Spektrum SPMR20500 Manuel utilisateur

Instruction Manual

Bedienungsanleitung

Manuel d’utilisation

Manuale di Istruzioni

NX20

20-Channel 2.4GHz

DSMX® Aircraft System

Scan the QR code and select the Manuals and Support

quick links from the product page for the most

up-to-date manual information.

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Produktseite die Quicklinks Handbücher und Unterstützung,

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145156 Created 11/22

SPMR20500, SPMR205001

SPMR20500EU

2SPEKTRUM NX20 • 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 components 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 perform ance 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

disclaims all liability outside of the intended purpose and will not provide warranty service related thereto.

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.

• When working with a model, always power on the transmitter

ﬁrst and power off the transmitter last.

• 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 ﬂying.

• Time ﬂights so you can ﬂy safely within the time allotted by your

battery.

• Perform a range check of the transmitter and the model before

ﬂying the model.

• Make sure all control surfaces correctly respond to transmitter

controls before ﬂying.

• Do NOT ﬂy a model near spectators, parking areas or any other

area that could result in injury to people or damage to property.

• Do NOT ﬂy during adverse weather conditions. Poor visibility,

wind, moisture and ice can cause pilot disorientation and/or

loss of control of a model.

• When a ﬂying 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 or towerhobbies.com and click on the support or resources 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:

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.

CAUTION: Procedures, which if not properly followed, create the probability of physical property damage AND a possibility of serious injury.

NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND little or no possibility of injury.

Age Recommendation: Not for Children under 14 years. This is not a toy.

Warranty Registration

Visit www.spektrumrc.com today to register your product.

NOTICE: While DSMX technology allows you to use more than 40 transmitters simultaneously, when using DSM2 receivers, DSMX

receivers in DSM2 mode or transmitters in DSM2 mode, do not use more than 40 transmitters simultaneously.

BEFORE USING YOUR TRANSMITTER

Before going any further, visit the Spektrum Community website at www.spektrumrc.com to register your transmitter and

download the latest Spektrum AirWare™ ﬁrmware updates. A registration reminder screen occasionally appears until you

register your transmitter. When you register your transmitter, the reminder screen does not appear again.

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.

3SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

BOX CONTENTS SPECIFICATIONS

For helpful videos on programming the NX20 and other Spektrum

AirWare™ equipped transmitters, go to www.spektrumrc.com.

* EU versions of the NX20 are not compatible with DSM2® receivers.

Type DSM2/DSMX 20 CH Telemetry Transmitter

Application Airplanes, Helicopters, Sailplanes, Multirotors

Channels 20

Wireless Trainer DSM2*/DSMX Compatible

Switches

4 - 2 Position, 6 - 3 Position,

4 - Trimmers, 2 - Sliders,

1 rotary knob, 1 Momentary Button

Modulation DSM2*/DSMX

Telemetry Integrated

Bind Method Bind Button or From Within Menu

Frame Rate 22ms Default,

11ms Selectable (Digital Servos Required)

Resolution 2048

Battery 3.7V 6,000 mAh LiIon

Band 2.4GHz

Feedback Tone, Vibration, Voice

Basic Operation .......................................................................... 5

Transmitter Functions ................................................................ 6

Powering the NX20 On and Off ................................................... 7

Charging the Lithium Ion Battery Pack ...................................... 8

Navigation ................................................................................... 9

Main Screen ................................................................................ 9

Keyboard Style .......................................................................... 10

Auto Switch Select ................................................................... 10

OTF (On The FLy) Trim Functions.............................................. 10

Pre-installed BNF model ﬁles................................................... 11

USB and Internal Memory ........................................................ 11

External Memory card .............................................................. 11

Memory card Functions ........................................................... 12

Update Spektrum AirWare™ Software ........................................ 12

Model Type Programming Guide .............................................. 13

System Setup ............................................................................ 14

Model Select ............................................................................. 14

Model Type ............................................................................... 14

Model Name ............................................................................. 15

Flight Mode Examples ............................................................... 15

Flight Mode Setup ..................................................................... 16

Spoken Flight Mode .................................................................. 16

Channel Assign ......................................................................... 17

Channel Input Conﬁguration ....................................................... 17

Rx Port Assignments ................................................................. 17

Trim Setup ................................................................................ 17

Model Utilities ........................................................................... 18

Create New Model .................................................................... 18

Delete Model ............................................................................ 18

Copy Model .............................................................................. 19

Model Reset ............................................................................. 19

Sort Model List ......................................................................... 19

Validate All Models .................................................................... 19

Delete All Models ...................................................................... 19

Warnings .................................................................................. 19

Telemetry ................................................................................. 20

Telemetery data ........................................................................ 20

Telemetry Auto-Conﬁguration ..................................................... 20

Settings .................................................................................... 21

File Settings .............................................................................. 21

Preight Setup .......................................................................... 22

Frame Rate, RF Mode, and Failsafe ........................................... 22

Bind .......................................................................................... 23

Serial Port Setup ....................................................................... 23

