ROBBE-Futaba FX-18 NiMH User manual

FM 35 MHz NC No.F 4090
FM 40 MHz NC No.F 4091
FM 41 MHz NC No.F 4092
FM 35 MHz NiMH No.F 4095
FM 40 MHz NiMH No.F 4096
FM 41 MHz NiMH No.F 4097
II
IINN NNSS SSTT TTRR RRUU UUCC CCTT TTII IIOO OONN NN MM MMAA AANN NNUU UUAA AALL LL
NN
NNOO OOTT TTII IICC CCEE EE DD DD’’ ’’UU UUTT TTII IILL LLII IISS SSAA AATT TTII IIOO OONN NN
Illustration shows expandedversionof thetransmitter,
fittedwith optionalaccessories.
L’illustration présente l’émetteur pourvu d’extensions et équipé de divers
accessoires.

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
Contents
Section Page
Safety requirements....................................................3
1. Set contents..................................................................4
2. General description ....................................................4
2.1 FX-18 transmitter ..........................................................................4
2.2 R147F receiver................................................................................5
2.3 S 3001 servo....................................................................................5
3. Specification ................................................................5
3.1 FX-18 transmitter ..........................................................................5
3.2 R147F receiver................................................................................5
3.3 S 3001 servo....................................................................................5
4. FX-18 transmitter ........................................................6
4.1 External transmitter features....................................................6
4.2 Removing the back panel..........................................................6
4.3 Stick adjustments..........................................................................6
- Length adjustment
- Spring tension
-Throttle ratchet function
4.4 CAMPac memory modules........................................................7
4.5 Changing crystals..........................................................................7
4.6 Changing the transmitter battery ..........................................8
4.7 Installing and connecting option modules ........................8
4.8 Voltage display ............................................................................10
4.9 Low-voltage alarm......................................................................10
4.10 Charging the batteries..............................................................10
4.11 Trainer mode................................................................................11
4.12 DSC mode / use with flight simulator ................................12
4.13 Data transfer to a PC..................................................................12
5. Connecting the servos ..............................................12
6. Using the transmitter for the first time ..................12
6.1 Screen and keypad ....................................................................12
6.2 Selecting a Home menu ..........................................................12
6.3 FX-18 menu structure (flow chart) ......................................13
7. Base settings (BASC)..................................................14
Menu structure of base functions ........................................14
7.1 Parameter menu (PARA) ..........................................................15
7.1.1 Modulation setting (MODU) ..................................................15
7.1.2 Stick mode (STCK) ......................................................................15
7.1.3 Throttle reverse (TREV) ............................................................16
7.1.4 Asymmetric throttle trim (ATL)..............................................16
7.1.5 Dual Rate switches (DRSW) ....................................................16
7.1.6 Audible sounder (BEEP)............................................................16
7.1.7 Language select (ENG)..............................................................16
7.1.8 Low voltage alarm (VOLT) ......................................................17
7.1.9 Multi-Switch-Prop function (MULT) ....................................17
7.1.10Model memory reset (REST) ..................................................17
7.2 Model memory select (MODL) ..............................................17
- Model memory copy (COPY) ..............................................18
- Entering the model name ....................................................18
7.3 Select model type (TYPE) ........................................................18
7.4 Servo reverse (REVR)..................................................................18
7.5 Servo centre offset (STRM)......................................................19
7.6 Servo travel (ATV) ......................................................................19
7.7 Transmitter control travel (AFR) ............................................19
7.8 Dual Rates (D/R) ..........................................................................20
7.9 Exponential function (EXP)......................................................20
7.10 Linking mixers (VMX1-3)..........................................................21
7.11 Dual mixers (XMIX) ....................................................................23
Section Page
7.12 Digital trims (TRIM)....................................................................23
7.12.1Trim parameters (TRIM)............................................................24
7.12.2Trim travel (RATE)........................................................................24
7.12.3Trim increment (STEP) ..............................................................24
7.13 Motor cut (TCUT)........................................................................24
7.14 Stopwatch (ST-W) ................................................................24,25
7.15 External mix trimmers (VOLM) ..............................................25
7.16 Fail-Safe settings (F/S) ..............................................................26
8. Powered model aircraft (ACRO)................................27
8.1 Power program menu structure............................................27
8.2 Switch and mix trimmer assignment (ACRO) ..................27
8.3 Combi-switch (AI-R) ..................................................................27
8.4 Flaperon mixer (WING) ............................................................28
8.5 Delta mixer (ELVN)......................................................................30
8.6 Flap -> elevator mixer (FL>E)..................................................30
8.7 V-tail mixer (VTAL)......................................................................31
8.8 Snap-roll function (SNAP)........................................................32
8.9 Landing pre-sets (LAND)..........................................................32
9. Gliders (GLID) ............................................................33
9.1 Glider program menu structure............................................33
9.2 Socket assignment in GLID menu........................................33
9.3 Switch and mix trimmer assignment (GLID) ....................34
9.4 Combi-mixer (AI>R)....................................................................34
9.5 Flaperon mixer (WING) ............................................................34
9.6 Aileron -> flap mixer (AI-F)......................................................36
9.7 Flap -> elevator mixer (FL>E)..................................................37
9.8 Butterfly mixer (BUTT) ..............................................................37
9.9 Butterfly -> elevator mixer (BU-E) ........................................38
9.10 V-tail mixer (VTAL)......................................................................38
9.11 Trim program 1 and 2 (TRM1/TRM2) ..................................39
10. Model helicopters (HELI) ..........................................40
10.1 Helicopter program menu structure ..................................40
10.2 Switch and mix trimmer assignment (HELI)......................40
10.3 Swashplate setting (SWSH) ....................................................41
10.4 Revolution mixer (REVO)..........................................................42
10.5 Idle-up,normal (NORM)............................................................42
10.6 Idle-up 1 (IDL-1) ..........................................................................43
10.7 Idle-up 2 (IDL-2) ..........................................................................43
10.8 Auto-rotation (T-HO) ................................................................44
10.9 Gyro gain (GYRO)........................................................................45
11. Installing channel expansion modules (MULT) ......46
11.1 Installing and connecting Multi-modules ........................46
11.2 FX Multi-Switch-Prop module................................................46
11.3 FX Multi-Switch module lighting set ..................................48
11.4 FX Multi-Switch module sound ............................................48
12. Connecting the receiving system,tips ....................49
- Connecting the receiver........................................................49
- Receiver aerial............................................................................49
- Switch harness ..........................................................................49
- Servo leads / servo suppression filters ............................49
- Servo installation / servo travels / output arms ....49,50
- Installing mechanical linkages............................................50
13. Using the system........................................................50
14. Guarantee ..................................................................51
15. Service Centre addresses ..........................................51
16. Post Office regulations..............................................51
17. Accessories............................................................52-55
2

