GRAUPNER mx-24s Programming Manual

Contents

Program descriptions in detail

Page Page

Memories

Model select 59 59 Copy / Erase 60 60 Suppressing codes 62 62 Suppressing models 62 62

Basic transmitter, model and servo settings

Base setup model 64 66 Model type 70 Helicopter type 72 Servo adjustment 74 74

Transmitter controls

Stick mode 76 77 Transmitter control settings 78 80

Throttle limit 82 Dual Rates / Exponential 86 88 Channel 1 curve 90 92

Switches

Switch display 93 93 Control switches 94 94 Logical switches 97 97

Flight phases

How do I program a ﬂ ight phase? 98 98 Phase settings 100 102 Phase assignment 104 104 Phase trim F3B 105 Non-delayed channels 105 105

Page

Timers

Timers (general) 106 106 Flight phase timers 108 108

Mixers

What is a mixer? 110 110 Wing mixers 110 Helicopter mixers 122

Setting up the throttle and collective pitch curve

129

Auto-rotation 132

General notes on freely programmable mixers

134

134 Free Mixers 135 135 MIX aktive in phase 142 142 Mix only channel 142 142 Dual mixers 144 144 Swashplate mixers 145

Special functions

Fail-Safe settings, PCM 20 146 146 Fail-Safe settings, SPCM 20 148 148 Fail-Safe settings, APCM 20 149 149 Trainer (teacher / pupil) mode 150 150 Receiver output swap 153 153

Global functions

General basic settings 154 154 Servo display 156 156 Servo test 156 156 Code lock 157 157

General notes

Safety notes ............................................................... 4

Foreword ....................................................................7

mx-24s Computer System ....................................... 8

Operating notes .......................................................12

DSC socket .............................................................. 18

Description of transmitter ......................................... 20

Description of screen ............................................... 22

Using the system for the ﬁ rst time ........................... 23

Preliminary notes ................................................ 23

Selecting the language ....................................... 23

Frequency scanner ............................................. 24

Selecting the channel ......................................... 25

Receiving system ....................................................26

Installation notes ................................................27

Deﬁ nition of terms ................................................... 28

Signal ﬂ ow chart ................................................. 29

Basic operations ...................................................... 30

Button pad .......................................................... 30

Rotary control ..................................................... 30

Hotkeys ............................................................... 30

Menu settings ..................................................... 31

Assigning transmitter controls,

switches and control switches ................................. 32

Digital trims / Cut-off trim ......................................... 34

Fixed-wing model aircraft ........................................36

Receiver socket sequence .................................37

Model helicopters ....................................................42

Receiver socket sequence .................................43

Programming – a brief introduction

Brief programming instructions ................................ 44

Program descriptions

Setting up a new model memory ............................. 58

Programming examples

Fixed-wing models (general) ................................. 158

Fixed-wing model gliders ....................................... 160

Including an electric power system ........................ 165

C1 stick doubling as control for:

Electric motor and butterﬂ y (crow) .................... 167

Electric motor and airbrakes ............................. 169

Operating timers using a stick function or switch ...170

Servos running in parallel ...................................... 172

Two airbrake or spoiler servos .......................... 172

Multi-motor power models ................................ 172

Two elevator servos .......................................... 173

Two rudder servos ............................................ 173

Using ﬂ ight phases ................................................ 174

Controlling timed sequences ................................. 182

Eight-ﬂ ap wing .......................................................184

Delta / ﬂ ying wing model aircraft ............................ 188

F3A models ...........................................................192

Model helicopters ..................................................196

Appendix

Trainer system accessories ................................... 204

Transmitter accessories ......................................... 205

Approved operating frequencies ............................ 206

Conformity declaration ........................................... 207

Index ...................................................................... 208

Guarantee certiﬁ cate ............................................. 215

Contents

Notes on environmental protection

The presence of this symbol on a product, in the user instructions or the packaging, means that you must not dispose of that item, or the electronic components contai-

ned within it, in the ordinary domestic waste when the product comes to the end of its useful life. The correct method of disposal is to take it to your local collection point for recycling electrical and electronic equipment.

Individual markings indicate which materials can be recycled and re-used. You can make an important contribution to the protection of our shared environment by re-using the product, recycling the basic materials or re-processing redundant equipment in other ways.

Dry cells and rechargeable batteries must be removed from the device and taken separately to a suitable battery disposal centre.

If you don’t know the location of your nearest disposal centre, please enquire at your local authority ofﬁ ce.

Environmental protection notes

We all want you to have many hours of pleasure in our mutual hobby of modelling, and safety is an important aspect of this. It is absolutely essential that you read right through these instructions and take careful note of all our safety recommendations.

If you are a beginner to the world of radio-controlled model aircraft, boats and cars, we strongly advise that you seek out an experienced modeller in your ﬁ eld and ask him for help and advice.

These instructions must be handed on to the new ow-

ner if you ever sell or dispose of the transmitter.

Application

This radio control system may only be used for the

purpose for which the manufacturer designed it, i.e. for operating radio-controlled models which do not carry humans. No other type of use is approved or permissible.

Safety notes

SAFETY IS NO ACCIDENT

and

RADIO-CONTROLLED MODELS ARE NOT

PLAYTHINGS

Even small models can cause serious personal injury and damage to property if they are handled incompetently.

Technical problems in electrical and mechanical sys-

tems can cause motors to rev up or burst into life unexpectedly, with the result that parts may ﬂ y off at great speed, causing series injury.

Short-circuits of all kinds must be avoided at all times. Short-circuits can easily destroy parts of the radio control system, but even more dangerous is the acute risk of ﬁ re and explosion, depending on the circumstances and the energy content of the batteries.

Propellers (aircraft and boat), helicopter rotors, open gearboxes and all other rotating parts which are driven by a motor or engine represent a permanent in-

jury hazard. Do not touch these items with any object or part of your body. Remember that a propeller spinning at high speed can easily slice off a ﬁ nger. Ensure that no other object can make contact with the driven components.

Never stand in the primary danger zone, i. e. in the rotational plane of the propeller or other rotating parts, when the motor is running or the drive battery is connected.

If an internal-combustion engine or electric motor is connected to the system, take great care to avoid any possibility of it bursting into life when you are programming the transmitter. We recommend that you disconnect the fuel supply or the drive battery beforehand.

Protect all electronic equipment from dust, dirt, damp, and foreign bodies. Avoid subjecting the equipment to vibration and excessive heat or cold. Radio control equipment should only be used in “normal” ambient temperatures, i. e. within the range -15°C to +55°C.

Avoid subjecting the equipment to shock and pressure. Check the units at regular intervals for damage to cases and leads. Do not re-use any item which is damaged or has become wet, even after you have dried it out thoroughly.

Use only those components and accessories which we expressly recommend. Be sure to use only genuine matching GRAUPNER connectors of the same design with contacts of the same material. If you are still using plug-in crystals, use only genuine GRAUPNER crystals on the appropriate frequency band.

When deploying cables note that they must not be under tension, and should never be bent tightly or kinked, otherwise they may fracture. Avoid sharp edges which could wear through the cable insulation.

Check that all connectors are pushed home ﬁ rmly before using the system. When disconnecting components, pull on the connectors themselves – not on the

wires. It is not permissible to carry out any modiﬁ cations

to the RC system components. Avoid reverse polarity and short-circuits of all kinds involving the connecting leads, as the equipment is not protected against such errors.

Installing the receiving system and deploying the receiver aerial

In a model aircraft the receiver must be packed in soft foam and stowed behind a stout bulkhead, and in a model boat or car should be protected effectively from dust and spray.

The receiver must not make contact with the fuselage,

hull or chassis at any point, otherwise motor vibration and landing shocks will be transmitted directly to it.

When installing the receiving system in a model powered by a glowplug or petrol engine, be sure to install all the components in well-protected positions so that no exhaust gas or oil residues can reach the units and get inside them. This applies above all to the ON / OFF switch, which is usually installed in the outer skin of the model.

Secure the receiver in such a way that the aerial, servo leads and switch harness are not under any strain.

The receiver aerial is permanently attached to the re-

ceiver. It is about 100 cm long and must not be shortened or extended. The aerial should be routed as far away as possible from electric motors, servos, metal pushrods and high-current cables. However, it is best not to deploy the aerial in an exactly straight line, but to angle it: e. g. run it straight to the tailplane, then leave the ﬁ nal 10 - 15 cm trailing freely, as this helps to avoid reception “blind spots” when the model is in the air. If this is not possible, we recommend that you lay out part of the aerial wire in an S-shape inside the model, close to the receiver if possible.

Safety notes

Please read carefully!

Safety notes

Installing the servos

Always install servos using the vibration-damping grommets supplied. The rubber grommets provide some degree of protection from mechanical shocks and severe vibration.

Installing control linkages

The basic rule is that all linkages should be installed

in such a way that the pushrods move accurately, smoothly and freely. It is particularly important that all servo output arms can move to their full extent without fouling or rubbing on anything, or being obstructed mechanically at any point in their travel.

It is important that you can stop your motor at any time. With a glow motor this is achieved by adjusting the throttle so that the barrel closes completely when you move the throttle stick and trim to their end-points.

Ensure that no metal parts are able to rub against each other, e. g. when controls are operated, when parts rotate, or when motor vibration affects the model. Metal-to-metal contact causes electrical “noise” which can interfere with the correct working of the receiver.

Always extend the transmitter aerial fully before

operating your model

Transmitter ﬁ eld strength is at a minimum in an ima-

ginary line extending straight out from the transmitter aerial. It is therefore fundamentally misguided to

“point” the transmitter aerial at the model with the idea

of obtaining good reception. When several radio control systems are in use on ad-

jacent channels, the pilots should always stand together in a loose group. Pilots who insist on standing away from the group endanger their own models as well as those of the other pilots.

Pre-ﬂ ight checking

If there are several modellers at the site, check carefully with all of them that you are the only one on

“your” channel before you switch on your own trans-

mitter. If two modellers switch on transmitters on the same channel, the result is interference to one or both models, and the usual result is at least one wrecked model.

Before you switch on the receiver, ensure that the throttle stick is at the stop / idle end-point.

Always switch on the transmitter ﬁ rst, and only

then the receiver.

Always switch off the receiver ﬁ rst, and only then

the transmitter.

