

»Timers (general)« ............................................... 164

»Flight phase timers« .......................................... 168

What is a mixer ...................................................... 171

»Wing mixers« ..................................................... 172

1 aileron ............................................................ 175

1 aileron and 1 camber flap .............................. 176

2 ailerons .......................................................... 178

2/4 ailerons and 1/2/4 camber flaps ................. 180

»Helicopter mixer« .............................................. 190

Adjusting the throttle and pitch curve ............... 202

Autorotation setting ........................................... 206

General remarks about freely progr. mixers .......... 208

»Free mixers« ...................................................... 209

Linear mixers .................................................... 213

Exponential mixers ........................................... 215

Examples .......................................................... 218

»MIX active/phase« .............................................. 220

»Mix only Channel« ............................................. 221

»Dual mixer« ........................................................ 222

»Swashplate mixer« ............................................ 223

»Fail Safe« ............................................................ 224

»Teacher/pupil« ................................................... 226

Connection schematic ...................................... 229

Wireless HoTT system ..................................... 230

»Transmitter output« ........................................... 234

»Pro-trim«

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

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

»Trim memory«

Winged model .................................................. 240

Helicopter model .............................................. 242

»Telemetry« .......................................................... 244

Important notes ................................................ 244

Setting & dataview ............................................ 246

Satellite mode of two receivers ................... 255

Sensor/s ...................................................... 257

Selecting sensor/s ............................................ 258

RF status view .................................................. 259

Select voice update .......................................... 260

»Channel sequence« ........................................... 262

»Multichannel« ..................................................... 264

»Ring Limiter« ...................................................... 268

»MP3-Player« ....................................................... 272

»Basic settings« .................................................. 275

»Servo display« ................................................... 282

»Servo test« ......................................................... 283

»Code lock« ......................................................... 284

»Info display« ....................................................... 286

Programming examples

Introduction ............................................................ 288

Winged model

First steps ......................................................... 290

Incorporating an electric drive .......................... 296

C1 stick switchover between

Electric motor and butterfly .......................... 300

Electric motor and airbrake ......................... 303

Timer activation by control or switch ................. 304

Parallel operating servos .................................. 306

Using flight phases

Example 1 ................................................... 308

Example 2 ................................................... 312

Control of temporal processes ......................... 318

Delta and flying wing models ............................ 320

F3A model ........................................................ 324

Helicopter model .................................................... 328

Appendix

FCC declaration ..................................................... 342

Conformity declaration ........................................... 343

Guarantee certificate ............................................. 344

Warning and notice
symbols

and their meaning

WARNING:

This symbol highlights the adjacent or follow­ing instructions, which absolutely must be
adhered to by the user! Any disregard of
these instructions, can affect the safe opera­tion and safety of the operator as well as
bystanders.

ATTENTION:

This symbol highlights the adjacent or follow­ing instructions which must be observed by
the user! Any disregard of these instructions
can lead to damage of any kind, loss of guar­antee and so on.

This symbol without specific headline empha­sizes the adjacent or following notes and tips
which should be strictly observed by the user!
Any disregard of these instructions and tips
can result in damage of any kind.

This symbol highlights hints and tips of all
kinds, which should be observed by the user.

This symbol highlights information about
cleaning the device, which should be strictly
observed by the operator in order to ensure a
long life of the device.

Table of contents

3

Safety notices

Be sure to pay attention!

In order to enjoy your modelling hobby for a long time,
please read these instructions thoroughly and give
particular attention to the safety notices.

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

INTENDED USE

ATTENTION:

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 and can cause damages
to the remote control system, to other things and/
or to the people. For damages derived from other
use we offer no warranty and take no liability.

ATTENTION:

NOT SUITABLE FOR KIDS UNDER 14

YEARS OLD, 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.

This manual is an important part of the set, it

contains important information for a proper

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

Failure to comply with the operating instruc-

tions and the safety instructions will void the

warranty.

Other notes and warnings

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 343.

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

Safety notices

4

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 possi­ble, 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, see “installation notes” on page

54. 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
carburettor 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 rst

and then the receiver.

Always switch the receiver off rst

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.

WARNING:

If this order is not respected, that the receiver
is turned on, but the corresponding transmit-

ter is “OFF”, the receiver could respond by
other transmitters and any interference.
The model can be run as a result uncontrolled steer­ing movements, thus possibly causing property dam­age and / or personal injury.
In particular with a mechanical gyro for models:
Before you switch your receiver off, make sure by
interrupting the power supply, that the motor can not
run up unintentionally.

An expiring gyro can generate such a voltage that
the receiver picks up as an apparently valid throt­tle command. Then, the motor may start uninten­tionally!

Range test and function test

Perform checks for proper operation and

range before every session. Secure the mod-

el 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 88 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.