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
Safety notes:please observe at all times.
Besure toreadright throughtheseinstructionsbefore youuse
the system for the first time. This applies in particular to the
safety notes.If you are new to radio-controlled model aircraft,
boats or cars, we recommend that you ask an experienced
modeller for help.
Thisradiocontrolsystemis designedandapprovedexclusively
for the operation of radio-controlled models. robbe
Modellsport accepts no liability of any kind if the equipment is
used for any other purpose.
Safety notes
Radio-controlled models are not toys or playthings in the usual
meaning of the term,and they should only be operated by young
people under 14 years if an experienced adult is available to
supervise them. Building and operating these models requires
technical expertise, manual skills, a careful attitude and safety-
conscious behaviour. Errors,negligence and omissions in building
or flying these models can result in serious personal injury and
damage to property.
The manufacturer and vendor of the equipment have no means of
checking that the models are built and operated correctly,and for
this reason we can do no more than bring these hazards expressly
to your attention. We deny all further liability.Technical faults,
whetherelectricalormechanical,cancauseelectricmotorstoburst
into life unexpectedly, causing other parts to come loose and fly
around at high speed.Switching on the receiving system when the
transmitterisnotactivecanalsohavethesameeffect.Ineithercase
there is a serious risk of injury.Propellers,helicopter rotors and any
other rotating object which is driven by a motor represent a
constant hazard and a potential source of injury.
Avoid touching such parts at all costs. It is sobering to think
that a propeller revolving at high speed could cut off your
finger.
Whenever an electric motor is connected to a drive battery,never
stand in or close to the primary danger area of the propeller or
other rotating parts. Take care to keep all other objects from
making contact with revolving parts. Protect your radio control
systemfromdust,dirtanddamp.Donotsubjectyourequipmentto
excessive heat,cold or vibration.
Radio control systems should only be used in "normal" conditions,
i.e. within a temperature range of -15°C to +55°C. Use
recommended battery chargers only, and do not charge your
batteries for longer than the stated periods.Read and observe the
informationsuppliedbythebatterymanufacturer.Overchargingor
incorrect charging methods can cause batteries to explode.
Maintain correct polarity at all times.
Avoid subjecting this equipment to undue shock or pressure.
Check your system regularly for damage to cases and wiring. If a
unit is damaged in a crash,or gets wet,it should not be used again
even after you have dried it out thoroughly.The only safe course of
actionistoreplacedamagedequipment,oratleasthaveitchecked
byarobbe ServiceCentre.Faultscausedby damp orcrash-induced
shockmaynotbeobvioustothelayman,butafterashortperiodof
further use they may cause terminal failure. Please use only the
components and accessories which we expressly recommend.
Installing the option modules requires the use of tools.Please take
particular care when using them, to avoid injury. Always use
genuinerobbe-Futaba connectorsandoriginal robbe-Futabaplug-
in crystals.
It is not permissible to make modifications of any kind to the
system components.
Routine pre-flight checks
If there are several modellers at your site,ensure that yours is the
only transmitter on "your" frequency before you switch on the
transmitter.
- Always extend the transmitter aerial fully before operating your
model,and check that it is firmly screwed into its socket.
- Ensure that the throttle stick is at stop / idle before you switch
on the receiver.
- Always switch on the transmitter first,then the receiver.
- Always switch off the receiver first,then the transmitter.
- Carry out a range check before the flight or run.
- Have you selected the correct model memory?
- Check all the working systems.Ensure that the control surfaces
respondtothe stickcommandsin thecorrect"sense"(rightstick
= right rudder etc.),and that the travels are as recommended.
- Are all the mixer functions and switches set correctly?
- Are the batteries sufficiently charged?
- If you are not sure of any point - don’t fly!
Operating the model
- Never fly above spectators or other pilots.
- Donotfly inanywaywhichcouldendangerhumans oranimals.
- Never fly close to high-tension overhead cables or residential
areas.
- Don’t operate your model in the vicinity of canals,locks or other
public shipping routes.
- You must not operate your model from public roads,
motorways,paths,squares etc.
Never operate your equipment in stormy weather.
The transmitter aerial must always be extended fully when you are
actually controlling a model. Don’t "point" the transmitter aerial
straight at the model when flying.The signal generated by the
transmitter is at its weakest in an imaginary line extending straight
from the aerial.It is always best if the long side of the aerial points
towards the model.
If several radio control systems are in use at the same time on
adjacent channels, the operators or pilots should always stand
together in a loose group.Pilots who insist on standing away from
the group endanger their own model as well as those of other
pilots.
Insurance
Ground-based models and gliders (unpowered model aircraft) are
usually covered by standard personal third-party insurance
policies.To fly powered model aircraft you will need to extend the
cover of your existing policy, or take out a specific policy. Check
your insurance policy and take out a new one if necessary.
Liability exclusion
robbe Modellsport are not in a position to influence the way you
install,operateandmaintain theradiocontrolsystem components,
and are not able to ensure that you follow the operating
instructions.
For this reason we are obliged to deny all liability for loss,damage
orcostswhichareincurredduetotheincompetentorincorrectuse
and operation of our products,or which are connected with such
operation in any way.
Unless otherwise prescribed by law,the obligation of the company
to pay compensation is limited to the invoice value of the robbe
products which were immediately and directly involved in the
event which caused the damage.
This does not apply if robbe is found to be subject to unlimited
liability according to binding legal regulation on account of
deliberate or gross negligence.
3

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
1.Set contents
FX-18 NC
1FX-18transmitter,with 8RSZ750mAh NC transmitterbattery
1R-147Freceiver
3S-3001servos,withaccessory pack
1Switchharness with chargesocket
1Pair ofcrystals
Order Numbers
No.F4090 FX-18FM 35 MHz 4/7/3NC
No.F4091 FX-18FM 40 MHz 4/7/3NC
No.F4092 FX-18FM 41 MHz 4/7/3NC(export)
FX-18 NiMH
1FX-18transmitter,with 8NiMH1400mAh transmitterbattery
1R-147Freceiver
3S-3001servos,withaccessory pack
1Switchharness with chargesocket
1Pair ofcrystals
OrderNumbers
No.F4095 FX-18FM 35 MHz 4/7/3NiMH
No.F4096 FX-18FM 40 MHz 4/7/3NiMH
No.F4097 FX-18FM 41 MHz 4/7/3NiMH(export)
Foreword
Wearedelightedthatyouhavedecidedtopurchasetherobbe-Fut-
aba FX-18 radio control system.This equipment is particularly easy
to operate and includes many forward-looking features,setting
new standards in the area of high-performance computer radio
controlsystems.
Operating the FX-18 computer RC system is not difficult,and a
range of convenient mixer functions can be activated simply by
pressing a button.The program structure has been carefully desi-
gned and structured to ensure that you quickly become familiar
with the transmitter’s wide-ranging facilities.These instructions are
intended to help you achieve this aim with minimum effort.
Please read right through these instructions conscientiously
before using the equipment for the first time.
2.General description
2.1Transmitter
The FX-18 transmitter is a sophisticated unit which covers virtually
all the requirements which are made on a modern radio control
transmitter.The FX-18 is a high-performance PCM/FM computer
system,designed for beginners and advanced modellers alike,and
is equally suitable for use with model aircraft,boats,cars and heli-
copters.Thetransmittercaseis ofergonomicallyrefineddesignand
modernappearance,andcanbeusedequallywellhand-heldorina
transmittertray.
The transmitter’s specially moulded side panels fit the hands snu-
gly.All the controls are arranged in easily reached positions,where
they can be operated without having to take your hands off the
sticks.Linearsliderscanbemountedontherearpanelaswellasthe
front face,where they can be operated comfortably with the index
fingers.
A unique feature of this transmitter is the wide range of expansion
options which it can accept,making the unit able to cope with all
modellingapplications,i.e.complexboatsandcarsaswellasmodel
aircraft,boatsand cars.Itis anideal choiceformulti-functionmodel
trucksandboats.
The FX-18 transmitter is equipped with digital trims for all stick
channels, which eliminate the tiresome task of re-adjusting the
trims when you switch to a new model memory.The stick units are
precision-made high-quality assemblies,with variable stick length
andcentringspring tension.
The transmitter features an internal PC interface for direct connec-
tion to a personal computer,enabling the user to archive model
dataorprintout the information.
In contrast to most conventional hand-held transmitters,the FX-18
is designed to accept a range of auxiliary switches to suit the user’s
individual needs.The system provides a wealth of functions and
expansion options which make it unique in its class.Whether you
require multi-channels for auxiliary working systems or a flight
mode switch for the helicopter program - everything you need is
available.
Several option wells are provided in which up to ten switches can
be installed in easily reached positions.Special stick switches are
alsoavailableforinstallationinthestickunitsthemselves.Uptotwo
pairs of mix trimmers can also be fitted.These comprehensive
expansion options give you the means to equip the transmitter in
suchaway thatallyour personalrequirementsare met infull.
Initsstandard formthe transmittercanbe usedbothas trainer and
pupiltransmitterin aTrainer("buddybox") setup,andaDSC facility
isalsoprovided.
A comprehensive range of accessories is available,including trans-
mitter tray,shell handles,various aerials and neckstraps,giving you
the opportunity to customise the transmitter just as you wish.The
standard sets are also available with two different types of battery
forextraversatility.
4