If you do not keep to this sequence, i. e. if the receiver is at any time switched on when “its” transmitter is switched off, then the receiver is wide open to signals from other transmitters and any interference, and may respond. The model might then carry out uncontrolled movements, which could easily result in personal injury or damage to property. The servos may run to their end-stops and damage the gearbox, linkage, control surface etc.

Please take particular care if your model is ﬁ tted with a mechanical gyro:

Before you switch your receiver off, disconnect the power supply to ensure that the motor cannot run up to high speed accidentally.

Gyros can generate such high voltages as they

run down that the receiver picks up apparently

valid throttle commands, and the motor could re-

spond by accelerating unexpectedly.

Range checking

Before every session check that the system works properly in every respect, and has adequate range.

This means checking that all the control surfaces re-

spond correctly and in the appropriate direction to the transmitter commands, at a suitable ground range. Repeat this check with the motor running, while an assistant holds the model securely for you.

Operating your model aircraft, helicopter, boat or car

Never ﬂ y directly over spectators or other pilots, and take care at all times not to endanger people or animals. Keep well clear of high-tension overhead cables. Never run your model boat close to locks and fullsize boats. Model cars should never be run on public streets or motorways, footpaths, public squares etc..

Checking the transmitter and receiver batteries

It is essential to stop using the radio control system and recharge the batteries well before they are completely discharged. In the case of the transmitter this means – at the very latest – when the message “Bat- tery must be charged” appears on the screen, and you hear an audible warning signal.

It is vital to check the state of the receiver battery at regular intervals. When the battery is almost ﬂ

at you may notice the servos running more slowly, but it is by no means safe to keep ﬂ ying or running your model until this happens. Always replace or recharge the batteries in good time.

Keep to the battery manufacturer’s instructions and don’t leave the batteries on charge for a longer period than stated. Do not leave batteries on charge unsupervised.

Never attempt to recharge dry cells, as they may explode.

Rechargeable batteries should always be recharged before every session. When charging batteries it is important to avoid short-circuits. Do this by connecting the charge lead banana plugs to the charger ﬁ rst, taking care to maintain correct polarity. Only then connect the charge lead to the transmitter or receiver battery.

Disconnect all batteries and remove them from your model if you know you will not be using it in the near future.

Safety notes

Capacity and operating times

This rule applies to all forms of electrical power sour-

ce: capacity is greatly reduced at low temperatures, i. e. operating times are shorter in cold conditions.

Frequent charging of batteries, and use of battery maintenance programs, can also result in a gradual loss of battery capacity. For this reason you should always check the actual capacity of your packs at regular intervals - every six months at least.

Purchase only genuine GRAUPNER batteries!

Suppressing electric motors

All conventional electric motors produce sparks bet-

ween commutator and brushes, to a greater or lesser extent depending on the motor type; the sparking generates serious interference to the radio control system.

In electric-powered models every motor must therefore be thoroughly suppressed. Suppressor ﬁ lters effectively eliminate such interference, and should always be ﬁ tted.

Please read the notes and recommendations supplied by the motor’s manufacturer. Refer to the main

GRAUPNER FS catalogue for more information on

suppressor ﬁ lters.

Servo suppressor ﬁ lters for extension leads

Order No. 1040 Servo suppressor ﬁ lters are required if you are obli-

ged to use long servo extension leads, as they eliminate the danger of de-tuning the receiver. The ﬁ lter is connected directly to the receiver input. In very difﬁ cult cases a second ﬁ lter can be used, positioned close to the servo.

Using electronic speed controllers

Electronic speed controllers must be chosen to suit the size of electric motor which they will control.

There is always a danger of overloading and possibly

damaging the speed controller, but you can avoid this

by ensuring that the controller’s current-handling capacity is at least half the motor’s maximum stall current.

Particular care is called for if you are using a “hot” (i. e. upgrade) motor, as any low-turn motor (small number of turns on the winding) may draw many times its nominal current when stalled, and the high current can easily wreck the speed controller.

Electrical ignition systems

Ignition systems for internal combustion engines can also produce interference which has an adverse effect on the operation of the radio control system.

Electrical ignition systems should always be powered by a separate battery – not the receiver battery.

Be sure to use effectively suppressed spark plugs and plug caps, and shielded ignition leads.

Keep the receiving system an adequate distance away from the ignition system.

Static charges

The operation of a radio control system can be affec-

ted by magnetic shock waves which are generated by lightning – even when the storm is several kilometres away. For this reason …

… if you see a storm approaching, cease opera-

tions immediately! Static charges via the transmitter aerial also constitute a lethal danger!

Caution

Radio control systems may only be operated on the frequency bands and spot frequencies which are approved for that purpose in the country in which the equipment is used. Information on this can be found in the section entitled “Approved Operating Frequencies” on page 206. It is prohibited by law to use radio control systems on any other frequency, and such misuse will be punished by the relevant authorities.

Care and maintenance

Don’t use cleaning agents, petrol, water or other solvents to clean this equipment. If the case, the whip aerial etc. should become soiled, wipe clean with a soft dry cloth.

Components and accessories

As manufacturer of this equipment, GRAUPNER

GmbH & Co. KG recommends that you only use components and accessories which have been checked by GRAUPNER and are known to work properly and reliably. If you observe this advice, GRAUPNER accepts product responsibility.

GRAUPNER does not accept liability if this equip-

ment is used in conjunction with components or accessories made by other manufacturers which have not been approved. We are not in a position to assess whether every individual product made by other companies can be used with safety.

Liability exclusion / Compensation

As manufacturers, we at GRAUPNER are not in a po-

sition to inﬂ uence the way you install, operate and maintain the radio control system components. For this reason we are obliged to refute all liability for loss, damage or costs which are incurred due to the incompetent or incorrect use and operation of our products, or which are connected with such operation in any way.

Unless otherwise prescribed by law, the obligation of the GRAUPNER company to pay compensation is limited to the invoice value of that quantity of GRAUP-

NER products which was immediately and directly in-

volved in the event in which the damage occurred.

This does not apply if GRAUPNER is found to be sub-

ject to unlimited liability according to binding legal regulation on account of deliberate or gross negligence.

Safety notes

The new mx-24s is presented in a sophisticated, ergonomically efﬁ cient hand-held case which offers maximum operating convenience and ease of transport. It represents a further development of the

mc-24

PROFI, of which many thousands are already in use by highly successful modellers. The system’s operating convenience has been further improved: the programming procedure is now even easier, using just four buttons and a digital 3-D ROTARY control knob which operates on two levels. As with its smaller sister, the mx-22, the new transmitter is easy to use even for the inexperienced modeller.

We have called upon the experience and feedback of many pilots in handling and using the mc-24 PROFI to create new ideas which have been incorporated into the overall software design of the mx-24s.

The GRAUPNER software team, collaborating with renowned top-level pilots from all over the world, and professional and competition pilots in a vast range of model ﬂ ying areas, has worked ceaselessly to produce this pioneering further development of high-end transmitter software. Teamwork and thorough testing in national and international competitions and events of all disciplines have helped to create this new system, based on the world-wide success of the mc-24 radio control system, without in any way overlooking the requirements of beginners.

The mx-24s is equipped as standard with all controls and switches required for operating up to twelve servos, which means that fans of scale models and multi-function model boats will not ﬁ nd themselves running short of functions or control options.

Another standard feature is a DSC socket for connecting a receiver directly to the transmitter, allowing working systems to be checked without the transmitter radiating an RF signal. The same socket can also be used for Trainer mode operations and for controlling ﬂ ight simulators.

The familiar modulations of PPM18, PPM24, PCM20 and SPCM 20 are now complemented by two new transmission modes:

• PPM10 for Pico-size receivers in indoor models, fun-ﬂ y aircraft, small helicopters, RC cars and other models ﬁ tted with a maximum of ﬁ ve servos. This transmission mode features a reduced cycle rate, giving extremely fast response times.

• APCM24 is for the demanding pilot who wishes to operate his models with up to twelve servos, and is designed to satisfy exacting demands on precision and identical timing of all servos – e. g. in high-speed models.

A new RF SYNTHESIZER module eliminates the need for plug-in crystals on the 35 / 35B MHz band and the 40 / 41 MHz band. The channel you wish to use is set by software, and is available for use as soon as you answer a security query. An important innovation in terms of safety considerations is the entirely new integrated dual-conversion scanner, which can be used when the transmitter is switched on to check whether a particular channel is already in use at your ﬂ ying site.

In terms of hardware, the generously sized LCD screen now features backlighting which makes the display much easier to read, especially under unfavourable lighting conditions. An EEPROM (Electrically Erasable Programmable Read-Only Memory) supersedes the Lithium data back-up battery which has been necessary until now.

The structure of the transmitter software has been further reﬁ ned: all the important adjustment facilities in each menu are now displayed on the graphic screen in a form which is virtually self-explanatory. However, if you encounter a problem and the manual is not to hand, the integral Help menu can provide additional assistance at the press of a button.

The mx-24s provides forty model memories, each of which can store model settings for up to eight ﬂ ight phases. Flight phases can be called up in ﬂ ight simply by operating a switch, so that you can try out different settings quickly and without risk. This feature can be exploited for test purposes as well as for varying ﬂ ight parameters in different phases of ﬂ ight.

mx-24s: the new generation of radio control technology

Amongst the new features of the software are:

• “Auto-Trim” function: the model is brought to the desired ﬂ ight attitude using the two dual-axis sticks. At the moment the auto-trim switch is operated, the software notes the deviations of the sticks from the neutral position, and sets them as the new trim values.

• “Swashplate limit”: this option limits the swashplate deﬂ ection when the roll (aileron) and pitch-axis (elevator) sticks are moved to their end-points simultaneously.

The software package is rounded off by a range of new, thoroughly practical features, such as a button pad lock, a variable warning threshold for the transmitter battery and a simpliﬁ ed method of switching between electric motor and airbrake control.

This manual describes each menu in detail, and also provides dozens of useful tips, notes and programming examples to complement the basic information. More general modelling terms, such as Transmitter controls, Dual-Rates, Butterﬂ y and many others, are all explained in the manual, which also includes a comprehensive index at the end. The section on pages 44 … 56 includes a quick-access overview of the essential operating procedures in tabular form.

Please read the Safety Notes and the Technical Information. We recommend that you start by checking all the functions as described in the instructions. When you have programmed a model it is important to ensure on the ground that all the programmed settings are correct before committing the model to the air. Always handle your radio-controlled model with a responsible attitude to avoid endangering yourself and others.