Trainer ...................................................................................... 24

Wired Trainer ........................................................................... 24

Wireless Trainer ........................................................................ 24

Instructor Transmitter Conﬁguration ............................................ 25

Binding Wireless Trainer ............................................................ 25

Head Tracking FPV Setup ........................................................... 25

Center Tone .............................................................................. 26

Sound Utilities ........................................................................... 26

Palette Utilities .......................................................................... 26

System Settings ........................................................................ 26

User Name ............................................................................... 26

Roller Menu .............................................................................. 26

Brightness ................................................................................ 27

Mode* ...................................................................................... 27

Battery Alarm ............................................................................ 27

Selecting a Language ................................................................ 27

Inactive Alarm ........................................................................... 27

Extra Settings ........................................................................... 28

System Sounds ......................................................................... 28

Vibrator Intensity Adjustment...................................................... 28

Keyboard .................................................................................. 28

Trim Style ................................................................................. 28

Volume Controls ........................................................................ 28

Channel Monitor ....................................................................... 28

Set Date/Time ........................................................................... 29

Power Sounds .......................................................................... 29

Factory Reset............................................................................ 29

Calibrate ................................................................................... 29

WiFi Utilities .............................................................................. 29

USB Settings ............................................................................. 29

Transfer SD Card....................................................................... 30

Category .................................................................................. 30

Model Import/Export .................................................................. 30

Memory Location ...................................................................... 30

File/Folder Management ............................................................ 31

Palette Import/Export ................................................................. 31

Special Features ....................................................................... 31

About / Regulatory .................................................................... 32

Serial Number ........................................................................... 32

Exporting the Serial Number to the Memory card ........................ 32

TABLE OF CONTENTS

• NX20 Transmitter

(SPMR20500, SPMR20500EU, and SPMR205001)

• Manual

• USB-C magnetic charge cable and adapter

• Decal set

• Neck strap

4SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

Locating the Transmitter Spektrum AirWare Software Version ....... 32

Function List ............................................................................. 33

Servo Setup .............................................................................. 33

Travel Adjust ............................................................................. 33

Sub-Trim .................................................................................. 33

Reverse .................................................................................... 33

Speed ...................................................................................... 34

Absolute (Abs.) Travel ................................................................ 34

Channel Name .......................................................................... 34

Balance .................................................................................... 34

Rates and Expo ......................................................................... 34

Throttle Cut ............................................................................... 35

Throttle Curve ........................................................................... 35

Analog Switch Setup ................................................................. 35

Digital Switch Setup .................................................................. 36

Logical Switch Setup ................................................................ 36

Combo Switch Setup ................................................................ 36

Mixing ...................................................................................... 37

Normal Mix ............................................................................... 37

Curve Mix ................................................................................. 38

Curve (Page) Advanced Conﬁguration Options ............................. 38

Sequencer ................................................................................ 38

Range Test ................................................................................ 39

Timer ........................................................................................ 40

Telemetry ................................................................................. 40

Telemetry Auto-Conﬁguration ..................................................... 40

Forward Programming .............................................................. 40

Audio Events ............................................................................. 41

VTX Setup ................................................................................. 41

Function Bar ............................................................................. 41

Bind .......................................................................................... 42

Start Trainer .............................................................................. 42

System Setup ........................................................................... 42

Charge Status ........................................................................... 42

Monitor ..................................................................................... 43

ACRO (Airplane) ........................................................................ 43

Aircraft Type (System Setup) ..................................................... 44

Recommended Servo Connections ............................................ 44

Elevon Servo Control ................................................................. 45

Flap System (Function List) ....................................................... 45

ACRO Mixing (Function List) ...................................................... 45

Differential (Function List) ......................................................... 46

V-Tail Differential (Function List) ................................................ 46

Gyro Menus (Function List) ........................................................ 46

Pitch Curve (Function List) ........................................................ 46

Multi-Engine Control (System Setup) ....................................... 47

HELI (Helicopter) ....................................................................... 48

Swash Type (System Setup) ...................................................... 48

Collective Type (System Setup) ................................................. 48

Pitch Curve (Function List) ........................................................ 48

Swashplate (Function List) ........................................................ 49

Gyro (Function List) ................................................................... 49

Tail Curve (Function List) ........................................................... 49

Mixing (Function List) ................................................................ 49

Sail (Sailplane) .......................................................................... 50

Sailplane Type (System Setup) ................................................. 50

Sailplane Image ........................................................................ 50

Camber Preset (Function List) ................................................... 50

Camber System (Function List) ................................................. 50

SAIL Mixing (Function List) ........................................................ 51

Multi (Multirotor) ...................................................................... 52

F-Mode Setup (System Setup) ................................................... 52

Trim Setup (System Setup) ........................................................ 52

Rates and Expo (Function List) .................................................. 52

Motor Cut (Function List) ........................................................... 53

Motor Curve (Function List) ....................................................... 53

Physical Transmitter Adjustments ........................................... 54

Antenna Position ....................................................................... 54

