Spektrum DX20 User manual

Instruction Manual/Bedienungsanleitung/
Manuel d’utilisation/ Manuale di Istruzioni/
Manual de instrucciones
®
20
20 ®

2
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
WARNING: Read the ENTIRE instruction manual to become familiar with the features of the product before operating.
Failure to operate the product correctly can result in damage to the product, personal property and cause serious injury.
This is a sophisticated hobby product. It must be operated with caution and common sense and requires some basic mechanical ability.
Failure to operate this product in a safe and responsible manner could result in injury or damage to the product or other property. This
product is not intended for use by children without direct adult supervision. Do not attempt disassembly, use with incompatible compo-
nents or augment product in any way without the approval of Horizon Hobby, LLC. This manual contains instructions for safety, operation
and maintenance. It is essential to read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in
order to operate correctly and avoid damage or serious injury.
WARNING AGAINST COUNTERFEIT PRODUCTS
Always purchase from a Horizon Hobby, LLC authorized dealer to ensure authentic high-quality Spektrum product. Horizon Hobby,
LLC disclaims all support and warranty with regards, but not limited to, compatibility and performance of counterfeit products or products
claiming compatibility with DSM or Spektrum technology.
NOTICE: This product is only intended for use with unmanned, hobby-grade, remote-controlled vehicles and aircraft. Horizon Hobby, LLC
disclaims all liability outside of the intended purpose and will not provide warranty service related thereto.
Age Recommendation: Not for Children under 14 years. This is not a toy.
Warranty Registration
Visit spektrumrc.com today to register your product.
NOTICE: While DSMX technology allows you to use more than 40 transmitters simultaneously, do not use more than 40 transmitters
simultaneously with DSM2 components.
General Notes
• Modelsarehazardouswhenoperatedandmaintainedincorrectly.
• Alwaysinstallandoperatearadiocontrolsystemcorrectly.
• Alwayspilotamodelsothemodeliskeptundercontrolinall
conditions.
• Pleaseseekhelpfromanexperiencedpilotoryourlocal
hobby store.
• Contactlocalorregionalmodelingorganizationsforguidance
and instructions about flying in your area.
•Always power on the transmitter first and power off the
transmitter last when working with a model.
• Afteramodelisboundtoatransmitterandthemodelisset
up in the transmitter, always bind the model to the transmitter
again to establish failsafe settings.
Pilot Safety
• Alwaysmakesureallbatteriesarefullychargedbeforeying.
• Timeightssoyoucanysafelywithinthetimeallottedby
your battery.
•Always perform a range check of the transmitter and the
model before flying the model.
• Alwaysmakesureallcontrolsurfacescorrectlyrespondto
transmitter controls before flying.
• Neveryamodelnearspectators,parkingareasorany
other area that could result in injury to people or damage to
property.
• Neveryduringadverseweatherconditions.Poorvisibility,
wind, moisture and ice can cause pilot disorientation and/or
loss of control of a model.
• Whenayingmodeldoesnotrespondcorrectlytocontrols,
land the model and correct the cause of the problem.
NOTICE
All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon Hobby, LLC. For up-to-date
product literature, visit horizonhobby.com and click on the support tab for this product.
Meaning of Special Language
The following terms are used throughout the product literature to indicate various levels of potential harm when operating this product:
NOTICE:Procedures,whichifnotproperlyfollowed,createapossibilityofphysicalpropertydamageANDlittleornopossibilityofinjury.
CAUTION:Procedures,whichifnotproperlyfollowed,createtheprobabilityofphysicalpropertydamageANDapossibilityofseriousinjury.
WARNING:Procedures,whichifnotproperlyfollowed,createtheprobabilityofpropertydamage,collateraldamageandseriousinjury
OR create a high probability of superficial injury.

3
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
• DX20 Transmitter
• 4000mAhLiPoTransmitterPack(Installedintransmitter)
• GlobalPowerSupply
• Manual
• DX20 Neck Strap
• DX20 Decal Sheet
BEFORE USING YOUR TRANSMITTER:
Before using your new transmitter, visit the Spektrum Community website at spektrumrc.com to register your transmitter
and download the latest AirWare™ firmware updates. A registration reminder screen occasionally appears until you
register your transmitter. The reminder screen will not appear after you register your transmitter.
Support Videos:
For helpful videos on programing the Spektrum DX20 and other AirWare equiped Spektrum Transmitters go to
https://www.spektrumrc.com/
BOX CONTENTS
DX20 FEATURES
• Assign five Airplane flight modes to any combination of up to two switches
• Multi-Engine support
• Multi-Rotor Airware
• ProTrimfeaturetonetunerates,expos,differential,andmixesinight
• “Roll” to telemetry screens without entering the Settings menu
• Selectable sound menu lets you activate or inhibit specific DX20 sounds
• Switch between Function List and System Settings menus without powering off the transmitter
• VirtuallyUnlimitedModelMemory(250models)
• Voice alerts for telemetry, warnings, and other conditions
• Wireless trainer