All of us in the GRAUPNER team wish you every success and many years of pleasure with your

mx-24s,

which is a radio control system of the very highest quality.

Kirchheim-Teck, April 2008

Foreword

mx-24s

Radio control system providing 5 to 9 control functions in PPM10 / PPM18 mode, up to 10 functions in (S)PCM mode and up to 12 control functions in PPM24 and APCM24 modes

• Four-language dialogue menu (German, English, French, Italian).

• The latest hardware and integral Synthesizer system for channel selection, with safety menu to avoid problems if the transmitter is switched on accidentally.

• Completely new “Auto-Trim” function: press a single button to adopt the current stick positions as the new neutral settings, with a gradual transition to the new trims.

• Simple method of programming the dual use of the C1 stick for controlling the motor and braking system of electric gliders.

• Display of type of modulation and spot frequency on the LCD screen.

• Automatic transmitter control assignment by operating the control itself.

• Forty model memories.

• Update-capable software ensures that the transmitter has an extended future life.

• 3-D cylinder rotary encoder in conjunction with four programming buttons provides accurate adjustment facilities and excellent programming convenience.

• High-resolution MULTI-DATA GRAPHIC LCD screen with grey-scales provides superb monitoring facilities, accurate graphical representation of curves, characteristic lines, spot frequency etc..

• Screen backlighting variable in the »General basic settings« menu.

• New type of switch monitor for checking all physical and control switches.

• CONVENIENT MODE SELECTOR provides a simple means of switching between stick modes 1 to 4 (e. g. throttle right / throttle left).

• Real Time Processing (RTP). All selected settings

Fantastic technology

GRAUPNER’s new

mx-24s sets new standards in

high-end radio control technology. The programs included in the mx-24s professional system constitute a further milestone in radio control technology for the beginner and pro-standard pilot alike.

A PLL Synthesizer RF module with integral frequen-

cy scanner provides a fast, safe method of switching 8

Description of radio control system

channels.

The proven, highly practical dual-function rotary enco-

der with 3-D rotary select programming technology is ultra-simple to use in combination with modern, logically structured, clearly laid-out software.

mx-24s: radio control technology which is sheer ple-

asure to use!

and changes take immediate effect at the receiver output, virtually in real time.

• Digital Trim system for all four stick trim functions, effective globally or separately for each ﬂ ight phase, variable separately for each function, with adjustable trim increment and instant-effect throttle / idle trim.

• Six switchable types of modulation:

PPM10 Super-fast modulation for Pico-size receivers, sui-

table for controlling up to ﬁ ve servos. Ideal for RC cars, indoor models, fun-ﬂ y aircraft etc..

PPM18

The most widely used standard transmission pro-

cess (FM and FMsss). For C 6, C 8, C 12, C 16, C 17, C 19, DS 18, DS 19, DS 20 receivers, and XP 4, XP 8, XP 10, XP 12, XN 12, XM 16, R16SCAN, R 600 light, R 600, R 700, C 6 FM, SB6 SYN 40 S, SR6SYN miniature receivers.

PPM24

Multi-servo PPM transmission mode for simulta-

neous operation of up to twelve servos. For the DS 24 FM S receiver.

PCM20

PCM with system resolution of 512 steps per con-

trol function. For mc-12, mc-20, DS 20 mc receivers.

SPCM20

Super PCM modulation with high system resolu-

tion of 1024 steps per control function. For smc-

14 S, smc-16 SCAN, smc-19, smc-19 DS, smc-20,

smc-20 DS, smc-20 DSYN, smc-20 DSCAN receivers.

APCM24

Advanced PCM modulation with high system reso-

lution and ultra-fast transmission process, for amc

receivers. Capable of controlling up to twelve servos.

• Twelve freely programmable mixers for ﬁ xed-wing models and helicopters with freely selectable input and output function, four of which exploit a new type of eight-point curve technology which is freely variable in 0.5% increments. Using ingenious polynomial approximation techniques an ideally rounded mixer curve can be generated from the selected mixer reference points simply by pressing a button.

• The eight-point throttle and collective pitch curves available in the helicopter menu also feature a multi-point curve system (MPC). Once again an ideally rounded curve can be generated, based on your selected mixer reference points.

• Four dual mixers.

• Eight ﬂ ight phase programs for ﬁ xed-wing model aircraft, and seven + auto-rotation for model helicopters. These can be adjusted individually to suit particular models, and assigned names and separately programmable transition times.

• Super-menu for servos, providing a full overview of all servo set-up data and simple correction of four parameters (direction of rotation, centre position, servo travel separately in both directions, and servo limit variable separately in both directions, for all twelve servos).

• Super Dual Rate / Expo menu for three control functions and eight ﬂ ight phases. Variable separately in each model memory, and switchable in ﬂ ight.

• Expanded transmitter control menu: centre adjustment at input end. The side-mounted proportional controls, the INC / DEC buttons, the C1 control and all the switches can be assigned as transmitter controls.

• Highly practical, sophisticated multi-function menu

Description of radio control system

for ﬁ xed-wing models and helicopters. Entering the number of aileron and camber-changing ﬂ ap servos automatically programs all the requisite mixer functions in the multi-function wing menu.

• Re-designed multi-ﬂ ap menu, providing an ultrasimple, clearly laid-out means of setting up a maximum of six wing-mounted servos, variable separately for each ﬂ ight phase, even without the use of supplementary free mixers.

• Helicopter swashplate mixer for one-point, twopoint, three-point and four-point linkages.

• Swashplate servo linearisation function: electronic compensation for non-linear travel of rotary-output swashplate servos.

• Swashplate limiting: limits the angle of tilt of the swashplate when roll and pitch-axis commands are applied simultaneously.

• Tailplane types: normal, V-tail, delta / ﬂ ying wing and 2 EL Sv 3 + 8 (which provides a standard means of controlling two linked elevator servos without the use of free mixers or dual mixers).

• Number of wing ﬂ aps: 2 AIL / 4 FL: full support for six wing-mounted servos, now also without the use of free mixers.

• Switchable delay for ﬂ ight phase change-over switches: the transition time can be switched off for individual channels in individual ﬂ ight phases; e. g. for motor OFF in electric-powered models, and for heading lock activate / disable in model helicopters.

• Ten supplementary user-deﬁ ned phase names: in addition to the default ﬂ ight phases the user can enter ten phase names of his own choice.

• Model copy function for all model memories.

• Copy all models  PC. All occupied memories can be backed-up to a PC using a single command.

• Integral socket accepts an optional interface mo-

dule for copying between two mx-24s transmitters or between an

mx-24s and a PC.

• “Info” in the »Base setup model« menu: a small amount of supplementary information can be entered at this point for each model (max. ﬁ fteen letters or symbols); this information then appears in the revised Model Select menu.

• Logical switches: this function makes it possible to link two switches using an “AND” or “OR” function; the result can then be used as a virtual switch.

• Variable warning threshold for power-on “Throttle too high” warning in the Helicopter menu.

• Fail-Safe monitor for eight servo functions; for up to twelve servos in APCM24 mode.

• HELP button provides valuable hints on programming and currently selected programming menu. Leaf through the Help pages using the HLP button or the rotary control.

• Convenient Timer menu: system includes eight stopwatches, alarm timer, count-down timer, lap counter etc., two time values and one lap time value can be displayed on-screen simultaneously in a large typeface.

• Stopwatch with History function: the lap counter is complemented by “Time1”, which records poweron times, and “Time2”, which records the ON and OFF switched times separately.

• Highlighted display of timer over-runs are more easily picked out by the user.

• Revised CLEAR function for the timers: even if individual times are still running, CLEAR still resets the remaining timers.

• Separate operating time recorder for each model.

• Slot time can be recorded by pressing the rotary control + ESC button, and then reset using the CLR button.

• Transmitter operating hours timer is automatically

reset to zero when the battery is recharged.

• Prepared as standard for use as Pupil or Teacher transmitter in a Trainer system.

Operational security and operating convenience

• SYNTHESIZER RF module with integral scanner function exploiting dual-conversion technology: checks frequency band for occupied channels.

• Selectable button pad lock prevents accidental and unwanted changes during ﬂ ight operations.

• Input lock using code number.

• Warning beep and pop-up on-screen message if

Trainer connection is incorrect.

• Variable warning threshold for battery voltage.

• Non-volatile memory for data back-up even when the transmitter battery is discharged or removed.

• Rotary control Enter function: the software always interprets a brief press on the rotary control as ENTER. In the Model Select and Function Select menus it is possible to select an item and call it up using the rotary control alone.

• Hotkeys for contrast adjustment, servo display (from virtually all menus), button pad lock and model select.

• The servo sequence at the receiver output can be changed in the software.

• Model icons: graphic display of the model type (ﬁ xed-wing / helicopter).

• Clearly arranged character table for simpliﬁ ed name input procedure.

mx-24s

Description of radio control system

mx-24s micro-computer radio control system

Transmitter alone, with PLL Synthesizer RF module and rechargeable transmitter battery installed, in aluminium case:

Order No. 4730.77 35/35B MHz band Order No. 4748.77 40/41* MHz-Band

* 41 MHz band only approved for use in France.

Speciﬁ cation – mx-24s transmitter

Transmission system Switchable: SPCM20, PCM20, PPM10,

PPM18, PPM 24, APCM24

Radio Frequency section

Synthesizer (10 kHz spacing), 35 / 35B, 40 / 41 MHz band

Spot frequencies 35-MHz band: chan. 61-80, 281*, 282*

35-MHz-B band: channels 182 ... 191 40-MHz band: chan. 50 ... 59, 81 ... 92

41-MHz band: channels 400 ... 420** Channel spacing 10 kHz Max. control func-

tions

SPCM20 = 10, PCM20 = 10, APCM24 =

12, PPM10 = 5, PPM18 = 9, PPM24 =12 Control functions Four proportional functions with digi-

tal trims, two proportional functions, two

switched functions, two INC / DEC but-

tons Channel pulse width 1,5 ms ± 0,5 ms Control resolution SPCM20/APCM24: 10 Bit (1024 steps),

PCM20: 9 Bit (512 steps) Aerial Telescopic aerial, ten sections, approx.