Gimbal Adjustments .................................................................. 54

Adjust Stick Tension .................................................................. 54

Control Stick Length Adjustment .............................................. 54

Gimbal Travel Limit ................................................................... 54

Ratcheted Throttle – Smooth Throttle Adjustment ...................... 55

Mode Conversion ...................................................................... 55

Troubleshooting Guide .............................................................. 56

1-Year Limited Warranty .......................................................... 57

Warranty and Service Contact Information ............................. 58

FCC Information ........................................................................ 58

IC Information ........................................................................... 58

Compliance Information for the European Union .................... 59

5SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

Interface

The power button is the Spektrum logo (1); press and hold for

several seconds to power the transmitter ON or OFF. There are

three buttons on the left side of the screen; Clear (2), Back (3)

and Function (4). The scroll wheel (6) can be pressed or rolled to

access functions and change values.

Main Screen

When powered ON the system will display the Main Screen (5)

which will show basic information for use during operation.

Telemetry screens and a channel monitor are available from the

Main Screen by rolling the scroll wheel.

System Setup

The transmitter will power OFF the RF when you enter the System

Setup menu, power OFF the receiver when entering the System

Setup menu to prevent accidental motor operation. Press the scroll

wheel to open the Function List from the Main Screen, scroll to

the bottom of the list and select System Setup by pressing the

scroll wheel again. The System Setup menu is where you set

model features that deﬁne your model (wing and tail type, assign

switches and trims, conﬁgure ﬂight modes, etc). This is also where

system-wide settings reside including sound and palette utilities,

wiﬁ, USB and SD card settings.

Function List

Press the scroll wheel to open the Function List from the Main

Screen. This is where model speciﬁc features for ﬁnal model setup

are accessed such as servo settings, rates and expo, throttle

settings, mixing, range testing, etc. These settings are unique

to each model ﬁle. Select the model you want to work with ﬁrst,

deﬁne your settings in the system setup menu, and then use the

features in the function list to ﬁnalize setup for your model.

Model Files

All the settings for a model are stored under a model ﬁle. To

conﬁgure a new model, begin by selecting the model ﬁle you

want to use. When selecting a new model ﬁle you may chose a

preprogrammed BNF model ﬁle, select a generic BNF templete, or

deﬁne the model type to begin a custom setup.

Model Match technology

The system is designed so the transmitter will only connect to

the receiver it was bound to, and the connection is unique to

the selected model ﬁle. The transmitter will only connect with

a receiver when the model ﬁle it was bound to is selected,

preventing operation with the wrong model ﬁle.

Binding

Binding is the process of linking the transmitter and receiver. Verify

the transmitter is set to the model ﬁle you want to use. To bind the

transmitter to the receiver, ﬁrst put the receiver into bind mode.

Then put the transmitter into bind mode from the System Setup

menu, Function List, or by pressing the I button when powering the

transmitter ON. A connection is established when the LED on the

receiver illumniates solid orange.

BNF Setup

The NX20 is pre-loaded with model ﬁles for many Horizon Hobby

BNF aircraft.

1. From the Main Screen press the Clear and Back buttons at

the same time to enter the Model Select menu.

2. Choose Add New BNF, and select the brand of your airplane

and then the model.

or

Chose Add New from Template for a generic BNF template

desgined for simple models with 4 channels or less.

3. Remove the propeller on electric aircraft as a safety

precaution where applicable.

4. Follow your aircraft manual for binding and setup details

which may include SAFE Select. Bind the transmitter to the

receiver. Receivers with AS3X or SAFE must remain still after

powering ON before the transmitter gains control.

5. Check all control surfaces for correct response.

6. Re-install the propeller and test ﬂy.

Custom Model Setup

1. Enter the Model Select menu.

2. Choose Add New Model. Model type is selected when you

set up a new model and will dictate other options within the

menus.

3. Enter the System Setup menu to deﬁne basic settings for your

model. If you want to change the model type do that ﬁrst, all

settings within the model ﬁle will be reset when the model

type is changed.

4. Name the model ﬁle.

5. Select wing and tail type, which enables functions like ﬂaps

and built-in mixing for dual aileron servos or elevons. The

menus for items like ﬂaps will not appear in the Function List

until a feature requiring its use is selected in the wing and

tail type settings. Changing the wing or tail type will reset any

changes from default in the Channel Assign menu.

6. Remove the propeller on electric aircraft as a safety

precaution where applicable.

7. Bind the transmitter to the receiver.

8. Conﬁgure servo directions, center control surfaces, adjust

travel, set rates and ﬂight modes.