4
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
TABLE OF CONTENTS
Battery and Charging Precautions and Warnings ..........................5
Charging Your Transmitter...............................................................5
Transmitter Functions......................................................................6
Main Screen .....................................................................................8
Navigation ........................................................................................8
Auto Switch Select.............................................................................8
SD Card.............................................................................................9
Installing the SD Card.........................................................................9
Update AirWare™ Software..............................................................10
Binding ...........................................................................................11
Programming Failsafe Positions....................................................12
SmartSafe™ Failsafe.......................................................................12
Hold Last Command.........................................................................12
PresetFailsafe.................................................................................12
Model Type Programming Guide ...................................................15
System Setup .................................................................................16
Model Select ...................................................................................16
Model Type......................................................................................16
Model Name....................................................................................17
F-Mode Setup..................................................................................17
Spoken Flight Mode Setup................................................................19
Channel Assignment ........................................................................19
Channel Input Configuration..............................................................19
Model Utilities ................................................................................21
Create New Model ...........................................................................21
Delete Model...................................................................................21
Copy Model .....................................................................................21
Model Reset ....................................................................................22
Sort Model List ................................................................................22
Warnings.........................................................................................22
Telemetry ........................................................................................23
Telemetry Settings ...........................................................................23
Telemetry Auto-Configuration............................................................23
AS3XGainLiveView(ACROandSAILTypesOnly)..............................23
Telemetry Alarms .............................................................................24
PreightSetup................................................................................24
Frame Rate .....................................................................................24
Bind................................................................................................25
TRAINER..........................................................................................25
Wired Trainer...................................................................................25
Wireless Trainer ...............................................................................26
TrainerFPVMode ............................................................................27
Analog Switch Setup........................................................................27
Digital Switch Setup.........................................................................27
System Setup ..................................................................................28
Center Tone.....................................................................................28
Sound Utilities..................................................................................28
SYSTEM SETTINGS .........................................................................28
User Name ......................................................................................28
Contrast ..........................................................................................28
System Setup ..................................................................................29
Backlight.........................................................................................29
Mode ..............................................................................................29
Battery Alarm...................................................................................29
Selecting a Language.......................................................................29
Inactive Alarm..................................................................................29
ExtraSettings ..................................................................................30
System Setup ..................................................................................31
Serial Number .................................................................................31
ExportingtheSerialNumbertotheSDCard.......................................31
Locating the Transmitter AirWare Software Version.............................31
Calibrate .........................................................................................31
Transfer SD card.............................................................................32
Import Model...................................................................................32
ExportModel ...................................................................................32
Updating Spektrum DX20 Sound Files...............................................33
Update AirWare Software..................................................................33
ScreenPrint ....................................................................................33
Function List...................................................................................34
Servo Setup.....................................................................................34
Travel Adjust....................................................................................34
Sub-Trim.........................................................................................34
Reverse...........................................................................................35
Speed .............................................................................................35
Absolute(Abs.)Travel.......................................................................35
Balance...........................................................................................35
D/R&Exponential............................................................................36
Differential(ACROandSAILTypesonly).............................................36
Throttle Cut .....................................................................................36
Throttle Curve..................................................................................36
Mixing.............................................................................................38
Offset..............................................................................................38
Trim ................................................................................................38
AssigningaMixtoaSwitch..............................................................38
ComboMixing .................................................................................39
BackMixing.....................................................................................39
1/2MixingValues ............................................................................39
OriginMixing ...................................................................................39
Sequencer.......................................................................................40
ProTrim ...........................................................................................41
Range Test ......................................................................................41
Timer ..............................................................................................41
Timer Event and Timer Control Alerts.................................................42
Telemetry ........................................................................................42
Custom Voice Setup.........................................................................42
System Setup ..................................................................................43
Monitor ...........................................................................................43
X-PlusMonitor.................................................................................43
ACRO (Airplane)..............................................................................45
Elevon Servo Control ........................................................................45
Aileron ............................................................................................45
Elevator...........................................................................................45
Flap System.....................................................................................45
ACROMixing ...................................................................................45
Acro Gyro Function ..........................................................................46
PitchCurveFunction........................................................................46
Multi-Engine Control ........................................................................47
Acro Image......................................................................................47
HELI (Helicopter) ............................................................................48
Swash Type .....................................................................................48
Collective Type.................................................................................48
PitchCurve......................................................................................48
Swashplate......................................................................................49
Gyro................................................................................................49
Tail Curve .......................................................................................49
Mixing............................................................................................49
SAIL (SAILPLANE)...........................................................................50
Tail..................................................................................................50
Motor..............................................................................................50
CamberPreset................................................................................50
Camber System...............................................................................50
SAILMixing .....................................................................................51
V-Tail Differential .............................................................................51
MULTI (Multirotor) ..........................................................................52
F-Mode Setup..................................................................................52
Trim Setup.......................................................................................52
D/R&Exponential............................................................................53
Motor Cut........................................................................................53
Motor Curve ...................................................................................53
Physical Transmitter Adjustments ................................................54
ProgrammingConversion .................................................................54
Changing the Throttle Ratchet...........................................................54
Adjusting the Gimbal Centering Screw...............................................54
Throttle limiting screws ....................................................................54
Calibration.......................................................................................54
Ratcheted Throttle............................................................................55
Control Stick Length Adjustment ......................................................55
Troubleshooting Guide ...................................................................56
1-Year Limited Warranty................................................................57
Warranty and Service Contact Information...................................58
IC Information ................................................................................58
Compliance Information for the European Union .........................59