Safety notices

5

Safety notices

WARNING:

If the range and functional test, and ight

simulation are not carried out in detail and

conscientiously, this may have undetect­ed malfunction and / or reception failures result in
eg loss of control or even a crash of the model
and can lead to signicant things and / or person­al injury as a result.

Operating a winged aircraft, helicopter, ship or
car

WARNING:

•

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 operat-

ing 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.

Never y over spectators or other

pilots. Never endanger humans or

animals. Never y in the vicinity of

Aero-towing

WARNING:

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 recharged!!” display and acoustic
signal.

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 between 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 lters for extension cables

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.

Safety notices

6

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

WARNING:

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 ying right away if a
storm is approaching. Static charging via the
antenna also represents a lethal hazard.

Attention

•

between this system’s antenna and other persons

In order to fulfill FCC HF emission require­ments for mobile transmitters, a distance
of at least 20 cm must be maintained

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

P

means. Use only a dry, soft cloth.

Components and accessories

WARNING:

As manufacturer of this equipment Graup­ner GmbH & Co. KG recommends only com-

ponents 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

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 this manual.

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. Therefore 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 le is present; see page 26 un-

der “Data recording” so as page 159
under “Flight time”. For the same reason the
transmitter must always be updated to the latest
software status.

Keep in mind, however, that for technical reasons

during playback of MP3 les NO data recording is

possible.

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.

Safety notices

7

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.

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:

Special notices for charging LiIo-/LiPo batteries
from Graupner

WARNING:

•

of improper charging or discharging.

• 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 18 or www.graupner.de.

Since Graupner GmbH cannot supervise
the correct charging and discharging of
cells, the entire guarantee is void in cases

• 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.

• 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.

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

• Never leave batteries being charged unattended.

• 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.

• Avoid short circuit. Never pierce a LiIo/LiPo bat­tery, by doing it you may cause a short circuit and
a fire, explosion and other problems.

• 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.

• 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.

• Before every use check the state of your batteries.
Damaged or ruined batteries or cells should not
be used.

• LiIo/LiPo batteries contain electrolytes and elec­trolyte vapours which are unhealthy. Never enter in
touch directly with electrolytes. In case of contact
with eyes, skin or other parts of the body, wash
soon with a lot of water and call soon a doctor.

• 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.

• 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 ames.

• 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.

• 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.

• 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.

Safety notices

8

• 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!

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

•

currents, please follow the catalog specifications.

A continuous current rate of about 1 C
does not represent a major problem for
Graupner LiIo-/LiPo batteries. For larger

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 in­troduced. The temperature can easily be checked
with the infrared thermometer, 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

•

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 short-circuit condition.

• 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.

Handling connectors

•

can easily be broken off. Due to thermal transfer,
the connector tabs may not be soldered directly.

• The connections of LiLo / LiPo batteries are not

Never short-circuit the battery. A short­circuit allows very high current to flow and
this heats up the cells. This will lead to

These connectors are not as robust as for
other batteries. This applies particularly to
the plus pole connector. The connections

as robust as those of other batteries. This applies
in particular to the positive pole connection. The
connections can easily break off.

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

industrial 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 liq-

uids, such as water, seawater or beverages.
Any contact with liquids, of whatever nature, is to be
avoided.

Safety notices

9

Notes for environmental protection

Notice for remote control set mc- 3 2 HoTT

No. 33016 / 33020

These radio control sets are fi tted 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 author-

ized collection centre.
Disposing of batteries along with common household

garbage is forbidden. Old batteries can be turned into
communal collection centres 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
Service: Used batteries
Henriettenstr. 94-96

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

mental protection.

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.

Caution:

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

Foreword

10

This manual serves only as a source of infor-

mation and can be changed without prior noti-

fi cation. Graupner accepts no responsibility or
liability for errors or inaccuracies which may be con­tained in the information section of this manual.

11Remote control set description

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
radio-frequency utilization permitted by certifi cation
for the 2.4 GHz ISM band, this number is signifi cantly
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 diffi cult 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 swap 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.

Based on the mc-24 Graupner/JR computerized
remote control system, the
control system has been especially developed for ex-

mc- 3 2 HoTT remote

perienced RC pilots All conventional model types can
be readily operated with the
regardless of whether the model is a winged aircraft,
helicopter, ship or land vehicle.