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
Inadditionto itscomprehensive hardwarefacilities,the software of
the FX-18 includes features which go well beyond the standard for
thisclassofequipment.Theprogrammingisbasedonflightmodes,
making it even easier to set up the mixer functions. The user-
friendly software provides many new functions and caters for all
types of model,while the 3-D hotkey makes navigation and setup
straightforward andfast.
For thesakeof clarity someoptionsfeaturesub-menus;thisapplies
in particular to the Parameter menu, in which all the basic
adjustments and settings are carried out. For this reason these
operating instructions deal with this section of the software first
(seeSection 7.1).
The transmitter can directly store and manage data for up to 12
models,but if CAMPac modules are employed there is really no
limit;a single module can store the data for up to 49 models.The
software ispresent inthreelanguages asstandard,soyoucan carry
out the essential dialogue with the system in German,English or
French. The overall structure of the software is based on the
rotation principle, i.e. the individual menus are arranged in a
continuousloop,oneafterthe other,andcan beselectedeasily and
conveniently usingthe3-Dhotkey.
2.2 R147F receiver
This ultra-compact,lightweight FM receiver with PPM modulation
is manufactured using the latest SMT micro-technology,and yet
offers full effective range. Its slim case design, with the servo
sockets in the practical position on the end of the case,makes it an
excellent choice for use in mini- and small models generally,and
eveninpark-fly models and HLGgliders.
The active front end of this receiver provides outstanding narrow-
band characteristics,high adjacent channel separation and very
good interference suppression. A regulatory stage including
automatic gain control (AGC) ensures optimum reception at close
rangeandlongrange alike.
2.3 S 3001 servo
Thisballracedservoisofstandardcasesize.Itisahigh-quality,high-
performanceunit suitable forusein all areasofmodelling,
The special high-quality potentiometer features a 6-finger wiper,
and is housed in a sealed enclosure.The pot is operated by an
‘Indirect Drive’linkage which provides effective protection from
vibration.Theballraceand a specialbronze bearingensurethat the
servo has minimumslopand a long effectivelife.
3.Specification
3.1 FX-18 transmitter
No.ofchannels: .. . . ... . . ... . . .... . .... . . ... . . ... . . .... . ...4
Optionalchannelexpansion: .. . . ... . . ... . . .... .4 additional
Frequency bands: . . ... . . .... . .... . . ... . . ... . .35/40/41 MHz
Spotfrequencies: ... . .... . .... . . ... . . ... . . ...20(+10),22,20
Transmissionsystem: .. . .... . . ... . . ... . . ....PPM (FM) /PCM
Channelspacing: ... . . ... . . ... . . .... . .... . . ... . . ... . .10 kHz
Powersupply: . . .... . .... . . ... . . ... . . .... . .... .9.6V battery
Currentdrain: . . ... . . ... . . ..40/250mA(excl./incl.RF section)
Dimensions: .... . . ... . . ... . . .... . .... . . ..205x 170 x 52mm
Weight (incl.battery): . . . .... . .... . . ... . . ... . . .approx.650g
3.2 R147F receiver
No.ofchannels: .. . . ... . . ... . . .... . .... . . ... . . ... . . .... . ...7
Frequency bands: . . ... . . .... . .... . . ... . . ... . .35/40/41 MHz
Intermediate frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . .455 kHz
Transmissionsystem: .. . .... . . ... . . ... . . .... . .... .PPM (FM)
Channelspacing: ... . . ... . . ... . . .... . .... . . ... . . ... . .10 kHz
Aeriallength: .. . . ... . . ... . . .... . .... . . ... . . ... . . ....100 cm
Operatingvoltage: .. . .... . . ... . .4.8 -6V(4-5cells NC/NiMH)
3.3 S 3001 servo
Torque: . . ... . . ... . . .... . .... . . ... . . ... . . .... . .... . . .30Ncm
Transitspeed: .. . .. . ... . .. . .. . ... . .. . .. . ... . .. . .. .0.165s/45º
Nominalvoltage: .. . . ... . . ... . . .... . .... . . ... . . ... . . ...6.0V
Operatingvoltage: .. . .... . . ... . . ... . . .... . .... . ....4.8 - 6V
Dimensions: .... . . ... . . ... . . .... . .... . . .40.4x19.8 x 36 mm
Weight: . .... . .... . . ... . . ... . . .... . .... . .... . . ... . . ...45.1 g
5

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
4.3 Stick adjustments
Adjusting the stick length
The sticks are infinitely variable in length, and can easily be
adjusted to suit the pilot’s preference.
- Hold part A firmly and unscrew part B,
- Set the stick top to your preferred length,
- Lock part A against part B again.
The short stick tops fitted as standard are ideal for pilots who
prefer to use their transmitter hand-held.If you wish to use the
transmitter in a tray,long stick tops can be used; they are avai-
lable as optional accessories.
Spring tension
The tension of the centring springs on both stick units is infinitely
variable,and can be adjusted to suit the individual pilot’s preferen-
ce.
The first step is to remove the back panel from the transmitter.
The spring tension for each stick function can now be adjusted
using a small screwdriver.
6
A
B
Aerial
Leftoptionwell formixer or
channelswitches
Rearsliderchannel
optionwell
TrainerandDSC socket
Leftstickunit,
functions 2 +4
Right stickunit,
functions 1 +3
Digitaltrimsfor
left stick unit
Transmitter
neckstraplug Digitaltrimsfor
rightstickunit
Right option well for mixer
orchannelswitches
Rearsliderchannel
optionwell
Front sliderchannels
with centre detent
Front optionwellsfor external
switchesandtrimmers
LCD screen
Operatingbuttons
On-Off switch
3-Dhotkey
Aerial
storage
compartment
Chargesocket
Illustration shows expandedtransmitter
4.2 Removing the back panel
Thebackpanelissecuredbymeansofthreelugsatthebottomand
tworotatinglatches at thetop.
Openingthebackpanel
- Using a coin,rotate both latches inwards through 45° in the
direction oftheaerial.
- Fold thetoppart of thebackpanel down until itisalmost at
right-anglestothe case.Take care if there are linear sliders
installed in the back panel - don’t pull on the cables.
- Lift the backpanelup and off.
Closingthebackpanel
- Hold thebackpanel almost at right-anglestothe case and
engagethelugsat the bottom.
- Arrangethecables from thelinearslidersand mixerswitches
etc.neatlybetweenthe circuit boardandthe aerial base.
Takecarethat there arenowires between thecircuitboard and
thebackpanel,norcloseto thelatches.
- Rotatethelatches outwardsuntilthe coin slots arevertical.
4.FX-18 transmitter
4.1 External transmitter features

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
- Rotatethescrew clockwise -> higherspringtension
- Rotatethescrew anti-clockwise -> lowerspring tension
Thewhitearrows in theillustrationindicate the adjustmentscrews;
thescrewson the inside adjustthehorizontal stickfunctions.
Throttle ratchet function
The transmitter is supplied as
standard with four self-
neutralising stick functions.The
ratchet plate is fitted in such a
way that the ratchet has no
effect. The illustration also
shows how the spring tension
adjustor screws are accessed
when the ratchet plate is fitted.
One of the two vertical control planes can be converted to ratchet
action to cope with functions for which a self-neutralising action is
notrequired.Inthiscase thestickstaysatanyintermediateposition
in the fore-and-aft plane,instead of returning automatically to the
neutralposition.Theratchetisgenerallyusedtocontrolthethrottle
ofaglowplugmotor and similarfunctions.
If you wish to engage the ratchet spring,the ratchet plate must be
mounted on the corresponding stick unit as shown in the
illustrationsbelow.
- Firstundo the twoscrews(A) and remove the ratchet plate.
- To place the throttle function on the right stick,the plate has
to be rotated through 90º to the left,and mounted on the
left-hand stick unit (as seen fromtherear).
- To place the throttle function on the left stick,the plate has to
be rotated through 90º to the right,and mounted on the
right- hand stick unit.
- To do this,pressthereturnrocker of thestickunitdown using
thepin(retainer,on the backfaceof the plate).The rocker is
locateddirectlyadjacentto the outsidespringadjustment
screw;it hasaspring attached to it.
- Place the ratchet plate on the stick unit screw dome in this
position,and re-fit thescrews.
- Thepicturesaboveshowthe final installed positionofthe
ratchetplate.
4.4 CAMPac model memory modules
The transmitter’s model memory capacity can be expanded by
fitting "CAMPac" modules.Various CAMPac modules are available,
offeringdifferentnumbersofadditional model memories:
4k CAMPac 3 model memories No.F 1508
16k CAMPac 12 model memories No.F 1509
64k CAMPac 49 model memories No.F 1566
The CAMPac module is plugged onto the pin row with the
appropriatelegendon the circuitboardinside the transmitter.
Switch the transmitter off. Carefully
insert the modulewiththelegend and
lug on the module matching the
diagram printed on the circuit board
itself.
CAMPac modules have to be "initialised" when they are first
pluggedintothe transmitter.
The screen initially shows the
message "CAM 49", confirming the
memory size of the CAMPac you have
fitted.
To prevent accidental over-writing of
CAMPac data, a flashing "OK?"
appears on the screen, requesting
confirmation.
Press the "S" button tostart the initialisationprocess.
The initialisation process commences,
and the screen counts down the
possible number of model memories
as it proceeds.In our example a 64K
CAMPac is fitted,containing 49 model
memories.Once the count-down has
reached zero, the beeper sounds to
indicatethatthe process iscompleted.
TheCAMPacmoduleisnow readyforuse in theFX-18.
TheCAMPacmoduleisformatted usingtheFX-18 format.
If you ever wish to use it in a different transmitter type,you will
needtore-initialise the module.This processerases the FX-18 data.
Individual CAMPac model
memories which have not been
assigned a name are indicated by the
letter "E" and a sequential number.
The "E" stands for external model
memory.
4.5 Changing crystals
Within the fixed frequency band the transmitter and receiver can
be operated on different spot frequencies (channels) by changing
the plug-in crystals. The crystals are located in sockets in the
transmitterandthe receiver,andmustbechanged together.
7
Throttle right Throttle left
Springtension
Ratchet
Ratchet Ratchet
Retainer
Retainer
A
A