5
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Failuretoexercisecautionwhileusingthisproductandcomplywiththefollowingwarningscouldresultinproductmalfunction,electrical
issues,excessiveheat,FIRE,andultimatelyinjuryandpropertydamage.
• Read all safety precautions and literature prior to use of this product
• Never allow minors to charge battery packs
• Never drop charger or batteries
• Never attempt to charge damaged batteries
• Never attempt to charge a battery pack containing different types of batteries
• Never charge a battery if the cable has been pinched or shorted
• Never allow batteries or battery packs to come into contact with moisture at any time
• Neverchargebatteriesinextremelyhotorcoldplaces(recommendedbetween50–80˚For10–27˚C)orplaceindirectsunlight
• Always disconnect the battery after charging, and let the charger cool between charges
• Always inspect a new battery before charging
• Always terminate all processes and contact Horizon Hobby if the product malfunctions
• Alwayskeepbatteriesandchargerawayfromanymaterialthatcouldbeaffectedbyheat(suchasceramicandtile),astheycan
get hot
• Alwaysendthechargingprocessifthechargerorbatterybecomeshottothetouchorstartstochangeform(swell)duringthe
charge process
CHARGING YOUR TRANSMITTER
BATTERY AND CHARGING PRECAUTIONS AND WARNINGS
The DX20 has an internal charger designed to charge the included
2-cellLiPobatteryatachargerateof200mAh.The charge port on
the back of the transmitter is not polarity-dependent.
NOTICE:Neverconnectanexternalbatterychargertoyour
DX20transmitter.IfyouwishtochargetheLiPobatteryusinga
LiPocharger,youmustremovethebatteryfromthetransmitter
before charging.
The first time you charge the transmitter battery, the charge time
may be 15-20hours. Always charge the transmitter on a heat-
resistant surface.
1.Poweroffyourtransmitter.
2. Connect the power supply connector to the transmitter charge
port.
3. Connect the power supply to a power outlet using the
appropriate adapter.
4. The blue LED on the front of the transmitter turns on during
charging and turns off when the battery is fully charged.
5.Disconnectthetransmitterfromthepowersupplyonce
charging is complete and disconnect the power supply from
the power outlet.
CAUTION: Never leave a charging battery unattended.
LED indicators
The blue LED indicates the transmitter battery is charging. The
orange LED indicates the transmitter is powered on and there is
radio transmission.
Battery Alarm
The System Settings Screen allows you to change the battery
type and low alarm settings. See “System Settings” for more
information.
• An alarm will sound when the battery reaches the low voltage
limit(4.3VforNiMH,6.4VforLiPo).
CAUTION: NeverchangethelowvoltagelimitforLiPo
batteries from 6.4V. Doing so could over-discharge the
battery and damage both battery and transmitter.

6
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Function
1Elevator Trim (Mode 2, 4)
Throttle Trim (Mode 1, 3)
2Right Trim
3Switch E
4Switch G
5Switch F
6
Throttle Spring Tension
Adjustment (Mode 1,3)
Throttle Ratchet
Adjustment (Mode 1,3)
7Throttle limiter (Mode 1, 3)
8Up/Down Gimbal Stick Tension
Adjustment
9
Throttle/Aileron Stick (Mode 1)
Elevator/Aileron Stick (Mode 2)
Throttle/Rudder Stick (Mode 3)
Elevator/Rudder Stick (Mode 4)
10 Gimbal Centering Screw
Function
11 Left/Right Gimbal Stick Tension
Adjustment
12 Aileron Trim (Mode 1,2)
Rudder Trim (Mode 3,4)
13 Scroll wheel
14 LED
15 On/Off Switch
16 LCD
17 Neck Strap Mount
18 Back Button
19 Clear Button
20 Rudder Trim (Mode 1,2)
Aileron Trim (Mode 3,4)
21 Adjustment (Mode 2,4)
Adjustment (Mode 2,4)
Function
22 Throttle limiter (Mode 2, 4)
23 Up/down Gimbal Stick Tension
Adjustment
24
Elevator/Rudder Stick (Mode 1)
Throttle/Rudder Stick (Mode 2)
Elevator/Aileron Stick (Mode 3)
Throttle/Aileron Stick (Mode 4)
25 Gimbal Centering Screw
26 Left/Right Gimbal Stick Tension
Adjustment
27 Switch C
28 Switch B
29 Switch D
30 Left Trim
31 Elevator Trim (Mode 1,3)
Throttle Trim (Mode 2,4)
32 Speaker Grill
TRANSMITTER FUNCTIONS
1
2
4
3
5
6
7
8
9
10
11
12
13
14151617
18
19
20
21
22
23
24
25
27
28
29
30
31
32
26

7
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
The transmitter comes with a thin, clear
plastic film applied to some front panels for
protection during shipping. Humidity and use
may cause this film to come off. Carefully
remove this film as desired.
Function
33 Antenna
34 Handle / Antenna
35 Bind/Switch I
36 Switch A
37 Left Lever
Function
38 Battery Cover
39 TrainerPort
40 ChargePort
41 Audio Jack
42 Right Lever
Function
43 Switch H
44 R Knob
45 SD Card Slot
TRANSMITTER FUNCTIONS
33
34
35
36
37
38
39
40
41
42
43
44
45

8
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
• Scroll the scroll wheel to move through the screen content or
changeprogrammingvalues.Pressthescrollwheeltomake
a selection.
• Use the Back button to go to the previous screen
(forexample,togofromtheMixingScreentotheFunction
List).
• Use the Clear button to return a selected value on a screen to
the default setting.
• Direct Model Access enables you to access the Model Select
screen without powering off the transmitter. Anytime the
transmitter power is on, press the Clear and Back buttons to
access the Model Select screen.
• Pressandholdthescrollwheelwhilepoweringonthe
transmitter to show the System Setup list. No radio
transmission occurs when a System Setup screen is
displayed, preventing accidental damage to linkages and
servos during changes to programming.
• At the main screen you can scroll to view the servo monitor.
• The Main Screen appears when you power on the transmitter.
PressthescrollwheeloncetodisplaytheFunctionList.
• When you want to change a value in a screen for a particular
control position, move the control to the desired position to
highlight the value you want to change, such as 0/1/2, up/
down or left/right.
Turn
Press
Press
Enter, Choose
or Exit
Move between
options or change
value in an option
Hold for 3
seconds and
release to move to
the Main Screen
Scroll HoldPress
Tip: The tick mark below shows the current switch position.
Rollingandclickingthescrollwheelturnstheselectedboxblack,
indicating that the value or condition will act on that position.
Function
AModel Name
DSMX/DSM2 If not shown, this indicates not bound
Displays throttle position
DDisplays the Volume Level when the BACK button is pressed
EDigital Battery Voltage (an alarm sounds and the screen flashes
when battery charge gets down to 6.4V for a LiPo/Li Ion battery.)
FModel Type
GElevator Trim (Modes 2 and 4)
Throttle Trim (Modes 1 and 3)
HAileron Trim (Modes 1 and 2)
Rudder Trim (Modes 3 and 4)
IModel Memory Timer
Function
JRudder Trim (Modes 1 and 2)
Aileron Trim (Modes 3 and 4)
KThrottle Trim (Mode 2 and 4)
Elevator Trim (Mode 1 and 3)
LTimer
MAIN SCREEN
NAVIGATION
Auto Switch Select
Toeasilyselectaswitchinafunction,suchasaprogrammix,
rollwiththescrollwheeltohighlighttheswitchselectionbox,and
pressthescrollwheel.Theboxaroundtheswitchshouldnow
flash. To select a switch, toggle the switch you wish to select.
Verify the switch selection is now displayed as desired. When
correct, press the scroll wheel to select this switch and complete
the switch selection.
F
E
B C
K
L
A
G
HJ I
B
C
D