Complex mixed-control functions of guiding surfaces
are often necessary for winged aircraft (rudder, eleva­tors) and helicopter models (swashplate). Thanks to
modern computer technology, very diverse model
requirements can be programmed in the simplest
conceivable manner with touch-sensitive keys (CAP
Touch). Simply select the given model type from the

mc- 3 2 HoTT system,

mc- 3 2 HoTT program and its software will assem-

ble all signifi cant mixer functions and coupling func­tions automatically. This eliminates the need for sepa­rate modules in the transmitter to implement complex
coupled functions and also makes sophisticated
mechanical mixer mechanisms in the model unnec­essary. For example, this makes the mc-3 2 HoTT
transmitter fully equipped with both software and
hardware to operate the well-known NAUTIC modules
on the receiver side. The “channel sequencer” is new.
It permits the operation of up to three servos to be
automated.

mc- 3 2 HoTT system offers optimal security

The
and reliability without having to forgo great operating
convenience. The m c-32 HoTT remote control sys­tem has 80 model memory locations. Additional fl ight­phase-specifi c 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 fl ight 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 com­prehensible, simple operation of the software. The
graphic representation of mixer functions is particu-

mc- 3 2 HoTT is equipped with two dis-

larly 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 specifi c technical terms, like transmitter con­trol, dual rate, butterfl y, 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 68. This will
help you learn the essential operating techniques and
functions of the

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
eration of remote control systems.

mc- 3 2 HoTT.

mc- 3 2 HoTT, the newest gen-

Kirchheim-Teck, july 2015

Remote control set description

12

mc-16 and mc-20 series computer systems

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

• Integrated Graupner HoTT 2.4 GHz transmission
system

• The high-speed primary processor is used for data
transfer, ensuring ultra-fast response times. No
additional delays through detours via a module
processor.

• 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 fi les, model programming data and sup­plementary functions such as transmitter fi rmware
updates.

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

• 6 different languages (Dutch, English, French,

Technology that enthralls.
The superior functional security of Graupner

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.

Simpli ed programming using capacitive touch-

buttons on the
buttons on the mc-16 HoTT.

mc- 2 0 HoTT and four-way push-

High-contrast eight-line graphic screen provides
a clear display of all set-up parameters. Switch­able blue backlighting. The
tures 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  rmware up-

dates.

mc- 2 0 HoTT fea-

German, Italian and Spanish) available per soft­ware update.

• Simplifi ed 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)

Remote control set description

13

Computer System mc-32

32 channel remote control set in 2.4 GHz Graupner-HoTT technology
(Hopping Telemetry Transmission)

• As many as four servos can be controlled simulta­neously as a block in the SAME operating mode
with a servo cycle time of 10 ms (digital servos
only).

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

• Real-time telemetry evaluation in the transmitter
display Additionally, telemetry data can also be
selectively displayed by the SMART-BOX.

Additional HoTT features of the

• Super-fast response time through use of a fast
main processor for data transmission.

• Micro-SD card for storage of telemetry data and
for additional functions

• Obsolescence-proof through update capability over
USB interface as well as via the micro-SD card

• The included Lilo battery (changes reserved) has
a capacity of over 6000 mAh. This makes extreme­ly long fl ight times possible and also reduces the
number of charging repetitions.

• Modulation changeover per software: e. g. from
"EXT. PPM" (e. g. Weatronic) to HoTT at the press
of a button.

• 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

• 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

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

• Digital trimming with pseudo »analog« endless
pinions, effective per specifi c fl ight-phase

Remote control set description

14

mc- 3 2

• Auto-trim function. The current stick positions
for trimming fi xed-wing or helicopter models will
be stored in trim memory at the press of a but­ton. (Model »compensation«, activate switch and
release stick. The correction will be blended in
»gently« upon return of the stick.

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

• 16 control functions maximum

• Simplifi ed arrangement of operating elements,
such as sticks, external switches, proportional
controls and trim levers as control functions

• Protection against obsolescence is provided by
virtue of a fast 32-bit operating system with mod­ern fl ash memory that can be updated.

• Blue back-lighted MULTI-DATA-GRAPHIK-LCD
monitor with signifi cantly better legibility under
unfavorable light conditions

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

• Twelve freely programmable mixers for fi xed-wing
or helicopter models, each with freely selectable
input and output functions; four curve mixers with
innovative 8-point curve technology for easy to set
and adjust curve values at up to eight points for
throttle, pitch, tail or other non-linear character­istics. The arithmetic unit in the CPU employs an
ingenious method of calculating polynomial ap­proximations for truly-rounded, ideal MPC (multi­point curve) mixer curves

• Shifting curve mixer points can be done along
both axes with the CAP touch pad keys

• Eight fl ight-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 16
servos with a total of 96 setting options

• SUPER-DUAL-RATE, EXPO and EXPO/DUAL­RATE menu with 36 potential setting variants for
three servo functions and six fl ight phases

• Practice-optimized multi-function menu for aero­foils and helicopter models. Entry of the number
of aileron and fl ap servos automatically programs
all necessary mixer functions in the multi-function
"Wing mixers" menu. Differential aileron mixer,
butterfl y mixer, dual-fl ap mixer, automatic gyro set
function and other special functions

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

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

• A convenient timers menu with a system of eight
stopwatches, alarm timer, countdown timer, laps
counter and so on. Two running timers and one lap
timer can be displayed at the same time in large
characters.