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
The spot frequency of the transmitter and receiver must always be
thesame.Youmustuseapairofcrystalsdesignedforthefrequency
bandofyoursystem.Removethetransmitterbackpanel:thecrystal
isontheleft-handsideofthe main circuitboard.
It is not possible to use,say, a 40 MHz crystal in a 35 MHz unit;
the system simply will not work.
Equipment designed for the 35 MHz B-band can also be operated
with crystals for the 35 MHz A-band, and vice versa, but a
conversion is required.This work can be carried out by the robbe
ServiceDepartment,and is offeredat a fixedprice.
Be sure to use only genuine crystals from the robbe-Futaba
range,and use only those frequencies which are approved for
model use in your country, as listed in the frequency table
supplied.
4.6 Changing the transmitter battery
The FX-18 radio control system is available with two different types
oftransmitterbattery:
1.NC sets (No.F 4090 to F 4092) with 8-cell nickel-cadmium (NC)
battery,capacity750mAh;
2.NiMH sets (No.F 4095 to F 4097) with 8-cell nickel-metal-hydride
(NiMH)battery,capacity 1400 mAh.
Changing the transmitter battery
- Removethetransmitter backpanel(seeSection 4.2)
- Disconnect thebattery connectorfromits socket
- Release thetransmitterbatteryfromthe battery cradle-it is
securedwithdouble-sided adhesive tape
- Peeloff anyadhesiveresidue if necessary
- Attachthenew batterywiththedouble-sided tape supplied
- Connect thebatterylead.
The following replacement battery types are available:
No.4462 8 RSZ 750 mAh NC Operating time approx.3 hours
No.4461 8 RSZ 1500 mAh NC Operating time approx.6 hours
No.4463 8NiMH1400 mAh Operatingtimeapprox.6 hours
No.4460 8NiMH2200 mAh Operatingtimeapprox.9 hours
4.7 Installing and connecting option modules
An outstanding feature of the FX-18 transmitter is the wealth of
expansionoptionsitoffers.
You can install linear sliders, mixer switches and external mix
trimmers to suit your own requirements.The first step is to decide
on an option well where you can reach the control most easily,
withouthavingto let goofthe sticks.
A total of 4 option wells is available for linear sliders,plus 12 option
wellsfor mixerswitches,channel switches andmixtrimmers.
Thefollowing expansionmodulescan be installed andconnected:
- 2 linear sliders (front panel),2 linear sliders (back panel)
- up to 10 mixer switches or channel switches
- up to 2 pairs of external mix trimmers (No.F 1506)
- 1 Multi-Switch module (up to 32 switched channels,
see Section 11)
- 2 stick-top switches
Please work carefully when connecting expansion modules to
avoiddamaging the transmitterelectronics.
- Switchoffthe transmitterbefore installinganoptionmodule
- Removetheback panel (Section 4.2)
- Disconnect thebattery lead.
- To install switchesinthesewells,push throughthethininner
skin at thepreparedhole position usingapointed object.
- Open up the hole to the final diameter of 6 mm using a 6 mm Ø
drillorscissorblade,holding the toolinyour hand.
- Placetheswitch in theholefrom therearand position it inthe
holder,thenfit thenuton thefront andtightenitcarefullyusing
an8mmA/F spanner.
- Bend thecablefrom the switchvirtually atright-angles,to
ensurethatthere isstilladequate spaceforanysliderwhich you
maywishto install inthebackpanel.
Take care to arrange the cables neatly!
8
Transmitter crystals
bear the
abbreviation
TX + channel
number.
Receiver crystals
bear the
abbreviation
RX + channel
number.
Dual-conversion
receiver crystals
bear the
abbreviation
RX-DS + channel
number. Installing mixer and channel switches in the outer option wells
Installing the mixers and channel switches
in the inner option wells

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
There are two alternatives for installing controls in the inner
option wells:
1. Cutaholeinthealuminiumpanelattheswitchsymbol position,
using a hand-held 6 mm Ø drill bit,or
2. Use a ready-made die-cut panel,which is available under
No.F 1589.The set includes 12 rubber plugs which are used to
seal any openings which are not used,e.g.after re-positioning
switches.
In all other respects the switches are installed and secured exactly
as described previously in this section.
Here again there are two alternative methods of installation:
1. Cut two holes in the aluminium panel at the switch symbol
position,using a hand-held 6 mm Ø drill bit,or
2. Use a ready-made die-cut panel,which is available under
No.F 1589.The set includes 12 rubber plugs which are used to
seal any openings which are not used,e.g.after re-positioning
switches.
Eachmixtrimmermoduletakesupthreeinneroptionwells.Amaxi-
mum of two modules can be installed:one right,one left.
- Drill holes in switch well positions 1 and 3.
- Fit the module from the rear with the connecting lead termina-
ting in the 2-pin plug at the top,pointing towards the aerial.
- Fixthe moduleto thetransmitterusing thescrews supplied(see
arrow).
- Push the trimmer knobs onto the pot shafts.
- Ensure that the index line on the knob lines up with that on the
pot shaft.
- Secure the trimmer knob with a 1.5 mm allen key.
Take care to arrange the cables neatly!
- To install the front linear sliders,press the blind cover out from
the rear of the transmitter using a screwdriver.
- Carefully install the slider with the cable pointing down
(towards the battery).
- Route the cable under the main circuit board and connect the
slider.
The circuit board is mounted on stand-off pillars to provide space
for the cables.
Donotrunthecablesoverthecircuitboard,otherwisetheywill
be jammed between the circuit board and the back panel.
- Carefully fix the slider in place from the front using the screws
supplied.
- Peel off the protective film and apply the self-adhesive scale
label.
- Carefully push the knob onto the slider shaft.
- Check that the slider works smoothly,then re-attach the back
panel.
- Carefullypushout therearblind coverof the sliderslotfrom the
inside of the transmitter using a screwdriver.
- Install the slider from the rear,with the cable pointing up,
towards the latch.
- Carefully fit the retaining screws from the outside to secure the
unit.
- Each linear slider is supplied complete with one left-hand and
one right-hand knob.
- Select the appropriate knob to suit the side of the transmitter,
and push it onto the slider shaft.
- Check that the slider works smoothly,then re-attach the back
panel.
9
Installing mix trimmers (F 1506) in the inner option wells
Installing the front linear sliders
Installing the rear linear sliders

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
4.8Transmitter battery voltage display
The voltage of the transmitter battery
is displayed inVolts on the large LCD
screen.
In the example shown the voltage of
thetransmitterbattery is10.3V.
4.9 Low battery voltage alarm
As soon as the battery voltage falls to a certain pre-set value,visual
and audible alarms are triggered to alert you to an impending flat
transmitterbattery.
The battery symbol on the screen
flashes,and the beeper sounds.The
trigger threshold for the battery
alarm can be set to any value in the
range8.5-9.6Vinincrementsof0.1V.
(See alsoSection 7.1.8)
4.10 Charging the transmitter battery
The battery should be charged for 24 hours at a rate of 1/10 its
nominalcapacitybefore thetransmitteris used.
After use,and after any long period of storage,all the RC system
batteries should be given a charge lasting at least 14 hours at the
1/10 rate (slow charge rate),regardless of the length of the prece-
ding usage.The slow charge compensates for the batteries’self-
dischargecharacteristic,and balances thecells’state ofcharge.
(Example:750 mAh battery:standard charge current = approx.75
mA)
Theself-discharge rateofNC cells isaround1%perday.Thismeans
that after 100 days a previously fully charged battery will be com-
pletely discharged,without ever having supplied current to any
load.
NiMHcellshavethesameself-dischargecharacteristic,butata hig-
her rate of around 2-3% per day;the pack will be completely flat
after about35-50days.
The transmitter battery can be charged and discharged without
removingitfrom the case.
The charge socket is located next to the On/Off switch in the right-
handsidepanel.
If you wish to charge the transmitter or receiver batteries at a hig-
her current than the 1/10 rate,be sure to use an automatic charger
witha"Delta-Peak"terminationsystem.
We recommend the following battery chargers:
1.Forsimple charging,e.g.Lader5,No.8308
10
Connecting the option modules to the circuit board
1. Connector for channel switches and linear sliders,chan-
nels5to8
2. Connectorfor8 external mixerswitches
3. Trainerswitchsocket
4. Connector for mix trimmers;if 2 mix trimmers are to be
installed,the power supply cable for the second module
ispluggedintothe first module.
Basic menu
Mixer switch assignment:
1=On-OffV-mix 1
2=On-offV-mix 2
3=On-offV-mix 3
4=On-OffDualRates
5=Throttlecut
6=unused
7=unused
8=unused
Mix trimmer assignment:
1=MixerinputV-Mix1
2=MixerinputV-Mix2
3=MixerinputV-Mix3
4=unused
5=unused
6=unused
7=unused
8=unused