9
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Installing the SD Card
The SD Card (not included) enables you to:
• Import(copy)modelsfromanycompatible*Spektrum
AirWare™ transmitter
• Export(transfer)modelstoanySpektrum
AirWaretransmitter*
• Update AirWare software in the transmitter
• Install/Update sound files
To install the SD Card:
1.Poweroffthetransmitter.
2. Remove the battery door.
3.PresstheSDCardintothecardslotwiththecardlabelfacing
up as shown.
Registering the Transmitter with Spektrum
ExportingthetransmitterserialnumbertotheSDCardallowsyou
to upload the serial number directly into the registration screen at
www.spektrumrc.com.
To export the serial number:
1.Pressandholdthescrollwheelwhilepoweringthe
transmitter on until the System Setup list appears.
2.ScrolltotheSystemSettingsmenu.Pressthescrollwheel
once to open the menu.
3. Select NEXTontheSystemSettingsandExtraSettings
screens.
4. When the Serial Number screen appears, select EXPORT.
5.PoweroffthetransmitterandremovetheSDCardfromthe
transmitter.
To Upload the serial number to www.spektrumrc.com:
1. Insert the SD Card in your computer and check the contents of
theSDcardonyourcomputerfora“My_DX20.xml”le.
2. In your favorite browser navigate to www.spektrumrc.com and
ndtheProductRegistrationlinkonthetopofthepageas
shown.
3. If you do not already have an account, create one now. If you
have an account login in with your secure login.
4. Once logged in go to the “My Spektrum” page. Fill out all
relevant information. Once you select your transmitter model
from the pull down menu you will be asked to upload the serial
number.
5.ClickontheSelectbuttontonavigatetothe“My_DX20.xml”
file on the SD card that is in your computers SD card reader
and select the file.
6. Click on the Upload from xml file... button and the serial
number will populate into the Serial Number fields.
7. Click REGISTER at the bottom of the screen to finish registering
your new Spektrum Transmitter.
Alternatelyyoucancopytheserialnumberfromthe.xmlle
and paste directly into the Serial Number field.
SD CARD
*DX20,DX18SE,DX18G2,DX18G1,DX18QQ,DX9Black,DX9,DX18t,DX10t,DX7G2andDX6G2
Screen shots from www.spektrumrc.com are correct at time of
printing but may change at a future date.

10
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
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SD CARD
Update AirWare™ Software
NOTICE: The orange LED Spektrum bars flash and a status
bar appears on the screen when AirWare software updates are
installing. Never power off the transmitter when updates are
installing. Doing so may damage the system files.
NOTICE: BeforeinstallinganyAirWareles,alwaysExportAll
Models to an SD Card separate from the SD Card containing the
update. The update may erase all model files.
For more information on AirWare software updates, visit
www.spektrumrc.com
Automatically Installing AirWare Software Updates
1. In your favorite browser navigate to www.spektrumrc.com and
find the Firmware Updates link inside the Setups/Updates tab on
the top of the page as shown.
2.ndyourregisteredtransmitterintheMYPRODUCTSlistand
click on Download Updates. Follow directions on the screen for
downloading the update to your computer and SD card.
3. Eject SD card from the computer.
4. Make sure the transmitter is powered off and install the SD card
into the transmitter.
5.Poweronthetransmitterandtheupdateautomaticallyinstallsin
the transmitter.
Manually Installing AirWare Software Updates
1. Save the desired AirWare version to the SD Card.
2. Install the SD card into the transmitter.
3. Select Update Firmware in the SD Card Menu options. The
Select File screen appears.
4. Select the desired AirWare version from the File List. When
updates are installing, the transmitter screen is dark. The
orange LED Spektrum bars flash and the update status bar
appears on the screen.
NOTICE: Do not power off the transmitter when updates are
installing. Doing so will damage the transmitter.
Screen shots from www.spektrumrc.com are correct at time of
printing but may change at a future date.