• Stopwatch with history: In addition to the lap coun­ter there is a "Time 1" which captures the switch­on time and a "Time 2" which records the ON and
OFF times separately

• 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

• A slot for FAT or FAT32 formatted SD and SDHC
memory cards is available on the transmitter for
log files and model programs

Model programs

• Transmitter operating time 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

• 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).

Ten additional, user definable phase names: aside
from the prescribed flight phase names, the user
can also freely assign up to ten phase names of
his own choice.

• Enhanced transmitter control menu: option to as­sign input-side mid-point setting for C1 control +
trim as a transmitter control. A single input can be
assigned to two switches for a true 3-way switch
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

• »Info« sub-option in the Base setup model menu
Any kind of additional information about every

model can be entered here. This additional in­formation will then appear in the newly designed
model select function

• »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.

• Servo-middle setting range extended to ±125 %

• Number of flight phases: (fixed-wing: 8, helicopter:
7 + AR)

• Settable »Throttle too high« warning threshold
in the helicopter menu, programmable switch-on
warning

• Phase trim for all axes of fixed-wing models possible

• Servo occupancy swap on the receiver output

• CAP TOUCH operating elements with key lock
function to prevent unintentional operation.

• CAP TOUCH display change from the main menu
to the telemetry main menu via ESC.

• Numerous telemetry displays, programming func­tions and evaluation functions are presented
directly in the transmitter's screen

• Graphic presentation of model icons for the model
type display (fixed-wing/helicopter)

• Built-in connector sockets for PC-USB interface,
headset, SMART BOX, external RF module,
DSC system. Prepared for teacher/pupil operation.

• Teacher/pupil system with or without cable for
complete transfer; all settings are made on the
teacher transmitter.

Additional functions

• Super Fast response time by using the fast main
processor for data transmission

• Binding of any number of receivers for channel
expansion

• Range: test and warning function

• Low voltage warning

• Selectable cycle time 10ms or 20ms / 30ms,
depending on the receiver and connected thereto
servo and transmitter-side mode

• Up to four servos in the SAME mode blocks with
a signal repetition time of 10 ms are driven simul­taneously (only digital servos!)

• The reduced cycle time of up to 10ms an ex­tremely short reaction time is achieved.

• Telemetry analysis in the transmitter display in
real time. In addition, the telemetry data can be
displayed either with the SMART-BOX.

• Numerous Telemetry displays, programming and
evaluation functions directly in the transmitter
display

• Software switchable modulation: If necessary,
deactivate by pressing a button of HoTT to “EXT.
PPM“ or ”SP Mode“.

• Using Channel mapping in the receiver arbitrarily
divisible control functions.

• Select integrated rotational direction setting for
example mapped servos receiver successive

• In the receiver, programmable fail-safe “Hold”
function, “Off” or “pre-set positions” for each indi­vidual servo channel can be set separately

• Future-proof design with update fast 32-bit oper­ating system with modern Flash memory

Remote control set description

15

Computer System mc-32

32 channel remote control set in 2.4 GHz Graupner-HoTT technology
(Hopping Telemetry Transmission)

The set, No. 33032, includes

• Microcomputer transmitter
built-in LiIo single cell six-pack/6000 mAh/3.7 V
transmitter battery (change reserved)

• Graupner HoTT 2,4 GHz FHSS module

• integrated Bluetooth ® v2.1+ EDR module

• Electric outlet charger (4.2 V, 500 mA)

• Graupner bidirectional receiver, GR-12L HoTT
(No. S1012) for connection of up to 6 servos and
GR-32 Dual HoTT (No. 33516) for connection of
up to 16 servos

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

• Micro-SD card with an adapter for a card reader

• Sturdy aluminum transmitter case with foam cush­ioning (No. 3080)

• Graupner HoTT transmitter strap

Accessories

No.

Description

72.40 Transmitter straps, deluxe

Teacher/pupil cable for

see page 213

Replacement parts

No.

Description

71.26 Transmitter straps, Graupner HoTT

3080 Aluminum transmitter case, HoTT,

400x300x150 mm

33000.1 Transmitter battery, fl at LiIo, single cell six-

pack/6000 3.7 V TX

33002.1

33032.2 Transmitter metal hanger for mc- 3 2

33032.3 Hand rests for mc-32 (2 pieces)

33801 HoTT transmitter antenna

16

Micro-SD card, 2 GB for HoTT transmitter

Remote control set description

mc- 3 2 HoTT with

mc- 3 2 HoTT

Technical data for the

Frequency band 2.4 … 2.4835 GHz
Modulation FHSS
Transmitter power 100 mW EIRP
Control functions 16 functions, 4 of these can be

Temperature range -10 … +55 °C
Antenna collapsible
Operating voltage 3.2 … 4.8 V
Current draw about 500 mA
Range up to about 4 000 m
Dimensions about 252 x 252 x 60 mm
Weight about 1,685 g with transmitter