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
2. For optimum battery maintenance we recommend the "Reflex
Charger",No.8363.The special reflex charging process prevents
undesired memory and "lazy battery" effects;using this charger
ensures that you always have full battery capacity available.
If your system includes an NiMH battery you must use a charger
with a reliable automatic charge termination system,as these bat-
terytypesaresensitivetoovercharging.Theadvantageofthereflex
charging process with these packs is that only the quantity of
energyremovedfromthe pack is chargedbackinto it.
In principle all rapid chargers with "automatic charge termination"
canbeused.
The transmitter and receiving system can only be charged if they
areswitchedoff beforehand.
Notethat themaximum chargecurrent forthe transmitter bat-
tery when using a rapid charger must not exceed 2 Amps.
The charge circuit in the transmitter is equipped with an electronic
fuse(polyfuse),whichprovideseffectiveprotectiontothetransmit-
terbatteryifit is chargedattoo high acurrent,or if thecharge lead
isshort-circuited.
However,the point at which the fuse is triggered varies according
to the charge current and the battery type,so it is still essential to
avoidshort-circuiting thechargelead.
Always start by connecting the banana plugs on the charge
lead to the charger.
Ensure that the charge lead is connected with correct polarity;
the fuse does not provide protection against reverse polarity.
Thereceiver battery canbeleftinthe model forrecharging.
You can use a switch harness with integral charge socket (No.F
1407) if you wish to avoid disconnecting the battery from the
switchharnessevery timeyoucharge the battery.
After a lengthy period of storage (Winter break), the batteries
should be cycled (discharged and recharged) several times before
re-use.This process balances the packs,and restores them to full
capacity andoperatingtime.
To protect the environment,take defective or exhausted batteries
toyour localtoxicwastecollectioncentre.NCbatteriesinparticular
are categorised as toxic waste.On no account dispose of old batte-
riesinthedomestic waste.These batteriescanbe recycled.
4.11Trainer mode
Trainer mode (sometimes known as a "buddy box" system) is an
excellent way for learners ("students") to learn the art of model fly-
ingwiththehelp of a flighttutor("trainer").
The tutor controls the model during the launch and landing pha-
ses,but transfers control to the learner by operating a push-button
orswitchwhen the model isinasafe position.
If the model gets into a potentially dangerous flight attitude or
situation,the tutor releasestheTrainer buttonandresumescontrol
of the model.This method provides a very easy way for beginners
to learn the art of model control in easy stages,without having to
worry constantlyaboutdamageor loss of themodel.
The FX-18 transmitter is fitted as standard with aTrainer socket (A)
forTrainer operations;it is located on the front panel of the trans-
mitter.The FX-18 can be used either asTrainer or Student transmit-
ter.
The circuit board features a miniature switch marked TRAI - STUD.
Thisis usedtodetermine whetherthe transmitteristobeoperated
astheTrainerunit(TRAI) or Student(STUD)unit.
Carefully move the switch to the appropriate position using a pair
oftweezers.
The trainer and student transmitters are inter-connected using a 2-
coreTrainerlead.
The following cables are available:
(seealsothediagrams and recommendedaccessories on page54.)
- No.8377FXtrainer lead,connects twoFX-18transmitters to
eachotherorone FX-18 toanFX-14transmitter.
- No.8362F->FXtrainer lead.This leadisrequired if youwishto
usean FX-18transmitterasstudenttransmitter,connectedtoan
F-seriesRC system(F-14,FC-16,FC-18 orFC-28)fittedwith aTrai-
nerModule4.
An adaptor lead is also available under No.F 1581 for connecting
this lead to the F-series Trainer Module 3 (DIN 6-pin plug), and
robbe-Futaba hand-held transmitters.Read the instructions regar-
ding Trainer mode in the operating instructions supplied with
thesetransmitters.
If the FX-18 system is to be used as theTrainer transmitter,you will
alsoneedto install aTrainertransfer switch,e.g.No.F 1524,whichis
usedtotransfer controlbetween thetwotransmitters.
On the circuit board you will find a socket for this switch,located
adjacenttotheTRAI-STUD selectorswitch.
A battery must be fitted to the student transmitter forTrainer
mode operations.
- Removethetransmitter crystal or RF modulefromthe student
transmitter,sothatitcannot radiateanRFsignal.
11
Trainertransfer switch
e.g.No.F 1524
A

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
- InstalltheTrainertransferswitchin theTrainer transmitter,and
connect ittothe appropriate socket.
- Movethe"TRAI-STUD"switchto the appropriateposition.
-The Student transmitter must be set to the same modula
tion (PPM or PCM) as theTrainer transmitter.
- Thechannelsequence of both transmittersmust be the same,
anymixers inusemust be the same,andthethrottle function
must be on the same stick.If the settings are different,you must
changethestickmode in the Parametermenu(MODE) on the
Studenttransmitter.
- Connect theTrainerandStudent transmittersusingtheTrainer
lead.
- Switchonboth transmitters.
- Checkthatallfunctionsworkcorrectly,then operate theTrainer
switchandcheck that the Studenttransmitterhas full control.
- CheckthattheTrainertransmitter regainscontrol whenyou
switchback.
- Themodelaircraft is launched withtheTrainerat the controls,
andtakentoa safe height.AtthispointtheTrainertransfers con
troltothe Student.In critical or difficultsituationsthe tutor
releasestheTrainerswitch,regainscontrol,andrescuesthe
model.
4.12 DSC mode / use with a flight simulator
A DSC lead (Direct Servo Control) can be connected to the barrel
socket on the transmitter front panel.This provides a direct means
of controlling the receiver and the servos connected to it,without
the transmitter radiating an RF signal.This can be very useful,for
example,if you want to carry out adjustments on your model,but
"your" spot frequency is in use by another modeller.To complete
theconnectionyouwill need the FXDSClead (Order No.8335).
Note: to prevent Radio Frequency transmission the transmitter
crystal must be removed.
The "TRAI-STUD" switch must be at the "STUD" position.
DSC mode can only be carried out in conjunction with a receiver
which features a DSC socket (marked "C"),e.g.R-118F receivers.Set
theappropriatemodulation (PPM/PCM) tomatchthe receiver.
To connect the transmitter to a flight simulator you require the
adaptorlead,No.8383,andthetransmittermustbesetto PPM(FM)
modulation.The "TRAI-STUD"switch mustalso be setto the"STUD"
position.
4.13 Data transfer to a PC
The FX-18 transmitter is equipped
internally with a PC interface socket.
This socket is marked "DATA", and is
located on the right-hand side of the
circuitboard.
Special software is in preparation
which allows you to call up,store and
printoutmodeldata stored onthePC.
5.Connecting the servos
Thesequenceofservoconnections atthe receiverispre-defined,as
manymixerfunctionsinthemodeltypemenusGlider,Powerand
Heliare pre-programmed.Thesemixersaredescribed inthe appro-
priatesection.
If you have not activated any mixers,the servo sequence can be
chosen at will,but we recommend that you set up and adhere to
your own standard sequence,or keep to the pre-set assignment,
otherwise you will end up with models which require different
arrangements,and this can easily lead to potentially dangerous
confusion.
Servo assignment in the Basic menu:
Channel1: Aileron
Channel2: Elevator
Channel3: Throttle/ airbrakes / landingflaps
Channel4: Rudder
Channel5: Auxiliary channel
Channel6: Auxiliary channel
Channel7: Auxiliary channel
Channel8: Auxiliary channel
Please refer also to Section 7.1.2, Transmitter stick mode
(MODE),with regard to servo assignments.
6.Using the transmitter for the first time
6.1 Screen and keypad
The user controls the software of the FX-18 radio control system by
programmingand "conversing"with it,andthemeans ofthisdialo-
gue is the large LCD screen,the input buttons Select (S) and Home
(H),and the multi-function 3-Dhotkey.
The 3-D hotkey,with its convenient handling,is an important part
of the system,as it provides a fast method of moving through the
individual menus and a quick,simple method of setting the appro-
priatemixer values.
Section 6.3, "Summary of the menu structure", describes the
method of finding your way through the menus using the controls
provided.
If necessary,choose the function“Language select”now (see
section 7.1.7).
6.2 Selecting a Home menu
When you first switch on the transmitter you initially see the "FX-
18" name displayed briefly,which is replaced
by the name of the model (model memory)
youlastused;inthiscase EASY.The nameflas-
hes.
Press the 3-D hotkey briefly to confirm the
modelmemory.
If you have not assigned a model name,the
memorynumber(M-01)appearsasthename.
Inthe topright-handcornerthescreendisplaysthespotnumberof
theselectedmodelmemory.
This process is intended to ensure that the user is deliberately
madeawareof the modelmemory hehasselected.
However,the selected model memory remains active even if
you do not confirm it.
12