1150 mm long Operating voltage 9,6 ... 12 V Current drain approx. 85 mA (RF module removed)

150 mA (RF module switched off)

230 mA (RF module switched on)

250 mA (RF module and screen back-

light switched on) Dimensions approx. 200 x 195 x 98 mm Weight approx. 1100 g incl. transmitter battery

* Channels 281 and 282 not approved for use in Germany. ** 41 MHz band only approved for use in France.

* For charging the batteries you will also need the transmitter

charge lead, Order No. 3022.

** 12 V power source required.

Chargers and charge leads (optional accessories)

Order No. 6422 Minilader 2 Order No. 6427 Multilader 3 Order No. 6426 Multilader 6E*

Automatic battery chargers with special NiMH charge programs:

Order No. 6419 Ultramat 5*, ** Order No. 6409 Ultramat 6*, ** Order No. 6410 Ultramat 10*, Order No. 6412 Ultramat 12*, ** Order No. 6412.200 Ultramat 12* Order No. 6414 Ultramat 14*, Order No. 6417 Ultramat 25*, ** Order No. 6417.200 Ultramat 25* Order No. 6416 Ultra Duo Plus 30*, ** Order No. 6425 Twin Charger

Please refer to the main GRAUPNER FS catalogue for details of other battery chargers.

Recommended accessories

Order No. Description

70.25

Neckstrap (25 mm)

4178.1

Diagnosis lead

3290.22

Trainer / PC module

4182.9

PC interface lead

mc-22(s)/mx-22/mx-24s/PC

4185

USB PC interface

mc-22(s)/mx-22/mx-24s/PC

Replacement part

Order No. 3100.6 Telescopic transmitter aerial Please refer to the Appendix and the main GRAUP-

NER FS catalogue for a detailed description of all available accessories for the mx-24s radio control set.

Description of radio control system

Operating notes

Transmitter power supply

The

mx-24s transmitter is ﬁ tted as standard with a

9.6 Volt NiMH battery (8NH-2000TX) (speciﬁ cation may change). However, this battery is not charged as supplied. When you are using the transmitter you can monitor the battery voltage on the LCD screen. If the voltage of the transmitter battery falls below a certain point (see »General basic settings« menu

– page 154) you will hear an audible warning signal.

The screen then displays the following message to re-

mind you that the transmitter battery needs to be recharged:

If this happens, cease operations immediately; ideally the battery should be recharged before this level is reached.

Removing the transmitter battery

To remove the transmitter battery ﬁ rst remove the bat-

tery compartment cover on the rear face of the transmitter by sliding it in the direction of the arrow, then lift it off. Carefully disconnect the connector at the main circuit board – either pull gently on the cable or pull out the plug with a ﬁ ngernail, pulling on the lug on the top of the connector. Don’t pull the plug up or down when removing it; keep it parallel with the circuit board.

Operating notes

Batt must be re charged!!

Charging the transmitter battery

The rechargeable NiMH transmitter battery can be re-

charged via the charge socket ﬁ tted to the right-hand side of the case.

The transmitter must be switched off and left at “OFF”

for the whole period of the charge process. Never

switch the transmitter on when it is still connec-

ted to the charger; even a very brief interruption

in the charge process can cause the charge volta-

ge to rise to the point where the transmitter is im-

mediately damaged by the excess voltage. For this

reason check carefully that all connectors are secure and are making really good contact.

Polarity of the

mx-24s charge socket

Commercially available battery charge leads produced by other manufacturers are often made up with reversed polarity. For this reason use genuine GRAUPNER charge leads exclusively.

Caution: it is essential to connect the banana plugs

on the charge lead to the charger ﬁ rst, and only then

to connect the other end of the lead to the charge

socket on the transmitter; this avoids the danger of short-circuits. Never allow the bare ends of a connec-

ted charge lead to touch each other!

Charging the battery using a standard battery charger

The basic rule for charging the battery using a stan-

dard charger, i. e. one without automatic charge termination, is to start with a discharged pack and charge it for fourteen hours at a current corresponding to one tenth of the capacity printed on the label. In the case of the standard transmitter battery this means 200 mA. It is up to you to terminate the charge process at the correct time.

Charging the transmitter battery using an automatic charger

The transmitter is designed as standard for use with

automatic battery chargers to recharge the transmitter pack.

If you wish to use an automatic charger designed for NiCd batteries to recharge the NiMH pack which is ﬁ tted to the transmitter as standard, please carry out a series of test charges and check carefully that the charger terminates the process correctly. If your charger provides a facility for adjusting the Delta Peak termination voltage, you may well need to adjust this value.

Maximum charge current

Do not exceed the maximum permissible charge current of 1.0 A, otherwise there is a danger of causing damage to the transmitter.

Fuse: the transmitter is ﬁ tted with a 20 mm cartridge fuse (type: 3 Ampere, fast-blow). If the battery will not accept a charge, or the transmitter cannot be switched on, please check this fuse (see “Opening the transmitter” on page

14). Never by-pass (bridge) the fuse. Replacement fuses can be obtained from any electrical supplies shop. Ensure that the fuse is ﬁ rmly and correctly seated; you may need to bend the spring contacts slightly.

On-screen display of battery operating time

#01 0:00h SPCM20

10.9V

0:00h C62

0 0 0 0

Stop watch Flight tim

000 000

: :

This timer shows the cumulative operating time of the

transmitter since the last time the transmitter battery

Polarity of transmitter battery plug

brown or black

red

was charged.

This timer is automatically reset to “0:00” when the

transmitter battery voltage is signiﬁ cantly higher than the last time the unit was switched on, i. e. after a charge process. This is the state shown in the screenshot.

Receiver power supply

Various 4.8 V NiMH batteries are available for the re-

ceiver, varying in capacity. For reasons of safety you should not use dry cells in model aircraft, helicopters and other high-speed models. For the same reason do not use individual cells ﬁ tted in a battery holder; always use ready-made battery packs with welded or soldered connections.

There is no direct method of checking receiver battery

voltage when operating a model. Make it a routine to check the state of your batteries

at regular intervals. Charge your batteries in good time: don’t wait until you notice the servos running more slowly than usual before recharging the pack.

Please refer to the main GRAUPNER FS catalogue for full details of batteries, chargers, measuring equipment and monitoring units for use with rechargeable batteries.

Charging the receiver battery

The charge lead, Order No. 3021, can be connected

directly to the receiver battery for charging. If the battery is installed in a model and you have ﬁ tted one of the following switch harnesses: Order No. 3046, 3050, 3934 or 3934.3, then the battery can be charged via the separate charge socket or the charge socket which is built into the switch. The switch on the switch harness must be left at the “OFF” position for charging.

Operating notes

General notes on battery charging

• Always connect the charge lead to the charger ﬁ rst, and only then to the receiver or transmitter battery. This avoids the danger of accidental shortcircuit between the bare ends of the charge lead.

• Observe the recommendations provided by the charger manufacturer and the battery manufacturer at all times. Keep to the recommended maximum charge current stated by the battery manufacturer. To avoid damage to the transmitter, the charge current should never exceed 1.0 A; you can usually limit the charge current on the battery charger itself.

• Do not discharge the battery or carry out battery maintenance programs via the integral charge socket, as the socket is not suitable for this application.

• Never leave batteries on charge unsupervised.

Disposal of dry cells and rechargeable batteries

Never dispose of exhausted batteries in the house-

hold rubbish. As end-user you are legally obliged (“Battery Disposal Directive”) to return old and exhausted dry cells and rechargeable batteries to an approved disposal centre, e. g. your local toxic waste collection point or a retail outlet where batteries of the same type are sold.

Polarity of receiver

battery connector

Operating notes

Adjusting stick length

Both sticks are inﬁ nitely variable in length over a broad range, enabling you to set them to the correct length to suit your personal preference to provide ﬁ ne, accurate control of your models.

Loosen the retaining screw using a 2 mm allen key, then screw the stick top in or out to shorten or extend it. Carefully tighten the grubscrew again to lock the set length.

Opening the transmitter case

Please read the following notes carefully before you open the transmitter. If you are inexperienced in such matters we recommend that you ask your local GRAUPNER Service Centre to carry out these procedures for you.

The transmitter should only be opened in the following circumstances:

• In order to convert a non self-neutralising stick to self-neutralising, or vice versa; see page 16;

• In order to adjust the stick centring tension;

• In order to replace the internal fuse (3 A, fast-blow);

• In order to install a “Trainer” system and data transfer system; see page 15 and page 204 of the Appendix.

Before opening the transmitter it is essential to check that it is switched off (move the Power switch towards the screen). It is not necessary to remove the transmitter battery, but if you do not remove it take care never to switch the transmitter on while the case is open (“ON” position). Please see page 12 for information on removing the transmitter battery. The RF module can also be left in place.

Use a cross-point screwdriver (size PH1) to undo the six recessed screws at the indicated points in the rear face of the transmitter. Hold the two case shells together with your hand, turn the transmitter over and allow the six screws to fall out. The back cover can now be carefully removed.

Caution: A loom of cables connects a circuit board in the rear cover to the circuit board in the main case, which means that the transmitter back cover can only be folded down or to the side.

Important notes:

• Do not modify the transmitter circuit in any

way, as this invalidates your guarantee and also invalidates ofﬁ cial approval for the system.

• On no account touch the circuit boards with

any metallic object, and do not touch the contacts with your ﬁ ngers.

• Never switch the transmitter on when the case

is open.

When closing the transmitter please note the following points:

• Insert the two side-mounted proportional controls correctly in the cut-outs designed for them in the sides of the transmitter case;

• You will ﬁ nd two rubber pads ﬁ tted loose in the sides; ensure that they are located with the small slot facing the back cover, and engage them in the appropriate case cut-outs in the sides;

• Ensure that the wire loom connector between the back cover and the circuit board is ﬁ rmly inserted;

• Check that the V-shaped spring contacts (earth contacts) in the centre of the transmitter are not bent or deformed.

• Take care that no wires get caught when you close the back.

• Ensure that the two case shells line up exactly ﬂ ush before you ﬁ t the retaining screws. Never force the case shells together.

Please refer to the illustration on the next page when you carry out this procedure.

Padding

If the two pieces of padding fall out when you open the transmitter, re-ﬁ t them when closing the case, noting that the narrow slots face down in the case back, where they engage over a small lug.

Operating notes

Side-mounted proportional controls

When re-assembling the transmitter check carefully that the two side-mounted controls engage correctly in the cutouts designed for them in the top and bottom case shells. On no account force the case shells together. All the other switches are permanently installed.