11
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
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BINDING
BindingistheprocessofprogrammingthereceivertorecognizetheGUID(GloballyUniqueIdentier)codeofasinglespecictransmitter.
You must bind the receiver to your transmitter before it will operate.
Binding Using the Receiver and Receiver Battery
Binding Using the Receiver and ESC
1. Lower throttle to the lowest position and make sure the
transmitter is powered off.
2. Insert the bind plug into the BIND/DATA port.
3. Insert the receiver battery into ANY open port. The receiver’s
LED will flash when the receiver is ready to bind.
4. While pressing the Bind button, power on the transmitter.
5.ReleasetheBindbuttonafterthereceiverhasstopped
flashing rapidly, once the receiver’s LED stays illuminated;
this indicates the receiver is bound to the transmitter. The
transmitter screen also provides binding information.
6. Remove the bind plug from the receiver.
1. Lower the throttle to the lowest position and make sure the
transmitter is powered off.
2. Insert the bind plug into the BIND/DATA port.
3. Insert the ESC plug into the THRO port.
4. Connect the battery to ESC and turn on the ESC switch,
if available. The receiver’s LED will flash rapidly when the
receiver is ready to bind.
5.WhilepressingtheBindbutton,poweronthetransmitter.
6. Release the Bind button after the receiver’s LED stays illumi-
nated. This indicates the receiver is bound to the transmitter.
The transmitter screen also provides binding information.
7. Remove the bind plug from the receiver.
1
1
4
5
2
2
5
6
3
3 4
6
7

12
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
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You establish failsafe positions when you bind your transmitter and
receiver. If the radio signal connection is lost between the transmitter
and receiver, the receiver immediately moves the aircraft control
surfaces to the failsafe positions. If you assign the receiver THRO
channel to a transmitter channel other than throttle, we recommend
usingPresetfailsafewiththethrottleinthelowposition.
Some receivers do not support Failsafe on throttle set to channels
other than the throttle channel. These receivers will hold last
command.
NOTICE: Failsafe features vary according to receiver. Always consult
the receiver instruction manual for failsafe features.
Before flight, ALWAYS confirm the failsafe functions as you would
expect.
SmartSafe™ Failsafe
SmartSafe failsafe is a technology that only acts on the throttle channel
and offers the following benefits:
• Preventselectricmotorsfromoperatingwhenthereceiverpower
is on and the transmitter power is off.
• Preventsthespeedcontrollerfromarminguntilthethrottleis
moved to the low throttle position.
• Powersoffanelectricmotorandreducesgas/glowenginestoidle
if signal is lost.
To Program SmartSafe:
Move the throttle to the low or off position before putting the
transmitter into bind mode.
To Test the SmartSafe failsafe
1.Powerthetransmitterandreceiveron.
2.Poweroffthetransmitter.Thethrottleshouldimmediatelymove
to the failsafe position.
CAUTION: Make sure the aircraft is fully restrained on the
ground. If the failsafe is not set correctly, your aircraft might
advance to mid or full throttle.
Hold Last Command
The Hold Last Command failsafe maintains the last command on all
channelsexceptthrottle.Iftheradiosignalislost,theaircraftmaintains
the commanded control inputs until the receiver regains signal.
To program Hold Last Command, follow the provided binding
instructions in this instruction manual.
To Test Hold Last Command:
1.Poweronthetransmitterandreceiver.
2. Move one of the control sticks to the desired Hold Last
Command position and hold the input.
3.Whileholdingthecontrolinput(forexample,asmallamountof
rudder)poweroffthetransmitter.Theruddershouldmaintain
the input command.
CAUTION: Make sure the aircraft is fully restrained on the
ground. If the failsafe is not set correctly, the aircraft throttle
might advance to mid or full throttle.
Preset Failsafe
ThePresetfailsafemovesallchannelstotheirprogrammedfailsafe
positions.
WerecommendusingPresetfailsafetodeployspoilersonsailplanes
to prevent a flyaway if the radio signal is lost.
To program Preset failsafe:
1. Insert the bind plug in the bind port on the receiver and power
on the receiver.
2. Remove the bind plug when the orange LED on the main
receiver and all attached remote receivers flash rapidly. The
orange receiver LEDs will continue flashing.
3. Move the transmitter control sticks and switches to the desired
Presetfailsafeposition.Powerthetransmitteron.
4. Failsafe programming is complete when the orange LEDs on
the transmitter and all receivers turn solid.
CAUTION: Make sure the aircraft is fully restrained on the
ground. If the failsafe is not set correctly, the aircraft throttle
might advance to mid or full throttle.
PROGRAMMING FAILSAFE POSITIONS
IMPORTANT: NotallreceiverssupportPresetFailsafe.Consultyour
receiver manual for more information.