Technical data for the GR-12L HoTT receiver

No. S1012
Operating voltage 3.6 … 8.4 V*

Current draw about 70 mA
Frequency band 2.4 … 2.4835 GHz
Modulation FHSS
Antenna 1 x about 145 mm long,

Plug-in servos 6
Plug-in sensors 1 (port 5T)
Temperature range about -10 … +55 °C
Dimensions about 36 x 21 x 10 mm
Weight about 7 g

mc- 3 2 HoTT transmitter

trimmed

battery

about 115 mm of this
length encapsulated and
about 30 mm active

Technical data for the GR-32 Dual HoTT receiver

No. 33516
Operating voltage 3.6 … 8.4 V*
Current draw about 140 mA
Frequency band 2.4 … 2.4835 GHz
Modulation FHSS
Antenna 2 x 2 diversity antennas,

Plug-in servos 16
Plug-in sensors up to four sensors
Temperature range about -10 … +55 °C
Range up to about 5 000 m
Dimensions about 63 x 30 x 14 mm
Antenna length 4 x wire 145 mm (active

Weight about 24 g

*

The speci cation 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.

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

about 145 mm long, about
115 mm of this length
encapsulated and about
30 mm active

antennae 30 mm)

For your notes

17

General operating notices

Transmitter

Opening the transmitter housing

Switch off the transmitter before opening it
(power switch to »OFF«). Push both housing

base latches in the opposite the direction of
the arrow marks, toward the inside, to their limits.
Now tilt the transmitter somewhat to the rear so the
housing base can fl ip open and can be unhooked.
Close the transmitter's housing base by fi rst hooking
it to the underside, fl ip the base closed then push
both latches toward the outside. When closing the
base, pay attention that no cables are pinched.

Notes:

•

• Be sure not to touch the circuit boards

with any metallic objects. Do not touch
contacts with your fi ngers.

• Before performing any tasks inside the

transmitter, disconnect the transmitter's
battery (see next page) to avoid potential
short circuit damage to the transmitter's
circuit boards.

Make no modifi cations of any kind
to the circuit boards as this will
void the guarantee as well as the
unit's offi cial permit.

Transmitter power supply

The

mc- 3 2 HoTT transmitter is equipped with a

high-capacity, rechargeable LiIo 1s6p/6000 3.7 V
TX battery (No. 33000.1) as standard equipment.
(changes 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 the voltage level preset in the "Battery
warning" line of the »General basic settings« menu,
page 279, (default setting 3.60 V) is underrun, an
acoustic signal will be sounded and a warning mes­sage will appear in the display.

Stoppuhr

Batt must

0

be re-

Flugzeit

charged!!

K78

V

M

#01

0:00h

0:00h

3.5V

0

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

Note:

Be sure the correct battery type is set in the
»General basic settings« menu, page
260! The standard setting for this is

"Lith.".

0:00.0
0:00.0

00

Charge the transmitter battery with the plug-in
charger.

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 (No. 32032.4).

Depending on the state of discharge, the included
plug-in charger (4.2 V/500 mA) requires up to about
15 hours to fully recharge the transmitter battery.

Never use plug-in chargers from other manu­facturers or chargers intended for other bat-

tery types. Charger output voltage which is
too high or possibly even different plug polarity, see
further below, can cause immense damage. We
recommend that this plug-in charger be appropriately
labelled.

Also observe the safety notices provided on pages
4 … 7.

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.

General operating notices

18

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, No. 3022 is additionally needed for the transmitter
and charger cable, 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.

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

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 confi guration notices for the charger
used.

First connect the charger cable's banana
plugs to the charger and only then con-

nect 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- 3 2 HoTT charging jack polarity

The charger cables on the market from other manu­facturers often have different polarities. Therefore use

integr. balancer

only an original Graupner charger cable, No. 3022.

Removing the transmitter's battery

To remove the transmitter's battery, fi rst unlatch the
cover of the battery compartment on the rear side of
the transmitter housing then remove the cover.

Battery connector

Take out the transmitter's battery then disconnect the
transmitter battery's connector by carefully pulling on
the supply line cable.

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

Transmitter
connector polarity

(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
signifi cantly higher than when the transmitter was last
used, e. g. because the battery was charged.

#01

4.1V

0

0:00h

Stop watch

Flight tim

0:00h

K78

V

M

0

General operating notices

0:00.0
0:00.0

00

19

Lithium battery CR 2032

On the side of the transmitter board opposite the
transmitter battery there is a fi xture containing a
lithium battery, type CR 2032, which can be replaced
by the user.

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.

General charging instructions

•

•

ter, the transmitter charging current should gener­ally not exceed 1.5 A. Limit the charge current if
necessary.
If the transmitter battery is charged with more
than 1.5 A, it must be charged outside of the
transmitter. Otherwise, the printed circuit board
may be damaged from overloading the printed
connectors and/or overheating the battery.