Interface socket

14-pin socket for the optional Trainer / PC module, Order No. 3290.22, which is available as an accessory (see Appendix).

Earth contact spring

This spring completes the earth connection to the cir cuit board in the case back cover. Take great care not to bend or deform these contacts. If the ends of the spring appear to be dirty, clean them gently with a soft, dry cloth.

Cartridge fuse

(3A, fast-blow)

Transmitter installation bays

The Trainer / PC module available as an optional accessory (Order No. 3290.22) is installed in these two bays; see Appendix.

Directing the telescopic aerial

Before using the transmitter to control a model, screw the ten-section aerial ﬁ rmly into its socket and extend it to its full length. However, never

point the aerial directly towards the model, as signal strength is low in an imaginary line extending straight out from the aerial tip.

Aerial socket

Make sure that the aerial is ﬁ rmly screwed into the socket before using the transmitter.

Never switch the transmitter on when the

case is open.

C A U T I O N: on no account touch any soldered joint with a metal object: SHORT-CIRCUIT HAZARD. Such action invalidates your guarantee.

Padding (see top right)

Operating notes

3. Attach the ratchet spring: Attach the ratchet spring to one end of the plastic pillar, and set the desired spring force by screwing the M3 screw in or out at the brass stud.

4. If you wish to re-convert the stick to self-neutralising action, ﬁ rst remove the ratchet spring and slightly loosen the centring force adjustor screw: see right picture. Re-connect the neutralising lever, and slip a length of thin thread through the top loop of the spring (don’t tie a knot). Now use a pair of tweezers to connect the bottom loop of the spring to the adjustment system (see close-up picture below). Finally connect the top end of the spring to the neutralising lever using the thread. Once the spring is in the correct position, the thread can be withdrawn again.

The software also has to be “informed” of the change in stick mode; this can be carried out separately for

each model in the »Base setup model« menu (pages 64 / 66). To set the stick mode for the transmitter as a whole, i. e. so that it applies to all newly set-up model memories, use the »General basic settings« menu (page 154).

Stick centring force

The tension of the stick unit centring springs can be adjusted to suit your personal preference: the adjustment system is located adjacent to each centring spring.

Rotate the adjustment screw with a cross-point screwdriver to set your preferred spring force:

Turn to the right (clockwise) = spring force harder; Turn to the left (anti-clockwise) = spring force softer.

Brass stud Plastic pillar

Changing the mode of the dual-axis proportional stick units

Either stick can be converted from self-neutralising to non self-neutralising (ratchet) action. First open the transmitter as already described.

If you wish to switch the standard self-neutralising action to non self-neutralising, use this procedure:

1. Locate the brass stud supplied in the set, and screw it to the left or right stick unit as required using a 4 mm box spanner (see double arrow in the picture below).

2. Use a pair of tweezers to disconnect the spring from the neutralising arm of the appropriate stick unit, raise the lever and disconnect this too.

Neutralising lever

and spring

Operating notes

Plastic

pillar

Brass stud

Ratchet

spring

Operating notes

Changing the frequency band and spot frequency

The

mx-24s transmitter is ﬁ tted as standard with a

PLL-SYNTHESIZER RF module. The spot frequency (channel) is selected using the rotary control, i. e. plug-in crystals are no longer required at the transmitter.

The Synthesizer module also features an integral

dual-conversion frequency scanner which is used to check whether your preferred channel is already in use or not; it can also be employed to determine the vacant channels on your particular frequency band.

A detailed description of the method of using the Synthesizer module and selecting spot frequencies is found on pages 24 and 25 in the section entitled “Using the transmitter for the ﬁ rst time – frequency scanner and channel selection”.

The set spot frequency is displayed on-screen. A security system prevents the transmitter radiating an RF signal when initially switched on. The RF module must ﬁ rst be activated in the software, which provides an additional gain in safety.

At present two separate transmitters are available: for the 35 / 35B MHz band and the 40 / 41 MHz band:

Transmitters alone:

Order No. 4730.77 for the 35 / 35B* MHz band Order No. 4748.77 for the 40 / 41* MHz band

* Channels 281 and 282 on the 35 MHz band, and all channels

on the 41 MHz band, are not approved for use in Germany; see also the Frequency Table on page 206. The same table shows which channels are approved for use with the various types of model, i. e. model aircraft, model boats and RC cars.

The channels approved for use in individual countries are shown in the Frequency Table on page 206 (information not guaranteed).

The receiver must be operated on the same channel and the same frequency band as the transmitter.

It is possible to use this transmitter to control any GRAUPNER PLL Synthesizer receiver as well as ear-

lier crystal-controlled GRAUPNER receivers, provided that they are compatible with the transmitter modes PCM20, SPCM20, PPM18 or PPM24.

If you wish to use earlier crystal-controlled GRAUP-

NER receivers, it is essential to use genuine GRAUPNER FMsss plug-in crystals designed for the appro-

priate frequency band (see page 206). The receiver crystal is marked “R” (Receiver), and should be inserted ﬁ rmly into the opening in the receiver.

Important note: The RF Synthesizer module is connected to the

mx-

24s transmitter by means of two sockets. If the RF module is not plugged in correctly, the transmitter will switch directly to the basic display when switched on. The screen will then display the ﬂ ashing message “C––” instead of a channel number, indicating that the RF module is not ready for use.

#01 0:00h SPCM20

10.9V

0:05h C--

0 0 0 0

Stop watch Flight tim

000 000

: :

Changing the frequency band

If you wish to switch from the 35 / 35B MHz band to the 40 / 41 MHz band or vice versa, all you have to do is replace the SYNTHESIZER RF module in the transmitter:

Order No. 3853.35 for the 35 / 35B MHz band Order No. 3853.40 for the 40 / 41 MHz band

Operating notes

DSC socket

Direct Servo Control

Model name

#01 0:30h SPCM20 H-J.Sandbrunner

10.2V

0:30h

0000

Stop watch Flight tim

000 000

: :

DSC

3. Connect the other end of the connecting lead to the desired device, taking into account the operating instructions supplied with that equipment.

4. If you wish to use the Diagnosis lead, Order No.

4178.1, do not connect it directly to the receiver. First connect the lead to a receiver battery using a Y-lead (3936.11 or 3936.32), then connect this to the receiver’s battery input socket instead of the receiver battery. The end with the barrel plug can then be connected to the appropriate socket on the back of the transmitter.

Once the transmitter is connected to the recei-

ver as described above, you can check the control functions or make changes to settings even if another pilot is using “your” frequency. Since in this state (power = “OFF”) the transmitter does not broadcast a radio signal, you can, for example, prepare your model ready to ﬂ y without causing interference to other modellers. Another advantage is that the transmitter’s current drain is reduced, since the transmitter’s RF section is not active in this mode of operation. The use of Diagnosis mode therefore extends the operating time of the transmitter battery considerably.

Important: Ensure that all the cables are ﬁ rmly plugged in.

Note regarding ﬂ ight simulators: The range of ﬂ ight simulators available commercially is now very wide, and you may ﬁ nd that it is necessary to swap over the contacts at the barrel plug or the DSC module. This work must be carried out by a

The original function of this socket was for “Direct Servo Control”, and that’s why the abbreviation is still in use. However, it is now much more versatile than simply providing a means of controlling servos by cable. The two-pole DSC socket of the mx-24s is now also used as the Teacher or Pupil socket in a Trainer system (see page 150), and as an interface for ﬂ ight simulators.

For the DSC connection to work you must check the following:

1. Carry out any adjustments required in the appropriate menus:

If you are connecting the transmitter to a ﬂ ight si-

mulator, or if you are using the mx-24s transmitter as a Pupil transmitter in a Trainer system, then you must set the transmission mode to “PPM18” in the “Modulation” line of the »Base setup model« menu. However, if you wish to connect a Diagnosis lead (Order No. 4178.1), the “Modulation” must be selected to suit the receiver.

2. Always leave the transmitter’s On / Off switch in the “OFF” position in such cases, because otherwise the RF section of the transmitter module will not be switched off (no RF signal) even when the DSC lead is plugged in. This is particularly important if you are using a Diagnosis lead or a Trainer lead, because your transmitter may otherwise cause interference to other pilots. Only when the

mx-24s transmitter is in Teacher mode should the

transmitter be switched on before the Trainer lead is connected (see page 150).

Connect the appropriate two-pole lead to the

transmitter’s DSC socket. This action renders the transmitter and the LCD screen ready for use, circumventing the channel select process. At the same time the screen shows the message “DSC” instead of the usual display of the selected transmission channel.

GRAUPNER Service Centre.

Caution: Certain receivers – such as the R16SCAN – feature a battery socket to which a servo can also be connected via a Y-lead. It is not possible to use a DSC lead with this type of receiver.

For your notes

Description of transmitter

Transmitter aerial

(ten-section

telescopic)

Piezo buzzer

Proportional controls

Two proportional controls are mounted on the sides of the transmitter as standard. A centre detent ensures reproducible centre settings. In this case they are described in the corresponding menus as : right-hand control “CTRL 9”, left-hand control “CTRL 10”.

Operating buttons:

ENTER Input button ESC Back button CLEAR Erase button HELP Help button

LCD screen (see page 22 for more details)

The thin protective ﬁ lm over the screen surface can be peeled off using your ﬁ ngers if you wish. Contrast adjustment: from the basic display press the rotary control and rotate it at the same time; al-

ternatively press the rotary control and press the CONTROL 5 or 6 buttons, if these are not already in use for other purposes.

Warning indicators : If battery voltage falls below the set threshold • if there is a Trainer system malfunction • if Channel 1 is too close to full-throttle when the transmitter is switched on • if the Fail-Safe settings are not correct • power-on warning (checking a switch position).

ON / OFF switch

Note: Always switch the transmitter on ﬁ rst, followed by the receiver. After a ﬂ ight: switch the receiver off ﬁ rst, followed by the transmitter.

Rotary control, providing two-level control

Description of transmitter

Front panel

Switches between individual lines within a menu when held pressed in. When held pressed in turn the rotary control at the top end of the cylinder for a better grip.

A brief press on the top end of the rotary control changes the input ﬁ eld, or conﬁ rms your input. Pressing the HELP button with the rotary control held pressed in switches directly to the »Servo display« menu from the basic display and most menus.