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
If you now rotate the 3-D hotkey (to left or right),you will find
four different Home menus.
Home menu 1 Displayof:
- modelname(M-01)
- Voltage (10.1V)
- Model memory number (01)
Home menu 2 Display of:
- Model memory operating time
(1hour23min)
- Voltage (10.1V)
- Model memory number (01)
The operating hours timer is useful as it gives you a constant check
of the transmitter battery capacity.When you recharge the trans-
mitter battery you should remember to reset the timer to zero by
pressingthe3-D hotkey twice briefly.
Thetimerdepends on the modelmemory.
Home menu 3 Displayof:
- Stopwatch(2min 35 sec)
- Voltage (10.1V)
- Model memory number (01)
The stopwatch settings are adjusted as described in Section 8.15.
This menu is only used to display the stopwatch and reset it to the
initialvalue;this isdoneby pressing the3-Dhotkeytwice.
Home menu 4 Displayof
- Stopwatch(1min 59 sec)
- Operatingtime(87 minutes)
- Model memory number (01)
This is a combination display of the two timers;the operating time
is displayed in minutes = 87 minutes (max.display 199 minutes),in
contrasttoHome menu 2=1hour 27 min.
In this menu you can reset the stopwatch to the initial value by
pressing the 3-D hotkey twice.The operating hours display is reset
inHomemenu2.
6.3The FX-18 menu structure
The software of the FX-18 makes available comprehensive set-up
facilitiesforthe varioustypesofradio-controlledmodels.TheFX-18
transmitterisequipped with a triedandtested method ofsoftware
controlwhichallows youto navigateboth forward andbackwithin
themenustructure.
This saves the constant,tiresome need to "leaf through" the setup
menus,ifyouhaveaccidentallyskippedthefunctionyouwished to
use.The menu structure is shown in graphic form in these instruc-
tionsforeach of the modeltypes.
Home menu level
The top Home menu level embraces all those functions which are
important when the system is actually in use,such as model name,
voltage,operatingtime,stopwatch.
Rotate the 3-D hotkey to change to the display you wish to see.
Select menu level
Thenextleveldown is themenuin which youselectfunctions.
- To eliminate thedangerofchanging a settingaccidentally,you
musthold the3-Dhotkeypressedinforonesecondinorderto
reachthislevel.
-Rotate the 3-D hotkey to "leaf through" within this menu until
youarrive atthedesiredfunction.Atthispoint the selected
function flashes.
-Pressing the3-Dhotkey takes you tothesetup menu forthe
function youhaveselected.
- Holdthe"H" buttonpressedin foronesecond toreturntothe
Select menu level.
- Holdingthe"H" button pressed in for one second again takes
youbackto the Homemenulevel.
Setup menu level
- Within the setup menu you move around using the "S" button
(forward) and the "H" button (back).
- The 3-D hotkey is used to adjust the selected setting (change
thepercentagevalue,switch themixer on/offetc.).Theset-up
featureyou haveselectedflashes on the screen.
- To quit the Setup level hold the "H" button pressed in for one
second;this takes youbackto the Select menu level(selected
function flashes).
- A further one-second press of the "H" button takes youback
totheHome menu level.
All adjustments and changes apply only to the currently active
model memory.All changes and settings are stored immediately,
anddonotneed to beconfirmedseparately.
Thetransmitterreadsthedataintoanareaof workingmemory,and
savesthedatain thecorrespondingmodelmemorywhenit isswit-
chedoff.
13

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
7.Basic functions menu structure (BASC)
The basic transmitter settings are grouped together in the (BASC)
menu.The Basic program is intended for simple models, and also
for use with model boats and trucks. If you wish to operate more
complex models such as power model aircraft (ACRO), gliders
(GLID) and helicopters (HELI),special mixer functions are provided
under the menu point "TYPE" (see Section 7.3).The specific mixers
are described in detail in Sections 8,9 and 10.
The following flow chart shows the menu structure of the BASC
functions; it also shows the associated sub-menus and the Home
menus.
14
Home menu
Setup menu level
1 sec
1 sec
1 sec
Page 17
Page 18
Page 18
Page 15
Page 19
Page 19
Page 19
Page 20
Page 20
Page 21
Page 21
Page 21
Page 23
Page 24
Page 24
Page 24
Page 25
Page 26
Key:
Rotate3-D
hotkey
Press"S"
button
Press"H"
button
Press3-D
hotkey
Select menu level
Alternately

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
7.1 Parameter menu (PARA)
The Parameter menu,like all the other
menus,is incorporated in the endless
rotationloop oftheSelect menulevel.
All the basic (global) settings are
adjustedinthis menu.
Paradoxically the last menu point is
described here first; there are good
ergonomicreasonsfor this.
If you rotate the 3-D hotkey to the left, then "PARA" is the first
menuyousee,anditis alsothefirst oneyou needinordertoset up
theglobalfunctionsfor aparticular model.
When you are using the system,however,the most common menu
you need will be "Model", which is also the first one you reach
when you rotate the hotkey to the right.
This eliminates the time-consuming business of leafing through
unnecessary menus.
TheSetuplevelalsooperatesusingthis logic;if youjump tothe left
with the "H" button,a mixer function is switched on or off.If you
jump to the right with the "S" button you jump to the percentage
valuesettinginthemenu,whichisthemost frequentlyusedoption
whensettingupa new model.
Move to the Setup menu level "PARA" via the Select menu, as
showninSection 7.
The setup menu "PARA" contains 10 sub-menus which are
explained in the following section.
Theten optionsarearrangedinaloop,andwithin thisloop youcan
always move forward with the "S" button, and back with the "H"
button,in each casegivingashort press.
Alongerpress(about1second)onthe"H"buttontakesyoubackto
onelevelhigher in the menusystem.
7.1.1 Modulation setting (MODU)
This function is required in order to set the desired modulation,i.e.
PCMorPPM (FM).Ifyouare usinganFM receiver,youmust set PPM
mode(P)onthe transmitter.
APCMreceiverrequiresPCM mode (C).
In PCM mode you can only use genuine robbe-Futaba and
Futabareceivers.Donot expectother makesofPCM receiverto
be compatible.
PCMmodulationdiffersinpracticeasfollows:whenanFM systemis
operated at the extreme limit of range,or when motor interference
occurs,the servos tend to jitter,and PCM modulation suppresses
this effect.The receiver achieves this by storing the signals briefly.If
invalid or incorrect signals are picked up by the receiver, it
continues to give out the stored signals until it picks up correct
signalsfromthe transmitter again.
See alsoF/S(Fail-Safe),Section 7.16.
We recommend that you use a PCM connection if you know that
reception conditions are difficult. For example, if your model is
powered by a large petrol engine with magneto ignition, or a
powerful electric motor.
Switching modulation
- Select the MODUsub-menuinthe PARA menu
- Rotatethe3-Dhotkey
- totheleft forPPM (FM),screenshows (P)
- totheright for PCM,screen shows(C)
- If you change the setting,the PPM or PCM symbol on the screen
flashes.
- The actual transition to the new transmission mode only
occurs when you switch the transmitter off,and then on
again.
- Thefactthatthetransmission mode onlychangeswhen you
switch the transmitter on and off is particularly important when
youareselectinganewmodel,asthetypeofmodulation is
storedindividuallyin each model memory.See also Section 7.2.
Check that the modulation setting is correct when you switch
the transmitter on again.The screen will show the symbol PPM
or PCM.
7.1.2 Stick mode (STCK)
The assignment of the receiver outputs is pre-defined,in order to
allowforthe pre-programmedelectronicmixer functions.
It is still necessary to set up the
transmitter to suit your chosen stick
mode, and this is carried out in this
sub-menu.
Basically all you have to do here is
define the stick to which the non self-
neutralising ratchet function (to control the motor or airbrake
function) is tobeassigned (see alsoSection 5).
There are four alternative stick modes (modes 1-4):
MODE 1:(default)
Aileronright(Q)
Elevatorleft (H)
Throttleright(G)
Rudderleft (S)
MODE 2:
Aileronright(Q)
Elevatorright (H)
Throttleleft(G)
Rudderleft (S)
MODE 3:
Aileronleft(Q)
Elevatorleft (H)
Throttleright(G)
Rudderright(S)
15
G
G
G
S
S
S
Q
Q
Q
H
H
H

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
MODE 4:
Aileron left (Q)
Elevator right (H)
Throttle left (G)
Rudder right (S)
The servo connections at the receiver are the same for all stick
modes.
Channel 1: Aileron
Channel 2: Elevator
Channel 3: Throttle / airbrakes / landing flaps
Channel 4: Rudder
Channel 5: Auxiliary channel
Channel 6: Auxiliary channel
Channel 7: Auxiliary channel
Channel 8: Auxiliary channel
In the Parameter menu use the "S"
button or "H" button to move to the
menu point "MODE". Rotate the 3-D
hotkey to select one of the four stick
modes MODE 1-4.
7.1.3Throttle reverse (TREV)
With this option you can determine whether the full-throttle posi-
tion is to be at the forward or back end of the stick arc.
When you select this menu,the channel number "3" (throttle func-
tion) flashes on the screen.A small arrow below the channel num-
ber (reverse) or above the channel number (normal) indicates the
current status.
N = Normal = Full throttle forward
R = Reverse = Full throttle back
You can reverse the throttle function by turning the 3-D hotkey to
the left; rotating it to the right restores the normal condition.(See
also Section 7.1.4:Asymmetric throttle trim.)
7.1.4 Asymmetric throttle trim (ATL)
This function is used to determine whether the trim for the throttle
function is to be effective over the full arc of travel,or only at the
idle end. For controlling the carburettor of internal-combustion
engineswerecommendswitchingthis functionon,sothatthe trim
only affects the idle end of the motor’s range, and not the full-
throttle position.
When you select this function, the
symbol "OFF" flashes on the screen.
Turning the 3-D hotkey to the right
switches it "ON"; turning it left swit-
ches it "OFF".
This function must be combined
correctly with the throttle rever-
sefunction;see Section 7.1.3.It is
important to ensure that both
the throttle direction and the
throttle trim are set correctly.
--
7.1.5 Dual Rates switch (DRSW)
Inthismenuyoucandeterminethefunctionorfunctionswhichare
affected by the Dual Rates switch.The Dual Rates switch is connec-
ted to socket 4 on the circuit board (see illustration,page 10).You
can set the switch functions you prefer by rotating the 3-D hotkey
to left or right.
The associated DRSW number flashes on the screen, and a small
arrowbelow thefunctionnumber indicatestheassignmentclearly.
(See Section 7.8 for an explanation of the D/R function and for
details of setting the values.)
There are four options here:
7.1.6 Audible sounder (BEEP)
Thisoptionallowsyoutoswitchoffthebeepsignal,whichconfirms
each keypad action and each entry.
Even if you switch off the beeper,the alarm functions continue to
trigger the beeper,i.e.the mixer alarm and the low battery alarm.
Of course,the audible confirmation beeps will only be heard if the
beeper is switched on.
Turn the 3-D hotkey to the right to
switch the beep "ON"; turn it left to
switch the beep "OFF". The beeper
sounds briefly when you switch it on.
7.1.7 Language select (ENG)
The FX-18 software is present in three languages as standard; the
languages available are German, English and French.In this menu
you can select the language of your choice.
When you select this option, the currently active language is dis-
played flashing on the screen.
Rotate the 3-D hotkey to right or left
to select a different language for the
screen displays.
DEU = German
ENG - English
FRA - French
16
Trim
range
Normal Reverse
DRSW 1
1-Ailerons DRSW 2
1-Ailerons
2-Elevator
DRSW 3
1-Ailerons
4-Rudder
DRSW 4
1-Ailerons
2-Elevator
4-Rudder
H
S
Q
G