• Perform a few test charges to make sure that the
automatic cutoff of automatic chargers works.
This is especially true when you want to use an
automatic charger to charge the NiMH battery
which comes standard in the mz-18 HoTT trans­mitter, or the lithium battery which comes stand­ard in the mz-24 HoTT transmitter. Monitor the
cutoff behaviour if the charger that you are using
has this option.

• Do not discharge the battery or run battery care
programs using the charging socket. The charg­ing socket is only for charging.

• Always fi rst connect the charging cable to the
charger, and then connect it to the receiver or
transmitter battery. This prevents unintentional
short-circuiting with the bare ends of the charging
cable plug.

• If the battery becomes hot, check the battery and
exchange it or reduce the charging current.

• Do not charge the batteries without
monitoring them.

• Follow the safety instructions and han­dling guidelines starting page

Follow the charging instructions of the
charger manufacturer and battery manu­facturer.

Do not exceed the maximum permissible
charging current of the battery manufac­turer. To prevent damage to the transmit-

Stick length adjustment

The length of both sticks 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 stick's end to the
desired length. When the length is suitable, tighten
the counter-locked threads of the upper and lower
sections again.

General operating notices

20

Stick conversions

Neutralization

Both the left and the right stick can be confi gured for
neutralized or non-neutralized operation. Open the
transmitter.

To change the stick's factory setting, locate the screw
shown in the fi gure below enclosed in a white circle.

Note:

The aggregate for the right stick is a mirror
image of the left stick so the corresponding
screw for the right stick is on the right side

just below the middle.

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

Brake spring and ratchet

The outboard screw of the two marked in the next
fi gure adjusts the braking force and the inboard screw
adjusts the strength of the ratchet for the respective
stick.

Note:

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

Stick restoring force

The stick'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 fi gure 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

Note:

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

General operating notices

21

Holder bracket for transmitter straps

A stable transmitter hanger for fastening neck straps
is standard equipment on the

mc- 3 2 HoTT trans-

mitter.
To unfold the holder brackets, fi rst press both brack-

ets inward a bit near where they are lettered then turn
them upward by 90 °. The brackets will automatically
lock into position.

If you have a neck strap fastened to the holder brack­et with key-rings, fi rst press lightly on the right holder
bracket to release its latch so it can be folded down
then do the same with the left holder bracket. After­ward, press both brackets SIMULTANEOUSLY into
the recess.

The following straps are available as accessories:

No. Description

71.26 Transmitter straps, Graupner HoTT

72.40 Transmitter straps, deluxe

Installation of switches, switch modules and knob
modules

There are a total of 20 holes in the transmitter's hous­ing available for mounting accessory modules.

ATTENTION:

To be safe, always disconnect the transmitter
battery before installation to avoid short cir-

cuit conditions. Be sure to pay attention that
soldered points on the transmitter board do not come
into contact with metal objects!

Unoccupied holes in the transmitter's housing are
closed with blind plugs. These can easily be pulled
out from the outside with one's fi ngernails.

Insert the accessory switch, etc. through a hole in the
housing from the inside.

Accessory switches, potentiometers, etc. are fastened
into place by screwing a nut onto the threaded shaft
protruding though the housing and tightening it with
a suitable wrench. If the control has a knob, it can be
reattached after the nut is tightened down. Trim nut
wrench (No. 5733) is well suited for tightening down
these nuts.

Aligning the antenna

The removable, articulated antenna is to be screwed
into the ball-joint connector then aligned by hand.

The antenna exhibits very limited fi eld strength
straight out from its end, pointing it directly toward the
model is wrong.

ATTENTION:

When screwing in the antenna, pay attention
that the centre pin in the antenna socket does
not get bent or pressed back in the socket.

General operating notices

22

Trim nut wrench (No. 5733) is well suited for
tightening down switch element trim nuts.

Transmitter description

Front side

Antenna

removable antenna, with kink and twist joint

Connector sockets
on the face side, protected by a cover, see beginning
page 24

Function modules

Drum roller control: left "Tv5", top "Tv3", right "Tv1"

Function modules

Knob control (depressible): left "Tv4", right "Tv2"

Option locations

for retrofi tting the transmitter with switches and knob
modules 8 switches included as standard equipment

Function module

rotary control: left-side "Lv2",
right-side "Lv1"

Function modules

three sliders, "Sl1", "Sl2", "Sl3"

Digital trim

For the fi ne-tuning of servo positions
(travel neutralization). When turned, each click
produces an increment of adjustment (position
indicator in display). A press on the trim wheel
will reset the trim adjustment.

LC Display (more details available on page 30.)
Telemetry indicators: receiver parameters,
standard. Other indicators dependent on the
data from the optional sensors connected.