If rotated in its normal (non-pressed) state, the rotary control selects your chosen item from the list in the multi-function menu. Once you have called up a menu point, the rotary control also changes the entered value in a highlighted ﬁ eld (light characters on dark background) which appears at the bottom edge of the screen. Any alterations you make take effect immediately. When not pressed in, turn the rotary control at the bottom end of the cylinder for a better grip.

Transmitter neckstrap lug

Digital trims

For ﬁ ne adjustment of servo (travel neutral) position. A brief push produces a single increment of offset (the increment size is variable in the “Stick mode” menu). The screen displays the trim positions.

Increment / Decrement buttons

Two proportional controls as standard: every time the button is pressed, the travel of the associated servo changes by 1% relative to the pre-set servo travel. INC = positive direction, DEC = negative direction. These controls are numbered as follows: right-hand button “CTRL 5”, left-hand button “CTRL 6”. These two buttons can be used as an alternative to the rotary control if they are not already in use for other purposes.

Stick units

Two dual-axis stick units providing four independent control functions. Variable-length sticks. The control functions (i. e. stick mode) can be assigned within the “Base setup model” menu, e. g. throttle left or right. The throttle stick can also be set to be self-neutralising or ratchet action: see page 16.

Switches

Eight external switches as standard (SW = switch), of which

two-position: SW 1, 2, 3, 4, 7, 8 (switch 8: self-neutralising) three-position: SW 5 + 6, 9 + 10. The three-position switches are

also used as transmitter controls to provide three-position servo travels. In this case they are described in the corresponding menus as : right-hand switch “CTRL 7”, left-hand switch “CTRL 8”.

Description of transmitter

Note: If you intend to work on the interior of the transmitter, remember not to switch the transmitter on. Disconnect the transmitter battery from the power socket. Take great care not to touch soldered joints with any metallic object.

Back panel

Opening the transmitter case

Undo the six recessed screws in the rear face of the transmitter using a cross-point screwdriver (size PH1). Be sure to read the section on page 16 before you proceed!

Synthesizer RF and Scan Module

The frequency band can be changed quickly and easily by carefully withdrawing the RF module using the two side-mounted lugs. Note: plug-in crystals are not necessary due to the PLL Synthesizer technology employed in the transmitter.

The channel is selected under software control immediately after you switch the transmitter on; see page

25. The new form of DUAL-CONVERSION scanning receiver is an integral part of the RF module. This enables you to check which channels in the vicinity of the transmitter are already in use; see page 24.

When you re-install the module, ensure that the contact pins are not bent.

Charge socket

Please read the notes on battery charging on pages 12 … 13.

Polarity:

Diagnosis socket (DSC*)

A special lead is available under Order No. 4178.1 which connects the mx-24s transmitter directly to a suitable receiver. If the transmitter is switched off, plugging the lead in automatically switches it on. At the same time the RF module remains disabled, with the result that no signal is transmitted via the aerial.

The DSC socket can also be used as a Teacher or Pupil socket in a Trainer system; for more details please refer to page 18 and the description of the »Tea-

cher / pupil« menu on page 150.

Teacher / PC module, Order No. 3290.22

An optional module is available which converts the

mx-24s transmitter into an opto-electronic Teacher

unit for use in a Trainer system. For Trainer mode operations you will also need to connect a light-pipe (optical cable) to the appropriate socket on the transmitter; this is available as an optional accessory. The second socket on the module is for data transfer between two

mx-24s transmitters, or between an mx-24s and a

PC. The accessories required for this are also listed in the Appendix.

Battery compartment

If you need to remove the battery, press on the two corrugated areas with both thumbs, then slide the battery compartment cover in the direction of the arrow.

* DSC = Direct Servo Control

SYNTHESIZER transmitter RF mo-

dules for the

-24s transmitter

Order No.

3853.35

35 MHz band

Order No.

3853.40

40/41 MHz band

Description of screen

ENTER (Input button):

Switches to multi-function list Calls up a menu

ESC (Escape button):

Returns step by step from any menu to the basic display

CLEAR (Erase button):

Resets altered values to default settings

HELP (Help button):

Calls up a brief help message relating to any menu

Model name (max. 10 characters)

Model memory 1 … 40

User’s name (max. 15 characters)

Model operating time

Superimposed warning messages*

Stopwatch in min:sec (count-up / count-down)

Flight time in min:sec (count-up / count-down)

Battery voltage, shown by a dynamic bar

display. If the battery voltage falls below a

particular (selectable) threshold (see page

155), a warning appears on the screen accompanied by an audible alert signal.

Transmit-

ter operating

time. This is

automatically

reset to zero

when the bat-

tery is rechar-

ged.

Display diagram for all four digital trim levers with numerical and direction indicators: “

”

or “”. Special cut-off trim for C1 (see page 34). For each trim lever separately the “shadow” indicates whether the trim operates glo-

bally (= shadow) or separately for each ﬂ ight phase (this parameter is set in the »Stick mode« menu, see pages 76 / 77). Exception: the C1 trim always operates globally.

The rotary control can be operated on two levels. At the basic transmitter display it is used to adjust screen contrast when held pressed in, or:

Press the rotary control and adjust screen contrast using CTRL 5 or 6 – unless these buttons are already assigned to another function.

GRAUPNER logo, alternatively the ﬂ ight phase name. Different ﬂ ight phases are selected by operating user-assigned switches.

Description of screen

Batt must be re charged!!

Charge battery*

Current channel number.

The num-

ber ﬂ as-

hes if the RF module is switched

off.

(Note: an additional timer can also be activated.)

Model type Fixed-wing or Helicopter

Notes: * If the transmitter battery voltage is too low, the message “Currently not possible,

battery voltage too low” appears in the »Model select« and »Copy / Erase« menus.

** For safety reasons this warning can only be disabled for non-powered ﬁ xed-wing

models: in this case select the »Model type« menu (see page 70) and enter “none” in the “Motor” line.

Unlock by rotary and CLR

Button pad lock

Button pad lock Hold rotary control pressed in + CLEAR button.

Thr too high!

Throttle stick too

advanced**

No pupil signal

Problem with Trainer mode

Fail Safe setup t.b.d.

Only in PCM20,

SPCM20 and

APCM24 modes

!Warning!

Power-on war-

ning for selectab-

le switch

Using the transmitter for the ﬁ rst time

Preliminary notes, selecting the language

Preliminary notes

When your

mx-24s transmitter is delivered it is set

by default to SPCM20 mode, which suits receivers of the “smc” type.

In addition to SPCM-20 mode the following alternative modes are also available:

• PCM20 mode for all GRAUPNER/JR “mc” and “DS mc” type receivers.

• PPM18 mode for all GRAUPNER/JR “FM-PPM” type receivers.

• PPM24 mode for the GRAUPNER/JR DS 24 FM S receiver.

• PPM10 mode for GRAUPNER/JR FM receivers with up to five servo outputs, e. g. SR6SYN or XP10FM.

• APCM20 mode for all GRAUPNER/JR “amc” type receivers.

The ability to switch transmission modes means that the mx-24s transmitter can operate all GRAUPNER receiving systems supplied to date, i. e. all receivers supplied with PPM-FM and PCM transmitters (with the exception of the FM6014 / PCM18).

If you do not intend using a receiver of the “smc” type with the transmitter, the ﬁ rst step is therefore to set the type of modulation to suit your receiver. If you select an incompatible mode, the receiver will not respond to the transmitter.

The transmission mode can be set in the “Modulation” line of the »Base setup model« menu, and the as signment of the four stick functions in the “Stick mode” line (see pages 64 and 66) for the current model memory, or in the »General basic settings« menu (description: page 154) for all future model memories.

Which crystals can be used?

The mx-24s requires no plug-in crystals. The transmission channel is selected by software: see the following page.

Is the battery charged?

When you take receipt of your mx-24s transmitter, the battery will be in the discharged state, so you must ﬁ rst charge it as described on pages 12 … 13. If you do not do this, the battery will soon fall below the pre-set threshold voltage, and you will see and hear a warning signal to remind you to recharge it. The low voltage threshold can be set to any value in the range 9.3 to 11.0 V in the “Battery Warning Threshold” line of the »General basic settings« menu. The default setting is 9.3 V.

Aerial ﬁ tted? Never switch the transmitter on unless the aeri-

al is screwed in. Even for prolonged testing you should always ﬁ t the aerial and extend it fully,

otherwise the transmitter may malfunction, with possible damage to the RF module.

When you wish to control a model it is fundamentally essential to screw the ten-section telescopic aerial into the transmitter and extend it fully.

Transmitter ﬁ eld strength is at a minimum in an imaginary line extending straight out from the tip of the transmitter aerial. It is therefore fundamentally misguided to “point” the transmitter aerial at the model with the intention of obtaining good reception.

Selecting the language

The

mx-24s allows you to select any of the following

four languages:

• German

• English

• French

• Italian

The language is selected by holding the HELP button pressed in while you switch the transmitter on; the following display appears:

GB F I

The rotary control can now be used to select the desired language. Conﬁ rm your choice with a brief press on the rotary control, or by pressing the ENTER button.

All settings are retained in full if you switch to a different language.

Batt must be re charged!!

Using the system for the ﬁ rst time

Frequency Scanner and Channel Select

Frequency scanner

The SYNTHESIZER RF module is equipped with a dual-conversion frequency scanner. This module enables the user to scan the vicinity for occupied channels on the frequency band of your RF module before it is activated.

Before you switch the transmitter on, please check that the SYNTHESIZER module is ﬁ rmly seated in the back of the transmitter. If this is not the case, the transmitter will switch directly to the basic display when switched on, and the screen will show the ﬂ ashing display “C– –” instead of a channel number.

Model name

#01 0:30h SPCM20 H-J.Sandbrunner

10.9V

0:10h C

0 0 0 0

Stop watch Flight tim

000 000

: :

For safety reasons, every time you switch the transmitter on you must ﬁ rst conﬁ rm to the integral Synthesizer module that you wish to use the set frequency. This conﬁ rmation takes the form of a security query, intended to prevent you switching the system on accidentally when it is set to the wrong channel. The software displays the message: “RF off / on”. The last set channel is initially highlighted (highlighted = black background) and ﬂ ashes:

C61

RF off

SCAN

---

switch on

YES

Channel

The integral scanner immediately searches all channels on the current frequency band, regardless of the set channel. If another transmitter is already active on the pre-set channel – in this case “61” – a mes-

sage appears on the screen to alert you, and at the same time the internal piezo sounder emits a warning sound. The current signal strength is indicated by an on-screen bar diagram:

C61

RF off

NO SCAN

IN USE !!