9. Conﬁgure auxillary functions.

10. Check all control surfaces for correct response.

11. Re-install the propeller and test ﬂy.

BASIC OPERATION

6

5

4

3

2

1

6SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

TRANSMITTER FUNCTIONS

Function

1On/Off Switch and RF LED

Indicator

2R Trimmer

3Switch E2

4R Knob

5Switch E

6Right Top Trimmer

7Switch H

8Switch G

9Switch F

10

Throttle Tension

Adjustment

Throttle Ratchet

Adjustment

(Mode 1, 3)

11 Gimbal Travel Limiter

Access Panel

12 Rear Lever Tension

Adjustment*

13 Mode Change

Function

14

Throttle/Aileron Stick

(Mode 1)

Elevator/Aileron Stick

(Mode 2)

Throttle/Rudder Stick

(Mode 3)

Elevator/Rudder Stick

(Mode 4)

15 Up/Down Gimbal Stick

Tension Adjustment

16 Left/Right Gimbal Stick

Tension Adjustment

17 Gimbal Travel Limiter

Access Panel

18 Aileron Trim (Mode 1, 2)

Rudder Trim (Mode 3, 4)

19 Scroll wheel

20 Elevator Trim (Mode 1, 3)

Throttle Trim (Mode 2, 4)

21 Neck Strap Mount

22 LCD

Function

23 Elevator Trim (Mode 2, 4)

Throttle Trim (Mode 1, 3)

24 Function Button

25

Throttle Tension

Adjustment

Throttle Ratchet

Adjustment

(Mode 2, 4)

26 Back Button

27 Clear Button

28 Rudder Trim (Mode 1, 2)

Aileron Trim (Mode 3, 4)

29 Gimbal Travel Limiter

Access Panel

30 Mode Change

31

Elevator/Rudder Stick

(Mode 1)

Throttle/Rudder Stick

(Mode 2)

Elevator/Aileron Stick

(Mode 3)

Throttle/Aileron Stick

(Mode 4)

Function

32 Left/Right Gimbal Stick

Tension Adjustment

33 Rear Lever Tension

Adjustment*

34 Up/Down Gimbal Stick

Tension Adjustment

35 Gimbal Travel Limiter

Access Panel

36 Switch C

37 Switch B

38 Switch A

39 Left Top Trimmer

40 Switch D

41 I Button

42 Switch D2

43 L Trimmer

44 Speaker

45 RF LED Indicators

46 Antenna

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42 43

44

46

1

45 2 3

4

5

6

7

2

3

4

5

6

7

8

9

13

14

15

16

17

18

19

20

21

22

10

11

12

7SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

POWERING THE NX20 ON AND OFF

1. Press and hold the power button (Spektrum logo) for several

seconds to turn ON the NX20.

2. Press and hold the power button for about 4 seconds to power

OFF the NX20.

Function

1Antenna

2Handle

3I Button

4Left Top Trimmer

5A Switch

6B Switch

7Left Slider

8Left Rubber Grip

9Compliance label

10 Wired Trainer and CSRF Connection Port

11 Audio Port

12 Battery Tray Mounting Screws

13 Battery Tray

14 USB-C

15 Memory Card Port

16 M3 threaded mounting holes for CSRF

module (not included)

17 Right Rubber Grip

18 Right Lever

19 G Switch

20 H Switch

21 Right Top Trimmer

22 R Knob

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42 43

44

46

1

45 2 3

4

5

6

7

2

3

4

5

6

7

8

9

13

14

15

16

17

18

19

20

21

22

10

11

12

8SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

For optimum charging results, the built-in charger requires a USB

power supply capable of at least 2-3A output. Using a power supply

with a lower output will result in very long charge times or the

transmitter not charging if it is powered on while attempting to charge.

The ﬁrst time the transmitter is charged, the charge time may be

6-7 hours. Charge the transmitter when the low battery alarm

sounds. See the System Settings section for information on setting

the low battery alarm level.

Always charge the transmitter on a heat-resistant surface.

CAUTION: Never change the low voltage limit for Li-Ion

batteries below 3.3V. Doing so could over-discharge the

battery and damage both battery and transmitter.

CAUTION: Never leave a charging battery unattended.

CAUTION: Never charge the battery outside of the

transmitter. Charging the battery outside of the

transmitter may interfere with the battery monitoring system,

which can give false low battery warnings.

1. Connect a 2-3A USB power supply (not included) to an AC outlet.

2. Connect the included magnetic USB charging cable to the

power supply.

3. Insert the included magnetic USB-C adapter in the USB port

on the back of the transmitter.

4. Connect the USB charging cable to the magnetic adapter.

5. The power button will illuminate green while charging. A fast

press of the power switch will bring the battery charge status

icon to the display.

6. Charging is complete when the green light on the power

button goes out. Disconnect the USB cable once charging is

complete.

Disconnect the power supply from the power outlet.

The magnetic micro USB adapter can be left in the transmitter

USB port for future use.

CHARGING THE LITHIUM ION BATTERY PACK

CHARGING WARNINGS

WARNING: 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.

• NEVER LEAVE CHARGING BATTERIES UNATTENDED.

• NEVER CHARGE BATTERIES OVERNIGHT.

• Never attempt to charge dead, damaged or wet battery packs.

• Never attempt to charge a battery pack containing different

types of batteries.

• Never allow children under 14 years of age to charge battery packs.

• Never charge batteries in extremely hot or cold places or place

in direct sunlight.