13
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
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Installation
Ingasandglowaircraft,installtheX-Plus8modulebywrappingit
in protective foam and fastening it in place using rubber bands or a
hook and loop strap. In electric airplanes or helicopters, you can use
thick double-sided foam tape to fasten the module in place.
WhenusinganX-Plusreceiverandmodule,itisrecommendedthat
theX-Plus8modulebemountedasneartothereceiveraspossible.
When using the jumper lead to power the module, mounting the
X-Plus8modulenearthereceiversystemwillminimizethecurrent
lossfromthereceiver.Servoextensionscanbeusedwitheach
servo, but we recommend using heavy 22 gauge wire with gold-
plated connectors.
ApowerjumperplugmustbeinstalledinoneoftheBATT/JMPR
ports of the module if the module is powered from the receiver
through the SRXL port.
Alwaysremovethepowerjumperwhenanauxiliarybatteryorauxil-
iarybatteriesareused.Whentheauxiliarybatteryoptionisused,the
X-Plus8modulecanbemountedasfarawayfromthereceiveras
needed to be near connected servos.
Power System Requirements
Inadequate power systems that do not provide the necessary mini-
mum voltage to the receiver during flight are the number one cause
of in-flight failures. Some of the power system components that
affect the ability to properly deliver adequate power include:
• Receiverbatterypack(numberofcells,capacity,celltype,state
ofcharge)
• The ESC’s capability to deliver current to the receiver in electric
aircraft
• The switch harness, battery leads, servo leads, regulators, etc.
TheX-Plus8modulehasaminimumoperationalvoltageof3.5
volts; it is highly recommended that the power system be tested per
the guidelines.
Recommended Power System Test Guidelines
Ifaquestionablepowersystemisbeingused(e.g.,asmallorold
battery, an ESC that may not have a BEC that will support high-
currentdraw,etc.),performthefollowingtestwithavoltmeter.
The Hangar 9®DigitalServo&RxCurrentMeter(HAN172)orthe
SpektrumFlightLog(SPM9540)workwellforthistest.
Plugthevoltmeterintoanopenchannelportinthereceiverand,with
thesystemon,loadthecontrolsurfaces(applypressurewithyour
hand)whilemonitoringthevoltageatthereceiver.Thevoltageshould
remain above 4.8 volts even when all servos are heavily loaded.
CAUTION: When charging Ni-MH batteries, make sure the
battery fully charges. Ni-MH batteries charged with peak
detectionfastchargershaveatendencytofalsepeak(i.e.notfully
charge),whichcouldleadtoacrash.
TheX-Plus™8moduleisdesignedtoallowexpansionofupto
8 servos for non-control surface functions such as bomb drops,
lights, winches, retractable landing gear, and many more. The
X-Plus8iscompatiblewithSpektrum™X-Plustransmittersand
receivers.TheX-Plus8moduleofferstheoptiontopowerthe
connectedservosviadualauxiliarybatteryportswithseparate
batteriesandswitchharnesses(soldseparately)independentof
thereceiver.TheX-Plus8modulecanalsobepoweredinclusive
of the receiver by using the included jumper through either of the
dualBATT/JMPRports.
Features:
• 8-channelexpansion
• Dual battery ports
• Included Jumper offers option of using receiver power
• Allowsnetuningof8servosonnon-criticalcontrols(bomb
drops,lights,winches,gear,etc.)
Applications
Scalemodelerswithcomplexaircraft,ships,orsurfaceapplica-
tionswillenjoytheeasyprogrammingandfunctionsoftheX-Plus
8moduleusingX-Pluscompatibletransmitter’sAirWare™
software. Modelers will be able to select 2 position,
3 position or potentiometer adjustment through their transmitter.
After selecting the specific switch or port, AirWare software will al-
lowtheindividualservoadjustmentofeachX-Pluschannel‘stravel
adjust, sub trim, reversing, and speed.
Specifications
Type:X-PlusModule
Channels: 8
Dimensions:0.91x1.61x0.79in
(23x41x20mm)
Weight:.42oz(11.9g)
VoltageRange:3.5to9.6V
Resolution:512
Compatibility:AllX-Plustransmittersandreceivers
X+1
X+5
X+6
X+2
X+3
X+4
X+7
X+8
BATT/JMPR
BATT/JMPR
SRXL
X+6 Servo
ToSRXLPort
AuxiliaryBattery
Pack
(optional) Jumper
On/OffSwitchHarness(optional)
X+5Servo X+4 Servo X+3 Servo X+2 Servo X+1 Servo
X+8 Servo X+9 Servo
X-PLUS™ MODULE
CAUTION:OnlyusetheincludedJumperswiththeX-Plus
8module.DonotuseBindPlugsfortheJumpers.

14
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
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X-Plus Channels and Failsafe
FailsafeisnotsupportedforservosconnectedtotheX-Plus
Module. Nofailsafeshouldbeexpectedorattemptedforaservo
connectedthroughtheX-PlusModule. However, servos connected
totheX-PlusModulewillholdlastcommandintheeventofa
failsafe condition.
ToActivateX-Plus
1. Open the Frame Rate Menu in System Setup.
2.ScrolltoX-Plusandpressthescrollwheeltoactivate.TheX-
PlusInputsscreenisnowactiveintheChannelAssignmenu.
Ifyouselect11msframeratebeforeyouactivateX-Plus,the
transmitterrevertsto22msframeratewhenX-Plusisactive.
CAUTION: Do NOT connect throttle or any primary
controlsurfacetotheX-PlusModule.TheX-Pluschan-
nelsareintendedtobeusedforauxiliaryfunctionsonly.X-Plus
channelshavearesolutionof512andvariablelatencyfrom
22mstoabout88ms.WhenX-Plusisactive,therst10chan-
nels default to 22ms.
Refer to community.spektrumrc.com for more information
aboutX-Plusoptions.
from Channel Assign menu
X-PLUS

15
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
MODEL TYPE PROGRAMMING GUIDE
Menu options show up on model type selection. These menu options vary between Model Types (Airplane,Helicopter,Sailplaneand
Multirotor),butareidenticalforallmodelsinthattype.Subsequentaircrafttype(Aircraft, Swashplate,Sailplane or Multirotor)selectionsmake
other menu options appear.
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Throttle Curve
Gyro1
Gyro2
Gyro3
Pitch Curve
Flap System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Swashplate Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Swashplate
Gyro
Governor
Tail Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Sailplane Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Motor Curve
Camber Presets
Camber System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Camera Gimbal
Motor Cut
Motor Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Throttle Curve
Gyro1
Gyro2
Gyro3
Pitch Curve
Flap System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Swashplate Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Swashplate
Gyro
Governor
Tail Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Sailplane Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Motor Curve
Camber Presets
Camber System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Camera Gimbal
Motor Cut
Motor Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Throttle Curve
Gyro1
Gyro2
Gyro3
Pitch Curve
Flap System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Swashplate Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Swashplate
Gyro
Governor
Tail Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Sailplane Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Motor Curve
Camber Presets
Camber System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Camera Gimbal
Motor Cut
Motor Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Throttle Curve
Gyro1
Gyro2
Gyro3
Pitch Curve
Flap System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Swashplate Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Swashplate
Gyro
Governor
Tail Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Sailplane Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Differential
V-Tail Differential
Throttle Cut
Motor Curve
Camber Presets
Camber System
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor
System Setup List:
Model Select
Model Type
Model Name
Aircraft Type
F-Mode Setup
Spoken Flight Mode
Channel Assign
Trim Setup
Model Utilities
Warnings
Telemetry
Preflight Setup
Frame Rate
Bind
Trainer
Analog Switch Setup
System Settings
Model Utilities
Transfer SD Card
Function List:
Servo Setup
D/R and Expo
Throttle Cut
Throttle Curve
Pitch Curve
Camera Gimbal
Motor Cut
Motor Curve
Mixing
Sequencer
ProTrim
Range Test
Timer
Telemetry
Custom Voice Setup
System Setup
Monitor
XPlus Monitor