Channelswitch on

YES

In the centre – above the “ ” symbol – the signal strength of the currently set channel is displayed, to right and left of it the signals present on the two adjacent channels.

(In our example channel 61 is the lowest channel in the 35 MHz band, so no signal bar is displayed to the left of it.)

In our example it is clear that channel 61 is already in use. This means that you must search for another unoccupied channel before activating the RF module. This is accomplished by switching to the SCAN screen page using the rotary control:

---------------------- ----------

61 65 70 75 80 182 186 191

On this screen you will see a list of all the channels which are accessible using the RF module currently installed in the transmitter. The scanner automatically and repeatedly searches the frequency band for further signals.

In this example we can see that channel “190” is also in use in addition to channel “61”. The signiﬁ cantly weaker signals – in this case on channels 62, 65, 189 and 191 – may be due to a variety of sources, such

as weak signals from very distant radio control systems, or crosstalk effects from radio control systems in the immediate vicinity. If you think this might be the case, walk a few metres away from the other radio control transmitters, and observe whether the signal strength diminishes rapidly with increasing distance. Under certain circumstances, especially when other transmitters are very close by, what seem to be “unaccountable signals” may be displayed on other channels.

Important notes:

• Please note that it is possible to switch the RF module on even if the message “IN USE !!” appears on the screen. However, if you do switch on, then you will endanger your own model as well as the models of other pilots due to a channel clash (two transmitters on the same frequency).

• The range of the mx-24s scanner is limited, which means that it may not always detect the signals from relatively distant radio control transmitters. You should therefore not rely on the scanner picking up signals from other model pilots if they are standing some way off; this applies in particular if the terrain is uneven and line-of-sight contact is limited.

• The indicated signal strength of other radio control system transmitters depends to a considerable extent on the conditions prevailing at the model ﬂ ying site, and also on the transmitted power and aerial length of other transmitters, the distance between the mx-24s and other transmitters, and the direction of the mx24s aerial relative to other transmitter aerials. The sensitivity of the integral scanner also varies according to the extent to which the mx-24s transmitter aerial is extended.

• At present channel 80 is followed by channels 281 and 282, which are not approved for use in

Using the system for the ﬁ rst time

Germany; see the channel select list in the next column.

Selecting the channel

Select a vacant spot frequency, e.g. (in this case) channel 65, after establishing that the low-level signal indicated on the display is only due to crosstalk effects from a transmitter in the vicinity. Press the ESC button to return to the previous screen display, and switch to Channel Select “” using the rotary control:

C61

RF off

NO SCAN

IN USE !!

Channel

YES

switch on

Press the rotary control or ENTER, then select the desired channel – in this case 65 – from the list using the rotary control:

C61 C65 C66

C67 C73 C79 C184 C190

C62 C63 C64

C68 C69 C70 C71 C72 C74 C75 C76 C77 C78 C80 C281 C282 C182 C183 C185 C186 C187 C188 C189 C191

Press the ENTER button or the rotary control to terminate the channel select process.

If you now wish to activate the RF module with this channel, use the rotary control to move to “YES” and press ENTER (or press the rotary control brieﬂ y); this action switches on the RF module on the new channel:

C65

RF off

YES SCAN

Channelswitch on

The screen immediately switches to the basic display, which now shows the number of the active channel in highlighted form:

Model name

#01 0:30h SPCM20 H-J.Sandbrunner

10.9V

0:10h C65

0 0 0 0

Stop watch Flight tim

000 000

: :

The transmitter is now ready for use. The following channels are available:

Frequency band Channels*

35/35B MHz band 61 … 80 / 281, 282

also 182 … 191

40/41 MHz band 50… 92 / 400 … 420

* Channels 281 and 282 in the 35 MHz band, and all channels in

the 41 MHz band, are not approved for use in Germany. Please refer to the frequency table on page 206, which lists the channels valid in the European continent at time of going to press (information not guaranteed).

You must now switch the transmitter off, then on again, in order actually to switch to another channel.

The basic procedure for the initial programming of a new model memory is described on page 58, and in the section starting on page 158 in the programming examples.

W A R N I N G: NEVER, UNDER ANY CIRCUMSTANCES, SWITCH THE TRANSMITTER OFF WHEN YOU ARE FLYING A MODEL AIRCRAFT! IF YOU DO, YOU RUN A SERIOUS RISK OF LOSING THE MODEL, AS YOU WILL BE HIGHLY UNLIKELY TO BE ABLE TO REACTIVATE THE RF SIGNAL QUICKLY ENOUGH WHEN YOU SWITCH ON AGAIN, SINCE THE TRANSMITTER ALWAYS RESPONDS WITH THE SECURITY QUERY “RF SIGNAL ON YES / NO” WHEN SWITCHED ON.

Batt.

Servos

2345678 9

Installation notes

Note: If you wish to use a receiver battery and a speed controller with integral BEC* system simultaneously, it is usually necessary to disconnect the positive (red) wire from the 3-pin plug. This varies from controller to controller, so please read the instructions supplied with the unit.

Use a small screwdriver carefully to raise the centre lug of the plug (1), withdraw the red wire (2) and wrap the exposed contact with insulating tape to prevent possible short-circuits (3).

*Battery Elimination Circuit

Please read the installation notes relating to the receiver, the receiver aerial, and the servos on the following page.

If the receiver is of the type requiring an interchangeable plug-in crystal, the channel number of the receiver must be identical to the channel number set on the transmitter. In this case it is only permissible to use the plug-in crystals marked “R” (for Receiver) as shown in the table on page 206. No receiver crystal is required if you are using a GRAUPNER PLL Synthesizer receiver. According to the receiver type, the desired channel number is set either directly on the receiver using the channel selector, or by means of a frequency scan; see the instructions supplied with the receiver.

GRAUPNER receivers are ﬁ tted with polarised sockets, so that the servos and power supply cannot be connected the wrong way round; you will ﬁ nd that the plugs are slightly chamfered on one edge to match the sockets. Connect the battery to an ON / OFF switch harness (see the main GRAUPNER FS catalogue), and connect the switch to the socket on the receiver marked “Batt”.

If you use the DS 24 FM S or amc24DSCAN receiver you can control up to twelve servos, speed controllers etc. directly. Servos 1 to 12 can be controlled using the two dual-axis sticks and – after appropriate programming – any other (proportional) controls or switches present on the

mx-24s transmitter. The two

latter types of controls can be assigned to inputs 5 … 12 in the software; see the »Transmitter control ad- just« menu, pages 78 / 80. However, all servos can also be accessed via mixer functions; see the »Free mixers« menu on page 135.

red

Receiving system

(not included in the set)

Receiver

battery

receiver

Aerial

Switch harness

Installation notes

Your receiving system must be installed correctly in the model. The following are a few suggestions when using GRAUPNER equipment:

1. Wrap the receiver in (anti-static) foam rubber at least 6 mm thick. Fix the foam round the receiver using rubber bands to protect it from vibration, hard landings and crash damage.

2. The receiver aerial must be secured in the model, so that there is no chance of it becoming tangled in the propeller or control surfaces. However, never deploy the aerial in an exactly straight line, but angle it: e. g. run it straight to the tailplane, then leave the ﬁ nal 10 - 15 cm trailing freely, as this avoids reception “blind spots” when the model is in the air. If this is not possible, we recommend that you lay out part of the aerial wire in an S-shape inside the model, as close to the receiver as possible.

3. All switches must be installed in a position where they will not be affected by exhaust gases or vibration. The switch toggle must be free to move over its full range of travel.

4. Always install servos using the vibration-damping grommets and tubular metal spacers supplied. The rubber grommets provide some degree of protection from mechanical shocks and severe vibration. The drawing on the right shows the correct method of mounting a servo. The metal spacers are ﬁ tted into the rubber grommets from underneath. Don’t over-tighten the servo retaining screws, as this will compress the grommets and thereby reduce the vibration protection they afford. The system offers good security and effective vibration protection for your servos, but only if the servo retaining screws are ﬁ tted and tightened properly.

5. The servo output arms must be free to move over their full arc of travel; ensure that no part of the

Servo mounting lug

Retaining screw

Rubber grommet

Brass tubular spacer

mechanical linkage can obstruct the servo in its movement. It is also mandatory to ensure that the servo is not stalled mechanically at any point in its travel. If this is the case, re-connect the mechanical linkage to reduce the linear travel, or reduce the servo travel at the transmitter. This is carried out in the option “Travel reduction” in the »Servo adjustment« menu.

The sequence in which the servos are connected to the receiver is dictated by the model type. Please see the socket assignments listed on pages 37 and 43.

Be sure to read the safety notes on pages 4 … 6.

Servo mounting

If the receiver is ever switched on when the transmitter is off, the servos may carry out uncontrolled movements. You can avoid this by keeping to the following order when switching the system on:

Always switch the transmitter on ﬁ rst,

followed by the receiver.

And when switching the system off:

Always switch the receiver off ﬁ rst,

followed by the transmitter.

When programming the transmitter you must always ensure that any electric motors in the system cannot possibly burst into life accidentally, and that an I. C. engine ﬁ tted with an automatic starter cannot start unintentionally. In the interests of safety it is always best to disconnect the ﬂ ight battery, or cut off the fuel supply, before carrying out any programming work.

Range checking

Before every session you should always check that each working system is functioning correctly, and carry out a range check with the model on the ground. The transmitter aerial should be ﬁ tted but collapsed completely. Carry the aerial a suitable distance from the model, operating the controls all the time: each function should work smoothly and correctly during this test. If your model is powered, repeat the check with the motor running to ensure that it does not cause interference.

Deﬁ nition of terms

Control functions, transmitter controls, function inputs, control channels, mixers, switches, control switches, ﬁ xed switches

Deﬁ nition of terms

To make it easier for you to understand the mx-24s manual, we present at this stage two pages of deﬁ nitions of terms which crop up again and again in the remainder of the text, together with a basic ﬂ ow chart of the course of the signal from the transmitter control to the point where it is broadcast from the transmitter aerial.