• Never charge a battery if the cable has been pinched or shorted.

• Never connect the charger if the power cable has been pinched

or shorted.

• Never attempt to dismantle the charger or use a damaged charger.

• Always use only rechargeable batteries designed for use with

this type of charger.

• Always inspect the battery before charging.

• Always keep the battery away from any material that could be

affected by heat.

• Always monitor the charging area and have a ﬁre extinguisher

available at all times.

• Always end the charging process if the battery becomes hot to the

touch or starts to change form (swell) during the charge process.

• Always connect the positive leads (+) and negative leads (–) correctly.

• Always disconnect the battery after charging, and let the

charger cool between charges.

• Always charge in a well-ventilated area.

• Always terminate all processes and contact Horizon Hobby if

the product malfunctions.

• Charge only rechargeable batteries. Charging non-rechargeable

batteries may cause the batteries to burst, resulting in injury to

persons and/or damage to property.

• The USB outlet shall be installed near the equipment and shall

be easily accessible.

CAUTION: Always ensure the battery you are charging

meets the speciﬁcations of this charger. Not doing so can

result in excessive heat and other related product malfunctions,

which can lead to user injury or property damage.

CAUTION: If at any time during the charging process the

battery pack becomes hot or begins to puff, disconnect

the battery immediately and discontinue the charge process as

batteries can cause ﬁre, collateral damage and injuries.

9SPEKTRUM NX20 • 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.

• Scroll from the main screen to view telemetry screens and 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

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.

Roll to select the box, then click the scroll wheel to change the

selected box. When the selected box is black it indicates the

value or condition will act on that position, white means that

position is not selected, and grey means that position is not

assigned to anything (with the default color palete).

The following example shows the switch for Rates is in the 1

position (tick below the box), and the grey means the 1 switch

position is not assigned to anything.

In order to reset back to default; select the switch position ﬁrst,

then set the curve number to match the switch position, then set

the box for that switch position to black.

NAVIGATION

MAIN SCREEN

Function

1Model name

2Forward signal strength as reported by the telemetry

3Telemetry data being recorded

4Smart device connected

5Throttle stick position (0-100)

6Digital battery voltage (an alarm sounds and the screen ﬂashes

if the battery charge gets down to 3.2V.)

7Modulation type, shown after binding (DSMX/DSM2)

8Model avatar

9Elevator trim (Mode 2, 4)

Throttle trim (Mode 1, 3)

10 Aileron trim (Mode 1, 2)

Rudder trim (Mode 3, 4)

11 Function bar

12 Transmitter system clock

13 Time

Function

14 Rudder trim (Mode 1, 2)

Aileron trim (Mode 3, 4)

15 Throttle trim (Mode 2, 4)

Elevator trim (Mode 1, 3)

16 Model timer

8

7

6

35

15

16

2

9

13

4

14 10

11

12

1

10 SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

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OTF (ON THE FLY) TRIM FUNCTIONS

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. Verify the switch selection is now displayed as desired. When

correct, press the scroll wheel to select this switch and complete

the switch selection.

KEYBOARD STYLE

There are three different styles of keyboard entry for the letters.

• SwiftBoard – Full keyboard with numbers on top (default)

• RapidBoard – Full Keyboard with number pad on right

As you scroll to the next line the selection will jump down to the

next line. Scrolling through the keyboard characters is normally

side to side. Holding the function key down while scrolling

changes the navigation direction to up and down.

A set of letters with accents appear when a vowel is

highlighted. Press and hold the function key and click the scroll

wheel to select an accented letter.

• Legacy – Original single line input, with scrolling through

individual characters

To activate the OTF feature for a given function:

1. Navigate to the desired function screen.

2. Select OTF to open the Conﬁguration screen.

3. Select Inhibit to select a switch.

4. Select the desired trim switch to assign to the trimmer value.

Each trim button may only be assigned to a single function at a

time. If a trim button is already in use elsewhere, a warning dialog

appears asking to conﬁrm the change to the new function.

5. Select the Min / Max values to assign a minimum and

maximum value for the trimmer. The minimum value is the

lowest value the trim button will adjust to. The maximum value

is the highest. Touch OK when the Min / Max values are set.

CAUTION: Never assign a minimum or maximum value

that could negate the travel of a control surface, such as

with dual rates. Setting a dual rate value of 0% will keep the

control surface from moving and could cause a loss of control of

the aircraft.

Many functions of the NX20 allow for making ﬁne adjustment using available trim switches while ﬂying your aircraft including:

• Dual Rate

• Exponential

• Programmable Mixes

• Pre-Conﬁgured Mixes

• Flap System

• Differential

• V-Tail Differential

• Camber Presets

• Camber System

11SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

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EXTERNAL MEMORY CARD

USB AND INTERNAL MEMORY

PRE-INSTALLED BNF MODEL FILES

The internal memory may be accessed via the USB-C port on the

transmitter to enable the following tasks:

• Update Spektrum AirWare software in the transmitter

• Install/Update sound ﬁles

• Back up models for safe keeping

• Export or import model setup ﬁles for sharing with friends

• Import/Export Color Palettes

To connect to the internal memory:

1. Connect a Micro USB cable to your PC and the micro USB

connector on the back of the transmitter.