16
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Select from Airplane, Helicopter, Sailplane or Multicopter
model types.
IMPORTANT: When you select a new model type, you will delete
any programming data in the current model memory. Always
confirm the desired model memory before changing model types.
It will be necessary to re-bind after resetting the model type.
To change the model type:
1. Scroll to the desired model type and press the scroll wheel.
The Confirm Model Type screen appears.
2. Select Yes and press the scroll wheel to confirm the model
type.Alldatawillbereset.SelectingNowillexittheConrm
Model Type screen and return to the Model Type screen.
PressandholdthescrollwheelwhilepoweringonthetransmittertoshowtheSystemSetuplist.Noradiotransmissionoccurswhena
System Setup screen is displayed, preventing accidental damage to linkages and servos during changes to programming.
You can also enter the System Setup from the Function list without turning the transmitter off. A Caution screen will appear that warns that
RFwillbedisabled(thetransmitterwillnolongertransmit).PressYES if you are sure and want to access the System List. If you are not
sure, press NOtoexittothemainscreenandcontinueoperation.
If you do not press YES or NO,thesystemwillexittothemainscreenandcontinueoperationwithinapproximately10seconds.
WARNING: Do not press YES unless the model is turned
off or the model is secured.
ModelSelectenablesyoutoaccessanyofthe250internalmodel
memory locations in the Model Select list.
1. Scroll to the desired model memory in the Model Select list.
2. When the desired model memory is highlighted, press the
scroll wheel once to select the model. The transmitter returns
to the System Setup List.
3. Add a new model by rolling to the bottom of the list. You will
then be prompted with the Create New Model screen, with
the option to create a new model or cancel. If you select
Cancel, the system will return to the Model Select function. If
you select Create, the new model will be created and now be
available in the model select list.
Direct Model Access
PresstheClearandBackbuttonsfromtheMainScreenora
telemetry screen to access Model Select.
SYSTEM SETUP
Model Select
Model Type

17
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Flight Mode Wizard
The Flight Mode Wizard resets the Flight Mode Table to the default
settings without affecting the flight mode switch assignments.
To reset the Flight Mode Table:
1.SelectPREVIOUSuntilyoureachtheFlightModeWizard.
2. Select the desired option, based on the number of active flight
modes. The Flight Mode Table is now reset.
Aircraft Flight Mode Setup
Youcanassignupto5ightmodesusinganycombinationofup
to two switches. You can also assign a priority switch. When the
priority switch position is active, only the current flight mode is
active, regardless of other switch positions.
Model Name enables you to assign a custom name to the current
model memory. Model names can include up to 20 characters,
including spaces.
To add letters to a Model Name:
1. Scroll to the desired letter position and press the scroll wheel
once.Aashingboxappears.
2.Scrollleftorrightuntilthedesiredcharacterappears.Press
the scroll wheel once to save the character.
3.Scrolltothenextdesiredletterposition.RepeatSteps1and
2 until the Model Name is complete. Insert a character by
selecting <+> or delete a character by selecting <->.
4. Select BACK to return to the System Setup list.
To erase a character:
1.PressCLEAR while the character is selected.
2.PressCLEAR a second time to erase all characters to the right
of the cursor.
Aircraft Type This menu only available in Airplane Mode. See ACRO(Airplane)sectionforsetup.
Sailplane Type This menu only available in Sailplane Mode. See SAIL(Sailplane)sectionforsetup.
Swash Type This menu only available in Helicopter Mode. See HELI(Helicopter)sectionforsetup.
Aircraft Options This menu only available in Multirotor Mode. See MULTI(Multirotor)sectionforsetup.
SYSTEM SETUP
Model Name
F-Mode Setup
Mode Number of Switches Number of Flight Modes
ACRO 2 5
HELI 3 (including Throttle Hold) 5(including Throttle Hold)
SAIL 3 10
MULTI 2 5
Use the Flight Mode Setup menu to assign switches to flight
modes. You can assign up to ten flight modes using any
combination of up to three switches depending on model type.

18
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Youcanassigntheavailableightmodes(upto5forAir,upto10
forSail)toeachoftheswitchpositions(upto3switchescanbe
usedforsailplaneandupto2switchescanbeusedforaircraft).
PressNEXT from the Flight Mode Name page to access the flight
mode table assignment page when Custom flight mode has been
selected in the Flight Mode Setup page. The combination of up
to 2 or 3 switches can be used to access all of the flight modes
available.
Helicopter Flight Mode Setup
You can assign up to five flight modes including throttle hold using
any combination of up to three switches including a throttle hold
switch.
Sailplane Flight Mode Setup
You can assign up to ten flight modes using any combination of
up to three switches. You can also assign a priority switch. When
the priority switch position is active, only the current flight mode is
active, regardless of other switch positions.
Multirotor Flight Mode Setup
By default, switch B is assigned 3 Flight Modes. You can assign up
to five flight modes using any combination of up to two switches.
Channel Assign
Scroll and Select Channel to assign channel inputs and outputs for
each Flight Mode. Each channel can be assigned any switch on the
transmitter including but not limited to trim switches, gimbals and the
Clear/Back buttons.
Example: Assign Flight Mode 1 to be your primary flight mode where
yourgimbalscontrolprimaryightaxis.SwitchingtoFlightMode2,
youcanhavethegimbalscontrolthecameraaxisandthetrimbuttons
controlprimaryightaxis.
Tip: You can also access the Channel Assign from the Channel
Assign Menu in System Setup.
Number of Flight
Modes 2 3 3* 4 4 5
Switch1(numberof
positions) 2P 3P 2P 2P 3P 3P
Switch2(numberof
positions) 2P 3P 2P 3P
Flight Mode 1 Launch Launch Launch Launch Launch Launch
Flight Mode 2 Cruise Cruise Cruise Cruise Cruise Cruise
Flight Mode 3 Land Land Land
Flight Mode 4 Thermal Thermal Thermal Thermal
Flight Mode 5Speed Speed
*Must be set up in a 4/5 flight mode.
SYSTEM SETUP
Aircraft and Sailplane Flight Mode Table