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
7.1.8 Low voltage alarm (VOLT)
In this menu point you can adjust the voltage at which the trans-
mitter’s low voltage alarm is triggered.The range of adjustment is
from 8.5 to 9.5Volts in 0.1Volt increments.
When you select this option, the cur-
rently set low-voltage threshold flas-
hes on the screen.
Rotate the 3-D hotkey to set your pre-
ferred voltage threshold.
The purpose of this function is to adjust the low-voltage alarm to
suit different types and capacities of battery.
Caution:
Please don’t be tempted to see too low an alarm threshold. For
safety’s sake it makes more sense to set the threshold slightly too
highthantoo low.The nominalvoltageof an 8-celltransmitter bat-
teryis9.6Volts,andthepackiscapableofmaintainingthisvaluefor
a long time before it slowly starts to decline towards 8.8 Volts.
Around this value the battery voltage starts to fall off more rapidly.
Usually this "kink" in the voltage curve occurs around 1.1 Volts per
cell,i.e.8.8 Volts for the transmitter battery as a whole.
If you use a battery of relatively low capacity, or an NiMH battery,
we recommend setting a slightly higher threshold value (approx.9
Volts),so thatthereis still plenty oftimefor youto land yourmodel
safely,especially if you are flying a glider at a great height.
Insomeotherapplications you willalways beableto switch offthe
transmitter safely very soon after the low voltage alarm is trigge-
red,and insuchcases itmay wellbe safeto reducethe thresholdto
8.6 Volts in order to obtain longer operating times.You can estab-
lishexactlyhow longtheresidualoperatingtimeisbyswitchingon
the transmitter in your modelling workshop, with the aerial fitted
and extended. Measure the time between the low voltage alarm
and the absolute bottom limit for the operating voltage, which is
7.5Volts.
7.1.9 Multi-Switch-Prop function (MULT)
If the transmitter is set to PCM modulation,it is necessary to select
the transmission channel or channels for the Multi-Switch or Multi-
Propexpansionmodulesat thetransmitter.Thisprocessesswitches
thosechannelsto thespecialmodulation requiredfor Multi-modu-
les. A channel set up for Multi-Switch-Prop transmission is no
longer available for a "normal" control function and mixers.
Important: the system will only work with PCM modulation if the
slideswitchontheMulti-SwitchorMulti-Propdecoder isalso setto
PCM mode. If you use FM mode no changes are required at the
transmitter; however,the Multi-decoders must still be switched to
PPM modulation.
You can select up to two channels from channels 5…8 for Multi-
Switch-Prop operations by rotating the 3-D hotkey.
- Turning the hotkey to the left
activates the 1st channel
(left number) from 5…8,or
de-activates it if you select "-".
- Turning the hotkey to the right
selects the 2nd channel
(right number) from 5…8,or
de-activates it if you select "-".
In our example channels 5 and 6 are active for Multi mode.
If no Multi-modules are connected,
you must not select a channel for this
mode.
Setthedisplay to"- -" toswitch offthe
Multi-module function.
7.1.10 Model memory reset (REST)
In this menu you can erase the model data in the currently active
model memory,i.e.set the memory back to the factory default set-
tings(Reset).
Reset (erase process)
- Press the 3-D hotkey;the screen displays OK? to check that you
really want to erase the data.
- If you do not want to erase the data,release the 3-D hotkey
immediately.
- If you do want to erase the data,hold the 3-D hotkey pressed in
forabouttwo seconds.
- Thesymbols"SET" and "REST" (reset)nowflash in theinitial
display,andthebeepersounds once toindicatethat erasureis
actually taking place.
- Whenthememoryhasbeenerased,the beepersoundstwice
andthe"REST"display stopsflashing.
7.2 Model memory select (MODL)
As standard the transmitter provides
12 model memories,and all the set-
tings you make are stored in them.
This is a very convenient method of
storing individual settings for diffe-
rent models and applications,which
can be called up again quickly when needed.To help you manage
the memory system,each model memory is numbered,and you
canalsoassigna short modelnameof 4 letterstoeach one.
CAMPac model memory modules can also be employed to expand
themodelmemorycapacityvirtuallywithoutlimit(seealsoSection
4.4).
Move to the Select menu level and turn the 3-D hotkey until
"MODL" appears on the screen.A short press on the 3-D hotkey
switchestoSetupmode.
- Thescreenshows the activemodelmemory;in thiscaseNo.10.
- Turnthe3-Dhotkey to select anewmodelmemory (9).The
screendisplaysthe currently activememory (10)atthetop,and
the newly selected memory (9) at the bottom.
- Holdthe3-D hotkeypressedin fortwoseconds,andthesystem
acceptsthenewmodel memoryandmakesit active.
The beeper sounds to confirm this,and the screen shows the
newly selected model memory at both positions.
Important note:
The type of modulation - PCM or PPM - is stored with each
model.
If the modulation stored in the newly selected model memory
is different from the one you have just used,the PPM or PCM
symbol on the screen flashes.
This indicates that you must switch the transmitter off and on
again in order to confirm the switch to the new modulation.
17
1st Multi-
channel 2nd Multi-
channel

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
The menu for model memory selection (MODL) also includes furt-
her functions which are indicated by the right-pointing arrow.A
brief press on the "S" button takes you to the next menu point:
model memory copy.
Model memory copy (COPY)
This function is used to copy the contents of a model memory.This
is a very useful function when you wish to program a model which
issimilartoan existing one.
All you do is copy the contents of one model memory to another
free memory,change the model name and correct the settings for
the new model.This saves the bother of entering the basic func-
tionsforthenewmodel,andshortenstheset-uptimeconsiderably.
- InitiallytheCOPYmenu showsthesame modelmemoryinboth
positions.
- Turnthe3-D hotkey toselectthemodel memoryintowhich the
copy is to be placed.
- Theuppermodel memory number(10)shows the source,from
which thedataisto be copied,and the bottomone(9)the
destination,into which it is tobecopied.
- Hold the3-Dhotkeypressedin for 2seconds.
- Thebeepergives an audibleindicationofthe progressofthe
copyprocess:
- 1xbeep-> start ofthecopy process
- 2xbeep-> end of thecopyprocess
The model data from the current memory (10) has now been
copied into the newly selected one,but you have not yet switched
to the new model memory. If you want to activate the new
memory,you must use the Model Memory Select menu,as already
described;this is accessedbypressing the "H"button.
Entering the model name
If you press the "S" button again,you move to the Setup menu for
themodelname.
- Firstthe initial letter(here"M") flashes;byrotatingthe 3-D hot
key youcanselectanyletter or numeralwithwhich to start the
modelname.Somespecialsymbols are alsoavailable.
- Pressthe"S"buttonagaintomovetothenextletter;press"H"to
moveback again.
- Atotalof four letterscanbe entered forthe model name.Once
youhaveenteredthe last letter,thearrowon the screendisap-
pears to indicate that you cannot enter any more letters.Hold
the"H"buttonpressed in forone second tomove onelevel hig
her into the Select menu level.
7.3 Select model type (TYPE)
To control sophisticated model air-
craft many automatic links (mixers)
between the transmitter controls are
generally required.To make it easier
fortheuser tosetup such models,the
FX-18transmitterprovidesawealthof
pre-programmed functions (mixer
menus).
The new function menus are included in the existing Base menu;
theyarelocated beforethebase menu "PARA".
The 3-D hotkey and the screen are used to activate the mixers
requiredfor themodelinquestion,andtoset the mixervalues.
The mixer menus have been carefully optimised to suit the model
type youhaveselected.
Thefollowing modeltypesareavailableforyou toselect:
BASC
Base menu for setting up the stan-
dard functions,and for operating sim-
ple models; also for multi-function
modelssuchasboats and trucks.
ACRO
In addition to the base menu this
option activates special pre-pro-
grammed mixer functions designed
forpoweredmodelaircraft.
GLID
In addition to the base menu this
option activates special pre-pro-
grammed mixer functions designed
formodelgliders.
HELI
In addition to the base menu this
option activates a comprehensive set
of pre-programmed mixer functions
designedformodel helicopters.
Selecting the model type:
- Select the TYPE menu and pressthe3-D hotkey.
- Rotatethehotkeyto select the model type BASC-ACRO - GLID
orHELI.
-Press the 3-D hotkey,and the screendisplays thesecurity
query OK?;hold the hotkey pressed in until the"Set"display
appears.After about 3-4 seconds the transmitteremitsa dou-
blebeeptoconfirm that themodeltypehaschanged.
- If you wish to interrupt the process,release the 3-D hotkey after
theOK?query appearsonthe screen.
7.4 Servo reverse (REVR)
This function is used to reverse the
directionofrotationofanyservoorall
eight servos electronically.This means
that you do not need to take into
account the servos’direction of rota-
tion when installing them in the
model.
18