2. Power ON the transmitter, enter the system menu -> USB

storage, select Access Internal Storage, the NX20 will connect

to your PC.

3. Complete your ﬁle transfer(s).

4. Press the Back button or the roller to exit.

5. Disconnect the USB cable from your transmitter.

Installing An External Memory Card

A micro memory card (not included) enables you to:

• Import (copy) models from any compatible* Spektrum

AirWare™ transmitter

• Export (transfer) models to any Spektrum AirWare transmitter*

• Update Spektrum AirWare software in the transmitter

• Install/Update sound ﬁles

• Back up models for safe keeping

• NX radios only export NSPM ﬁles. NSPM ﬁles may be read by

any NX or IX radio. You can go from DX to NX, but not from NX

to DX.

To install or remove a Memory card:

1. Power OFF the transmitter.

2. Press the Memory card into the card opening with the card

label facing up.

IMPORTANT: Memory cards over 32gb may be used. When

cards are 32gb or smaller, they must be in FAT or FAT32

format. When larger than 32gb, the cards must be in exFAT

format. Cards must be SDHC or SDXC type. “Ultra Capacity”

(SDUC) cards are not compatible.

The NX20 is pre-loaded with model ﬁles for many Horizon Hobby

BNF aircraft. For new product releases download the latest

selection of model ﬁles from www.HorizonHobby.cc/NXreload

BNF: Select Add new BNF from Model Select and search for your

model. When you choose a BNF model ﬁle a new model will be

created using the preconﬁgured settings based on the aircraft

manual recommendations.

Template: There are generic model ﬁles available under Model

Select to cover model ﬁles that are not available in the BNF model

ﬁle list. Select Add New from Template for simple aircraft setups.

IMPORTANT: After selecting a BNF or template model ﬁle

you must follow the instructions from your aircraft manual to

complete setup prior to ﬂight.

12 SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

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MEMORY CARD FUNCTIONS

Update Spektrum AirWare™ Software

NOTICE: The orange LED Spektrum bars ﬂash and a status

bar appears on the screen when Spektrum 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 Spektrum AirWare ﬁles, always

Export All Models to an Memory card separate from the

Memory card containing the update. The update may erase all

model ﬁles.

For more information on Spektrum AirWare software updates, visit

www.spektrumrc.com.

Software updates may be completed with either the micro Memory

card or using WiFi. See the section in this manual covering WiFi for

more inforamtion about updating with WiFi.

Automatically Installing Spektrum AirWare Software Updates

1. Go to www.spektrumrc.com. Under the Setups/Updates pull

down tab, select the Firmware Updates link (shown).

2. Log into your Spektrum account.

3. Find your registered transmitter in the MY PRODUCTS list and

click on Download Updates. Follow directions on the screen

for downloading the update to an Memory card through your

computer.

4. Eject the Memory card from the computer.

5. Make sure the transmitter is powered off and install the

Memory card into the transmitter.

6. Power on the transmitter and the update automatically installs

in the transmitter.

Manually Installing Spektrum AirWare Software Updates

1. Save the desired Spektrum AirWare version to a memory

card.

2. Insert the memory card into the transmitter.

3. Enter the System Setup menu and open Transfer SD Card.

4. Scroll down to SD Card and press to change. Internal is the

memory built into the transmitter and External is the memory

card which is removable. Select External.

5. Select Category and scroll to Special Functions.

6. Scroll to Options, press the scroll wheel to select, and scroll

to Update Firmware. Press the scroll wheel and the Select File

screen appears.

7. Select the desired Spektrum 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.

13SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

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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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Throttle Curve

3–Axis Gyro

Gyro (1,2,3)

Flap System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Motor Curve

Camber Presets

Camber System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Control Setup

D/R and Expo

Motor Cut

Motor Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Throttle Cut

Throttle Curve

Pitch Curve

Swashplate

Gyro

Tail Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start TimerSystem Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Throttle Curve

3–Axis Gyro

Gyro (1,2,3)

Flap System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Motor Curve

Camber Presets

Camber System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Control Setup

D/R and Expo

Motor Cut

Motor Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Throttle Cut

Throttle Curve

Pitch Curve

Swashplate

Gyro

Tail Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start TimerSystem Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Throttle Curve

3–Axis Gyro

Gyro (1,2,3)

Flap System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Motor Curve

Camber Presets

Camber System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Control Setup

D/R and Expo

Motor Cut

Motor Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Throttle Cut

Throttle Curve

Pitch Curve

Swashplate

Gyro

Tail Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start TimerSystem Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Throttle Curve

3–Axis Gyro

Gyro (1,2,3)

Flap System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Differential

V-Tail Differential

Throttle Cut

Motor Curve

Camber Presets

Camber System

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Control Setup

D/R and Expo

Motor Cut

Motor Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start Timer

System Setup

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

Serial Port Setup

Trainer

Analog Switch Setup

Digital Switch Setup

Center Tone

Sound Utilities

System Settings

WiFi Utilities

USB Settings

Transfer SD Card

About/Regulatory

Function List:

Servo Setup

D/R and Expo

Throttle Cut

Throttle Curve

Pitch Curve

Swashplate

Gyro

Tail Curve

Mixing

Sequencer

Range Test

Timer

Telemetry

Forward Programming

Audio Events

VTX Setup

Function Bar

Start TimerSystem Setup

Monitor

14 SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

Enter the System Setup menu to deﬁne baseline settings for your model such as what type of aircraft, wing type, ﬂight mode setup, etc.