Control function

The term “control function” can be thought of as the signal which is generated in order to control a particular function – initially independent of the course of the signal in the transmitter. In the case of ﬁ xedwing model aircraft, throttle, rudder and aileron represent control functions, whereas collective pitch, rollaxis and pitch-axis are typical of those used to control model helicopters. The signal of a control function may be assigned directly to a control channel, or to several control channels via mixers. A typical example of the latter is a pair of separate aileron servos, or two roll-axis or pitch-axis servos in a model helicopter. In particular, the control function includes the inﬂ uence of the travel of the mechanical transmitter control on the corresponding servo. This can be expanded or compressed by means of software; it is also possible to modify the characteristics of the travel from linear at one end of the scale to extreme exponential at the other.

Transmitter control (CTRL)

The term “transmitter control” refers to the mechanical elements on the transmitter which are operated directly by the pilot. Their movements in turn produce corresponding movements in the servos, speed controllers etc. at the receiver end. Transmitter controls include the following:

• The two dual-axis stick units for the control func- tions 1 to 4; these four functions can be interchanged in any way you like through software, e. g. throttle left or right, without having to re-connect the servos. The dual-axis stick function for throttle or airbrake control is often known as the C1

(Channel 1) control.

• The two proportional controls located on the sides of the case, which are always referred to as controls number 9 (right-hand “rotary slider”) and 10 (left-hand “rotary slider”) at various points in the program.

• The two transmitter controls termed CONTROL 5 and 6. On the

mx-24s these have a

dual function: a) If these two transmitter controls are not assi-

gned to any of the inputs in the »Control ad- just« menu (see pages 78 and 80), they can be used as INCrement / DECrement buttons for adjusting values in the “+” (INC) and “-” (DEC) directions, as an alternative to the ROTARY control.

b) If they are assigned as transmitter controls in

the »Control adjust« menu, they change the position of the associated servo by a 1% increment (relative to the currently set servo travel – see the »Servo adjustment« menu) every time they are pressed. The positions are superimposed on the basic screen display immediately the buttons are pressed, or when you press the rotary control. This is ideal, for example, for setting the camber-changing ﬂ aps to different positions in individual ﬂ ight phases. If they are held pressed in for a longer time, the rate of change alters automatically – made audible by a faster sequence of beeps. You will also hear an audible signal when the buttons reach the centre position.

Note: The position of these two transmitter controls is always stored separately for each ﬂ ight phase, provided that they have been assigned to

one of the inputs 5 … 12 in the »Control ad- just« menu.

• However, the servos can also be switched between three different ﬁ xed positions (forward - centre - back) by means of the three-position switches termed CONTROL 7 and 8. They can also be switched between two positions (forward - back) using any of the remaining switches (SW = abbreviation for switch), e. g. from the one servo end-point to the other. The individual positions which a servo takes up at each switch position can be set individually (see the »Control adjust« menu, pages 78 and 80, and the »Servo adjustment« menu, page 74).

The transmitter control or switch which operates each one of the servos 5 … max. 12 is freely programmable, without restriction.

Important note: In the default state of the transmitter software all these inputs are set to “free”, i. e. they are not assigned to any functions as standard.

The numbers printed on the transmitter are intended exclusively to help you keep track of the programming procedure. Only in the Helicopter menu is the right-hand side-mounted proportional control (CONTROL 9) already assigned to the “Throttle limit function”; see page 82. In the Helicopter menu, inputs 6, 7 and 12 are also assigned to “Throttle”, “Gyro” and “Throttle limit” respectively, since helicopter-speciﬁ c functions are controlled using these inputs.

Physically and terminologically each transmitter control terminates where it reaches the …

Function input

This is an imaginary point in the signal path, and must not be considered the same as the point on the circuit board where the transmitter control is connected. In fact, the line “Stick mode” of the menu »Model type« and the menu »Control adjust« inﬂ uence the sequence “down-stream” of these connections, i. e. it

CM20

C65

0 0

Stop Flight

ame

D/R EXPO

is possible – and indeed likely – that there will be differences between the number of the transmitter control and the number of the subsequent control channel.

Control channel

There is a point in the signal path where the signal contains all the information required to control a particular servo. Whether it emanates directly from a transmitter control or indirectly via a mixer, we now describe this as a control channel. This signal is generated individually for each servo, and then leaves the transmitter via the RF module in order to control the corresponding servo in the model.

Mixers

The signal ﬂ ow chart includes a wide range of mixer functions. Their purpose is to enable a control function to branch at the mixer input, so that it can affect multiple servos. The mixer programs provided by the software are extremely wide-ranging and versatile. Please refer to the section of this manual starting on page 110, which describes the numerous mixer functions in full detail.

Switches (SW)

Earlier we saw that the two-position and three-position switches provided by the

mx-24s are able to

move their associated servos to two or three pre-deﬁ ned positions. However, all these switches are also designed to be used for switching program options, e. g. for starting and stopping timers, switching mixers on and off, toggling Trainer mode etc.. For this reason the two three-position switches are also described as “SW 5 + 6” and “SW 9 + 10”. The switch SW 8 – top right, rear – is a self-neutralising unit.

Each switch can be assigned as many functions as you wish. The linking of several switches in “AND” or “OR” combinations (see the »Logical switches« menu on page 97) enables them to be used in very complex superimposed arrangements. Numerous examples are described later in this manual.

Deﬁ nition of terms

Control function

Control channel

Aerial

Servo adjustment: reverse - centre - travel - limit

mx-24s-Programme

For example:

Model type

Helicopter type

Control switches

Logical switches

Phase settings

Phase assignment

Non-delayed channels

Wing mixers

Helicopter mixers

Free mixers

MIX active in phase

MIX only channel

Dual mixers

2-position switch

3-position switch

For switching mixers, auto-

rotation, ﬂ ight phases etc.

Function input

Channel 1

curve

Dual-axis stick unit

Transmitter control

(digital button) 5

Transmitter control

(digital button) 6

Transmitter control 7

(3-position switch)

Transmitter control 8

(3-position switch)

Transmitter control 9

(right-hand side-mounted

rotary control)

Free assignment of

transmitter controls 1, 5 … 10 and of all switches (SW) by software

Stick mode 1 … 4Unrestricted transmitter control assignment, inputs 5 … 12

Transmitter control settings: offset - control travel - time

Transmitter controls

By default transmitter controls

5 …12 are de-coupled in the

software – (exception:

Throttle limiter control)

Transmitter control inputs 1 …

4 can be interchanged in the

»Base setup model« menu.

Transmitter controls 1 and 5

… 10 can be assigned to in-

puts 5 … 12 in any order in

the »Control adjust« menu.

Mixer input

Mixer output

Transmitter control 10

(left-hand side-mounted

rotary control)

Signal ﬂ ow chart

Transmitter buttons and rotary control

Transmitter control switches

Sometimes it is desirable to switch a function on or off at a particular position of another transmitter control, e. g. at a deﬁ ned position of one of the dual-axis sticks. Typical examples are switching a stopwatch on and off, extending spoilers automatically, and many others.

The

mx-24s software includes a total of eight soft-

ware “switches” of this type, termed “G1 … G8”. All you have to do is deﬁ ne the switching point on the travel of the transmitter control; this just requires pushing a button. The direction of switching can be determined in the software by operating the associated transmitter control at the stage when the control switch is assigned.

In the »Control switches« menu, pages 78 and 80, you will ﬁ nd that two frequently needed control switches are already pre-programmed: both of them on the throttle stick (“Control 1”) with a switching point at

-75% (G1) and +75% travel (G2). Naturally, transmitter control switches can also be

combined in order to solve more complex problems; they can also be used in conjunction with the physical switches which have already been described.

A series of instructive examples makes it child’s play to program these functions: please refer to the programming examples starting on pages 94, 170, ...

Fixed switches FXI and FX

This type of switch turns a function on permanently – e. g. a timer (closed ﬁ xed switch) or off permanently (open ﬁ xed switch). These two ﬁ xed switches are part of a range of “expanded switches”, to which the logical switches also belong. They can be programmed in any of the menus in which the following window is superimposed when an assignment is made (see page 32 for more details):

Move desired switch to ON position

(ext. switch: ENTER)

Operating buttons

The transmitter is programmed using just four buttons situated to the left of the screen, in conjunction with the crucial element: the “3-D rotary control” to the right of the screen, the functions of which are described on the following page.

Operating buttons:

• ENTER

The ﬁ rst time you press the ENTER button you

move from the basic screen display to the multifunction menus. You also press ENTER to call up a selected menu.

• ESC = ESCAPE Pressing the ESC button takes you one step back

at the function select stage, and continues to return you through the system until you reach the basic display.

• CLR = CLEAR At the programming stage, pressing CLEAR re-

sets an altered parameter to the default value.

CLEAR is also used to leaf backwards through the

pages within the Help system.

• HLP = HELP At any point in the programming process you can

press this button to call up a brief Help text which informs you how to use the individual menu in which you are currently located. Within the Help text you can leaf forwards through the screen pages by pressing the HELP button again, and leaf through backwards using the CLEAR button.

Basic operations

Button pad, hotkeys for fast acccess, functions of the rotary control

ENTER, ESC, CLEAR, HELP, contrast adjustment, button pad lock

Hotkeys, functions of the rotary control

The basic method of using the rotary control has already been described on page 20. Here we show an example of using the rotary control in a practical application.

First switch the transmitter on (the method of selecting a channel and using the scanner have already been described in the section starting on page 24). Now just press the ENTER button, so that the RF module remains switched off. You are now at the basic screen display.

Note: If the two digital buttons CONTROL 5 and / or 6 have not already been assigned to other purposes, e. g. in the case of a brand-new transmitter or a newly initialised model memory, these buttons have exactly the same effect as turning the rotary control.

• Adjusting screen contrast

Model name

#01 0:00h SPCM20 H-J.Sandbrunner

10.9V

0:05h C65

0 0 0 0

Stop watch Flight tim

000 000

: :

Press and

rotate

You can adjust the screen display to suit the ambient conditions by pressing and turning the rotary control.

• Switching the button pad lock on and off

Model name

#01 0:05h SPCM20 H-J.Sandbrunner

10.9V

0:30h C65

0 0 0 0

Stop watch Flight tim

000 000

: :

CLEAR

A key symbol to the left of the GRAUPNER/JR logo indicates that the button pad is locked. You can unlock or lock the button pad by pressing the

CLEAR button whilst holding the rotary control

pressed in.

+ 186 hidden pages

GRAUPNER mx-24s Programming Manual

Specifications and Main Features

Frequently Asked Questions

User Manual