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
Youcansimplyinstalltheservosinthepositionwhich producesthe
most direct pushrod linkages, and later select the appropriate
direction of servo rotation.
Press the "S" or "H"
button to select the
desired channel; the
numberflashes.
Turn the 3-D hotkey left to switch it to "reverse" (R),and turn it to
the right to reset it to "normal" rotation (N) again.An arrow above
or below the servo channel number clearly indicates the set direc-
tionofrotation.
7.5 Servo centre offset (STRM)
Wheninstallingservosina model it is
always best to fit them in such a way
thattheservooutputarmisatneutral
when the transmitter trim is also at
centre.Sometimesthis isjustnotpos-
sible,andsometimesservosof adiffe-
rentmakemaynotcentreproperly,andthisfunctioncanbeusedto
set the servos of all eight functions exactly to the correct neutral
position.
Move to the Setup menu,and select
thedesiredservochannelwiththe "S"
or "H" buttons.Turn the 3-D hotkey to
adjust the neutral position of the
selected servo.
The adjustment range is -125% to +125%.
Holdthe3-D hotkey pressed infor 1secondto revert tothe default
value(0%).
Thescreenshots aboveshowa fewtypicalsettings.
Itisimportant thatthedeviationfromcentre
is not excessive,otherwise the servo travel
will be distinctly different for each side of
neutral.This function is not intended for cor-
recting deficiencies in a model’s control sur-
facelinkages.
For special applications the centre setting
can be offset by as much as 125%,in which
case the servo covers its full arc of travel,but
onlyinonedirection.
7.6 Servo travel adjustment (ATV)
This function provides the means to adjust
servo travel separately for each side of
centre.The range of adjustment is 0 to +/-
125% of the total servo travel, including
trim.
Thisissometimesnecessarywhereamecha-
nical restriction,e.g.the control system lin-
kage,prevents the servo moving over its full
travel.The servo travel can then be reduced
to suit the installation.The function affects
theselectedservochannel,and alsoreduces
all mixed functions involving that channel.Any change to the set-
ting also affects the trim travel proportionally,together with any
DualRatesettingsyou haveentered.
- Atthetopofthescreenasmallarrowundertherowofnumbers
indicatestheselectedchannel.
- Moveto theSetupmenuand press the "S"or"H" button to
select the desiredservochannel.
Any changes you make to the settings affect this servo channel
only.
In the example shown
here the system is set
up to change the servo
travel for the first chan-
nel (left aileron) of the model stored in memory number 10.The
arrow indicates the direction of travel which can currently be chan-
ged.You select the other side of centre by moving the associated
transmittercontrol.
In the case of the horizontal transmit-
ter controls the arrow indicates right
andleft.Withtheverticalcontrolfunc-
tions the arrow indicates up and
down.Press the "S" or "H" button to
select a differentchannel.
Rotate the 3-D hotkey to adjust the
travel as a percentage value from 0 to
125%,or from0to -125%.Thisprocess
must be carried out separately for
each side of centre for each function.
Holding the 3-D hotkey pressed in for
onesecondresets the valuetothe default setting(100%).
If you set a negative value (in this case
-20%) using the 3-D hotkey,the servo
runs in the same direction regardless
of the direction in which you move
the stick.This can be used to control
special working systems on certain
types ofmulti-functionmodel.
7.7Transmitter control travel (AFR)
Function for adjusting the travel of the transmitter control within
therange0…100%,separately for each side of centre.
In contrast to servo travel reduction
(described above),this function also
affects any associated mixer func-
tionswhichyou haveactivated.
A reduction in transmitter control
travel therefore affects the mixing
rate when two functions are mixed
onto one servo.
19
0-125%
left 0-125%
right
0-100%0-100%

OrderNumbers
F4090-F4091- F4092
F4095-F4096- F4097
This means that two different transmitter controls with different
mixervalues caninfluencea single servo.
A further application arises in conjunction with modern gyro
systems,whichtendto increase orreduceservotravels.
This can be corrected by setting an appropriate value for transmit-
ter control travel;the value you set affects the pirouette speed of a
modelhelicopter.
Another possible use for this function is to reduce the transmitter
control travel to 0%;this disables the transmitter control comple-
tely,and the channel can then be used for a mixer (V-mix) without
running the risk that an accidental movement of the transmitter
controlhasan unwanted effectonthemodel.
Theselectedchannelis indicatedby asmallarrowunderthe rowof
numbersatthetop of thescreen.
Adjustments affect all the mixed channels which are affected
by the transmitter control channel in question.
In the example shown
here any adjustment
made will affect the
transmitter control tra-
vel for the 1st channel;
this applies to model
number10.
The arrow indicates which direction can currently be programmed.
The side can be changed by moving the associated transmitter
control.
Inthecaseof the horizontaltransmit-
ter controls the arrow indicates right
and left. With the vertical control
functions the arrow indicates up and
down.Press the "S" or "H" button to
select a differentchannel.
Rotate the 3-D hotkey to adjust the
travel as a percentage value from 0 to
100%.
Holding the 3-D hotkey pressed in for
one second resets the value to the
defaultsetting(100%).
7.8 Dual Rates - switchable reduced travels (D/R)
TheDual Ratesfacilityallowsthepilot
to select different control travels
duringaflight simplybyoperatingan
external mixer switch.You can set up
thefunctionso thattheswitchselects
either larger or smaller travels when
youswitchDual Rates on.
If no switch is assigned,the D/R function can be used as a means of
settingpermanenttravelreduction whichaffects bothsides ofcen-
treequally.
In this case it affects the servo channel corresponding to the trans-
mitter control you select,and also all other functions which are
affected (through mixers) by the same transmitter control.
Other mixed signals which affect the same servo output are not
affected,in contrast tostandardservotravellimiting.
Theexternal mixer switchshould beconnected tosocket 4(see
illustration in Section 4.7).A single switch can control 1,2 or 3
functions.
This is achieved by setting up the switches in the PARA/DRSW
menu(see also"PARA"menu,Section 7.1.5).
The graph shows the characteristic curve of the different control tra-
vels.Notethat theresponseis linearinboth cases.When DualRatesis
selected,theservotravelat fullstick deflectionisonly 60%.
Thisoptionisavailableforthethreeprimarycontrolsurfacefunctions:
aileron,rudderand elevator.
The top part of the screen displays the functions to which travel
reduction can be applied.The arrow below the numbers indicates
whichfunctionis currentlyselected.
Press the "S" button to select the next
function. The flashing "%" symbol
shows that adjustment is possible;
rotatethe 3-Dhotkeyto setthe value.
Turningthe3-Dhotkeytotheleftredu-
ces the control travel;turning it to the
right increases the value. The screen
displaysthecontrol travel youhaveset
in the form of a percentage number
between0and100%.Youcanreturnto
the default setting (100%) by holding
the 3-D hotkey pressed in for about
twoseconds.
For reasons of safety you should never reduce the Dual Rates
value to 0%,as this would give you no control at all for that func-
tion.Werecommend20% asthesafe minimumvalue.
The exception to this rule is the case where you deliberately
assign no function to a particular transmitter control,should you
wish to use this channel to carry a self-generated mixer function
(V-MIX).
7.9Exponential function(EXP)
The"EXPO"functionaffectsthe charac-
teristic curve of the transmitter sticks,
i.e.the linear association between stick
travel and servo travel is changed to a
non-linear (exponential) curve. The
basicpurposeofEXPOistoprovidefine
control of the model around the neu-
tralposition.
The top part of the screen displays the
transmitter controls 1…4, for which
EXPOisavailable.
The arrow below "1" indicates that it is
currently possible to alter the setting
for transmitter control 1.The % symbol
flashes to show that the value can be
changed.
20
Transmittercontrol travel
Servo travel