19
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
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Enables you to assign custom names to the Flight Mode positions.
Flight Mode names can include up to 20 characters, including
spaces.
To change the Flight Mode name:
1. Scroll to the Flight Mode name you wish to change and press
the scroll wheel.
2. Scroll to the character position you wish to change and press
thescrollwheelonce.Aashingboxappears.
3.Scrollleftorrightuntilthedesiredcharacterappears.Press
the scroll wheel once to save the character. Insert a character
by selecting <+> or delete a character by selecting <->.
4. Repeat Steps 2 and 3 until the Model Name is complete.
5.SelectBACKtoreturntotheFlightModeNameslist.
Spoken Flight Mode:
The Spoken Flight Mode option enables you to activate audio flight
mode alerts. As you change between flight modes, the transmitter
will “speak”, informing you of the active flight mode. You can select
a word or phrase for each flight mode.
To activate Spoken Flight Mode:
1. Enter the Spoken Flight Mode menu option.
2.Scrollto<Silence>(default),thenpressthescrollwheel.
3. Scroll left or right to view the options.
4.Pressthescrollwheelagaintosavetheselection.
The Channel Assignment function allows you to reassign almost
any receiver channel to a different transmitter channel. For
example,thereceivergearchannelcouldbere-assignedtothe
transmitter throttle channel.
1. Scroll to the receiver channel you wish to change.
2.Pressthescrollwheelonceandscrollleftorrighttochange
the receiver input selection.
3.Pressthescrollwheelasecondtimetosavetheselection.
IMPORTANT:Youcannotassignamixtoachannelthathasbeen
moved.Createthemixrst,thenmovethechannel.
The Channel Input Configuration screen enables you to assign a
transmitter channel to a different control stick or switch.
1. Select NEXTontheRXPortAssignmentsscreentoaccessthe
Channel Input Configuration screen.
2. Scroll to the transmitter channel you wish to re-assign and
pressthescrollwheel.Theboxaroundthecurrentinput
selection flashes.
3. Scroll left or right to select the desired control stick or switch.
4.Pressthescrollwheeltosavetheselection.
SYSTEM SETUP
Spoken Flight Mode Setup
Channel Assignment
Channel Input Configuration
See the “Programming Failsafe Positions” section on page 12 for
Throttle limitations.

20
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
SYSTEM SETUP
X-Plus Input Configuration
TheX-PlusInputCongurationscreenenablesyoutoassignany
X-Pluschanneltoanytransmitterinput.
1. Select NEXT on the Channel Input Config screen to access the
X-PlusInputCongscreen.
2.ScrolltotheX-Pluschannelyouwishtochange.
3.Pressthescrollwheelonceandscrollleftorrighttochange
theX-PlusInputforthatX-Pluschannel.
Use the Trim Setup screen to change the size of the trim step
and the trim type.
Trim Step
Adjusting the trim step value determines how many “clicks” of
trim you input each time you press the trim button. Changing
the trim step value to 0 disables the trim for the channel.
To change the trim step value:
1. Scroll to the trim step channel you wish to change.
2. Select the trim step value and scroll left or right to change
the value.
3.Pressthescrollwheeltosavetheselection.
Trim Type
The two Trim Type options are Common and F Mode.
Common trim type maintains the same trim values for all flight
modes.
F Mode trim type enables you to save trim values for individual
ightmodesifyound,forexample,theaircraftrequiresaileron
trim in Flight Mode 1 but not in Flight Mode 2.
Trim Assignment
In a few instances, you can reassign a trim to a different
location.
Aircraft Model Type
Throttle
• ThrottleDigitaltrimbutton(default)
Throttle Trim Type
• Common
• Flight Mode
Trim Location
Normal and Cross trim types are available. Normal trims align with
thecontrolstick;forexample,thethrottletrimisnexttothethrottle
stick.
Crosstrimsreversethepositionofthetrims;forexample,thethrottle
trimisnexttotheelevatorstickandviceversa.
TochangetheTrimPositionfromNormaltoCrossed,selectNormal
at the bottom of the Trim Setup screen and press the scroll wheel.
IMPORTANT: Crossed trims will cross both sets of trims for both
gimbals.
Left/Right Digital Trims
The Left and Right Digital Trims can be programmed as either
CommonorF-ModeforNormal,2-Pos,or3-Posoperation.
Trim Setup
CAUTION: Do NOT connect throttle or any primary con-
trolsurfacetotheX-PlusModule.TheX-Pluschannels
areintendedtobeusedforauxiliaryfunctionsonly.X-Pluschan-
nelshavearesolutionof512andvariablelatencyfrom22msto
about88ms.WhenX-Plusisactive,therst10channelsdefault
to 22ms.