Loudspeaker

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

Note:

Always switch on the transmitter then the receiver.
When switching off,  rst switch off the receiver then
the transmitter.

LED indicators

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

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

Stick

Two sticks for a total of four independent control
functions. The length of the sticks 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 stick can be
converted from neutralizing to non-neutralizing,
see page 21.

v

left touch pad:

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

= scroll in one of the four directions with every

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

+

telemetry menu and basic display

tap (, , , )

display

simultaneous vertical tap of the left
() keys + "SET" of the right touch
pad = changeover to the "secret
options", see page 35.

LC Display (more details available on page 30.)
Contrast adjustment: a simultaneous tap on
() + "SET" of the right touch pad = change
to "secret options"

Warning indicators:

• for underrun of preset battery voltage threshold

• for fault function of the teacher/pupil system

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

• …

right touch pad:

SET = select/confi rm

= scroll or change value with every touch of one

Circle with the fi nger around the circumference
= scroll/change values. Alternative values

or

Transmitter description - Front side

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

selection with the left touch pad (, , , )

simultaneous tap on 
or  = CLEAR

23

Face-side connections

Charger jack

The mc- 3 2 HoTT transmitter's charger jack be­comes accessible after turning the left face-side cover
away.

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 (No. 32032.4).

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 18. Observe the safety
notices on pages 8 … 10 when handling lithium bat­teries.

DSC / Direct Servo Control

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 face-side cover has been moved away,

mc- 3 2 HoTT transmitter's DSC socket is ac-

the
cessible:

The standard two-pole DSC jack in the mc-32
HoTT transmitter is used as the teacher or pupil jack
as well as an interface to fl ight simulators or external
RF module.

To ensure a proper DSC connection, please observe:

1. Make any necessary menu changes.
Refer to the section beginning on page 226 to

adapt the
pupil system.

2. When operating a fl ight simulator or when
operating the
pupil transmitter, ALWAYS leave the transmitter's
ON/OFF switch in the "OFF" position 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 "
constantly illuminated and the transmitter's basic
display should show the character string "DSC"
below the operating time clock. At this time, the

mc- 3 2 HoTT transmitter to a teacher/

mc- 3 2 HoTT transmitter as a

Battery

" LED should remain

display of telemetry data and symbols will be
suppressed.

Stop watch

0:00h

#01

0:00h

4.1V

0

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

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
securely 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 89 or 100 or the line "Pre-set DSC

Output" in the »General basic settings«, page
277, – 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  ight simulators:

•

the audio plug or DSC module appropriately

modi ed by Graupner Service.

Because of the myriad of  ight simulators
available on the market, it may be
necessary to have the contact layout of

DSC

mc- 3 2 HoTT transmitter

Flight tim

K78

0

0:00.0
0:00.0

00

Transmitter description - Face-side connections

24

Mini-USB connector

Data jack

CAUTION:

For direct connection of your transmitter to a
PC or a laptop via cable (DSC-cable) and / or

PC interface for your simulator it may
possibly result in destruction of the transmitter by
electrostatic discharge! This type of connection may
therefore only be used if you are, for example, using

a grounding strap against electrostatic discharge

protection (commercially available in electronic
shops) during the simulator operation. Therefore

Graupner strongly recommends to use only

simulators with wireless transmission technology.

Connector jack for software updates as well as
for changing date and time from a PC with a Win­dows XP, Vista or 7 operating system.

The USB cable, 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 in next paragraphs.

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 286.

The so-called "DATA jack" is located at the right of
this group of connector sockets.

This jack is intended for connection of the optional
Smart-Box, 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 86 and 96.

The operation of a Smart-Box or a Bluetooth
module, see below, is generally not possible

in the “SP mode”.
Firmware version V1102 or higher
From fi rmware version V1102 to the Data jack can

be connected now not only the Smart-Box or alter­natively an external RF module, but also the external
Bluetooth module of MZ transmitter, No. 8351 will
be operated. For details on switching between the
respective operating modes of the socket, see “Data
sel.” Description of the menu “General. Settings“on
page 280.

Transmitter description - Face-side connections

25

Card slot

micro SD and micro SDHC

mc- 3 2 HoTT transmitter's card slot for type

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

All conventional micro SD memory cards up to 2 GB
and micro SDHC cards up to 32 GB storage capacity
can be used. 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 fl ap can be closed again.

The stylized image of a memory card will appear in
the basic setup screen to indicate the presence of the
inserted memory card.

Stop watch

#01

0:00h

0:00h

4.1V

0

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 fl ight timer. If this timer is start-

ed – 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 fl ight timer is stopped.
The fl ight timer is started and stopped as described in
the section "Timers (general)" on page 165.

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

After a data acquisition session is fi nished, there will
be an (empty) folder “Models” and a “LogData” folder
on the memory card. Within the “LogData” folder there
will be log fi les, that are designated with names in the
format 0001_year-month-day.bin, 0002_year-month­day.bin, etc., in sub-folders named “model name”.