The options chosen in the system menu conﬁgures the function list for the chosen model number for your requirements. Some options,

such as the ﬂap menu, will not appear at all in the function list until they are selected within the System Setup menu.

Press and hold the scroll wheel (2) while powering ON the transmitter (1). You can also enter the System Setup from the Function

list without turning the transmitter off. No radio transmission occurs when a System Setup screen is displayed, preventing accidental

damage to linkages and servos during changes to programming.

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.

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.

SYSTEM SETUP

Model type denes some of the basic features in the Function

List and the System Setup menus. When you set the model

type it changes what the options are in the Wing Type/Swash

Type menu, and that selection further denes which options are

available in the Function List. Select from Airplane, Helicopter,

Sailplane or Multicopter model types.

Model type is set when adding a new model, or it may be

changed in the System Setup menu:

1. Select Model Type in the System Setup menu.

2. Scroll to the desired model type and press the scroll wheel.

The Conﬁrm Model Type screen appears.

3. Select Yes and press the scroll wheel to conﬁrm the model

type. All data will be reset. Selecting No will exit the Conﬁrm

Model Type screen and return to the Model Type screen.

IMPORTANT: When you select a model type, the transmitter

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

Model Select

Model Type

WARNING: Do not press YES unless the model is turned

off or the model is secured.

If you do not press YES or NO, the system will exit to the main

screen and continue operation within approximately 10 seconds.

2

1

15SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

Model Name enables you to assign a custom name to the current

model memory. Model names can include up to 20 characters,

including spaces.

Aircraft Type

This menu is only available in Airplane Mode. See ACRO (Airplane) section for set up.

Sailplane Type

This menu is only available in Sailplane Mode. See SAIL (Sailplane) section for set up.

Swash Type

This menu is only available in Helicopter Mode. See HELI (Helicopter) section for set up.

Aircraft Options

This menu is only available in Multirotor Mode. See MULTI (Multirotor) section for set up.

Model Name

Flight Mode Examples

Flight modes enable a pilot to organize transmitter functions into

groups so they are easier to manage, eliminating the need to ﬂip

multiple switches for ﬂying conﬁguration changes. If a single 3

position switch doesn’t offer enough ﬂight mode choices, you can

expand the ﬂight mode conﬁguration by using 2 or more switches,

enabling up to 10 ﬂight modes, depending on the model type

chosen. A setup table helps you deﬁne what each switch position

does. Changing ﬂight modes can also trigger voice callouts, giving

you conﬁdence in what the switch change will do.

For example, if your airplane has ﬂaps, retracts, and SAFE: On

a single switch you may conﬁgure one ﬂight mode for takeoff

which adds a small amount of ﬂaps with the gear down and

SAFE activated in one switch position, a second ﬂight mode for

normal ﬂight with ﬂaps and gear up and SAFE off on a second

switch position, and a third ﬂight mode for landing with ﬂaps fully

deployed, retracts down and SAFE activated on a third switch

position. By putting all of these features on one ﬂight mode switch,

you don’t have to work separate ﬂaps, gear and SAFE switches

during the ﬂight.

Helicopters take advantage of ﬂight modes by using throttle

curves. Having a “normal” ﬂight mode enables the model to start

from a stop (or idle) and bring the rotor head up to speed and

get the helicopter in the air with a low headspeed. Flight modes

are essential for helicopters to be able to ﬂy inverted and do

aerobatics. “Idle up” or “stunt” modes enable the use of a throttle

curve which keeps the motor running at the same speed for all

throttle stick positions. While in this mode the throttle stick is used

to control collective pitch exclusively. Setups commonly include

multiple “idle up” ﬂight modes, one for medium head speed, and

another for high head speed.

Sailplanes take advantage of ﬂight modes in many ways by

changing the way the control surfaces respond to control inputs. In

a launch mode the throttle stick may move the ﬂaps and ailerons

away from neutral with the stick all the way up, to a slight amount

of camber (ﬂaps down) with the stick all the way down. In a cruise

mode all the ﬂaps and ailerons travel together, up stick offers a

small amount of reﬂex (ﬂaps move up), and down stick offers a

small amount of camber. There may be an aerobatic mode with

high rates and ﬂaps mixed to operate with the ailerons. A crow

mode can provide maximum drag with the ﬂaps and ailerons

moving in opposite directions. In this mode, when the stick is up

the control surfaces are neutral, and when the stick is down the

ﬂaps and ailerons are deployed. Elevator trim compensation needs

change with these mode changes as well, so for each different

ﬂight mode, different elevator compensation values are necessary.