Flight tim

0

K78

V

RX VOLT 4.8V

M

) which grows

0:00.0
0:00.0

00

If a model memory is still “unnamed” the respective
log fi les 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  les

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 35.

Transmitter  rmware updates

The transmitter fi rmware can be updated and – if
necessary – replaced at this menu point, using the
procedure described in the previous section entitled
“Importing voice fi les”; 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 35.

In addition to a German can be found on the supplied
standard SD card at the time of revision of this guide
as an English, French, Dutch, Italian and Spanish
fi rmware version.

Corresponding updates and information, visit the
product page of each HoTT transmitter on www.
graupner.de.

Transmitter description - Face-side connections

26

Headset connector

EXT.PPM

Important notes:

• Any claims will not be considered
without the presence of a log fi le.
For the same reason the

transmitter must always be updated to
the latest software version. Keep in
mind, however, that for technical
reasons during playback of MP3 fi les
NO data recording is possible.

•

graupner.de/de/service/
produktregistrierung.aspx. Thus, you
will be automatically notifi ed via email
about new updates.

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 74.

Note:

 le system used by the memory cards and these
special symbols will be replaced during the copy
process with a tilde (~).

To be always informed about
important software updates, you
should register at https: // www.

Some special symbols that can be used in
model names are subject to speci c

restrictions associated with the FAT or FAT32

Once the right face-side cover has been moved away,

mc- 3 2 HoTT transmitter's headset connector is

the
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.

Stop watch

#01

0:00h

0:00h

4.1V

0

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 35 and »Te-
lemetry« beginning on page 244.

The volume of signals and voice output sent to
the headset can be adjusted individually in the
lines "Voice volume", "Vario volume", and "Touch­beeps vol." of the »General basic settings« menu,
page 275.

Flight tim

0

K78

V

RX VOLT:4.8V

M

0:00.0
0:00.0

00

An external RF module, for example a WEATRONIC
module, can be connected to this jack, see illustration
below.

An external RF module, for example a WEATRONIC
module, can be connected to this jack.

If an external RF module is attached, then switching
between the external module and the internal HoTT
RF module is accomplished in the "Module" line of
the »Basic settings, model« menu, page 83 or 94,
by selecting either "HoTT" or "EXT.PPM". If neces­sary, the signal provided on this connection can be in­verted by selecting the appropriate option for the line
"ext. PPM signal" in this same menu, see page 87 or

96.

Note:

The "INT PPM" socket located inside the
transmitter is also suitable for this purpose.

However, a connecting cable must be passed
through to the outside of the transmitter housing by
way of one of the module openings originally intended
for a switch.

Transmitter description - Face-side connections

27

SPI

The designation "SPI" stands for an interface for
future applications. This socket is currently non-func­tional and may not be connected.

Transmitter description - Face-side connections

28

Bottom side transmitter interior

INT PPM plug-in location

One free plug-in location for connecting
an additional – internal – RF module

Plug-in location

Three free plug-in locations for proportional
rotary control modules.

Plug-in locations

Six free plug-in locations for additional
switches are standard, see page 23

These switch plug-in locations can
be used in any sequence.

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 ot described are to
be left unconnected.

Plug-in locations (UVR, 5-pole)

eight free plug-in locations for future
rotary control installations.

Transmitter battery

Observe charging rules, see page 18

Transmitter battery plug

For charging the battery and a list of suit­able automatic chargers, see page 19

Lithium battery CR2032
(not rechargeable)

Independent backup for the transmitter's

date and time settings, see »Info display«
menu on page 286.

Transmitter description - Bottom side transmitter interior

29

Display and keypad

left touch pad:

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

= scroll one of the four directions with every tap:

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

+

telemetry menu and basic display

(, , , )

display

simultaneous vertical tap of the left ()
keys + "SET" of the right touch pad =
changeover to the "secret options", see
page 35.

Model memory location 1 … 80

Model type indicator
winged model, helicopter

Owner name

Model name

Model operating time

Operating mode
HoTT/PPM

No

pupil

signal!

Throttle

too

high!

Batt. must

be re-

charged!!

Fail Safe

setup

t.b.d.

A selection of potential warnings and notices. More about this on page 33.

Flight timer in min:s

Stopwatch in min:s
(upward/downward)

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.)

micro-SD card inserted

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

30

M=Model
operation
P = Pupil
(pupil trans-
mitter)

Signal strength

Graupner|SJ logo or
fl ight phase name

Receiver battery
voltage RX-SPG

right touch pad:

SET = select/confi rm

= scroll or change value with every touch of one

Circle with the fi nger around the circumference
= scroll/change values. Alternative values

or

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

selection with the left touch pad (, , , )

simultaneous tap on 
or  = CLEAR