16 SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

EN

Use the Flight Mode Setup menu to assign switches to ﬂight modes.

Select Switch 1, scroll to choose a switch. Enabled Flight Modes

will show how many ﬂight modes are available with the chosen

switch(es). Flip the switch to see what the ﬂight mode will be in

each switch position, the mode is displayed at the bottom of the

page. If you require more than 3 ﬂight modes, select another

switch for Switch 2.

You can assign up to ten ﬂight modes using any combination of

up to three switches. The maximum number of ﬂight modes and

switches available depend on model type.

See the options based on aircraft type in the table below. In

Sailplane mode 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.

Flight Mode Table

Select NEXT from the Flight Mode Setup menu to access the Flight

Mode Table menu. This is where you deﬁne how the combination

of switches is used to access all of the available ﬂight modes.

The assigned switch(es) and their current position are shown

at the top. In the center of the screen the table gives a visual

representation of the switch position. Press the scroll wheel when

FLIG is selected and the box will change to show ﬂight mode

selection. Then, you can roll the scroll wheel to change the ﬂight

mode for that position on the table. Flip through all possible

combinations on your selected switches and deﬁne what ﬂight

modes you want for each combination.

Flight Mode Wizard

Press PREV from the Flight Mode Setup menu to access the Flight

Mode Wizard.

Spoken Flight Mode enables you to chose what you want the

transmitter voice callout to be for ﬂight mode changes.

1. Set up the ﬂight modes on the Flight Mode Setup page.

2. View the Spoken Flight Mode page from the System Setup

menu.

3. Set the ﬂight mode switch position(s) so the ﬂight mode

where you want to make changes is selected. Select the ﬂight

mode you wish to change by setting the ﬂight mode switch

position(s) to that ﬂight mode. The selected ﬂight mode is

shown in the F-Mode Name (by default, unless you change the

ﬂight mode names).

4. Select F-Mode Name to change the written name of the ﬂight

mode. Choose the name of the ﬂight mode by pressing the

scroll wheel to select and rolling to change the selection.

Press the back key to exit.

5. Select Speak to choose the desired voice callout.

IMPORTANT: If you select a telemetry data point it must have

that sensor information available from the model or it will just

say “no data”

6. Test the voice callout by scrolling to TEST and pressing the

scroll wheel.

Spoken Flight Mode

Mode Number of Switches Number of Flight Modes

ACRO 3 10

HELI 3 (including Throttle Hold) 5 (including Throttle Hold)

SAIL 3 10

MULTI 2 5

Flight Mode Setup

17SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

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Trim Setup

Channel Input Conﬁguration

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.

Channel Assign

Rx Port Assignments

The RX Port Assignment screen is a sub menu past Channel Input

Conﬁguration. Select Next in the lower right corner of the Channel

Input Conﬁguration screen to open RX port Assignments. This

function allows you to re-assign almost any receiver channel to a

different transmitter 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 ﬁrst, then move the channel. This

includes wing and tail type settings which feature integrated

mixing. Select the type ﬁrst, then re-assign if neccesary.

NOTICE: Assignment changes made on the transmitter do not

change AS3X or SAFE settings in the receiver.

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

ﬂight modes if you ﬁnd, 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)

Left Lever

Right Lever

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.

Gimbal Trim Assign

Select Next to view open trim mapping of the primary four ﬂight

controls. Options for these include left or right trimmer or top

trimmer.

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Delete Model

Use this selection to permanently delete a model from the model

select list. If you do not wish to delete a model, select Cancel to

exit the page.

1. To delete a model, highlight the model listed. Press to select,

then roll to the model name. Press the scroll wheel to select.

2. Select DELETE to delete the model.

Create New Model

Use this selection to create a new model in the model select list.

1. Select Create New Model. Within this screen, you will have the

option to create a new model or cancel.

2. Select the model type. Choose the aircraft image to deﬁne the

model type for a blank model ﬁle, or select Template to load

a template ﬁle. A SAFE template and a SAFE Select template

come pre-loaded on your NX20.

• Templates are saved in the templates folder on the internal

memory (accessible with the USB connection, new .NSPM ﬁles

may be added)

• The SAFE template puts the 3 position ﬂight mode switch

(Channel 5) on switch B. The Panic button is on the I button

(Channel 6). SAFE airplanes have a ﬁxed conﬁguration in the

receiver and will match this setup after binding.

• The SAFE Select template uses the D switch for ﬂaps

(Channel 5), the A switch for retracts (Channel 6), and the

B button to turn SAFE select ON or OFF (Channel 7). Selecting

this template alone will not enable SAFE Select, it must be done

during the bind process. Also, the switch must be assigned in

the receiver after binding, and the ﬂap travel values need to be

applied. See your airplane manual for more information.

3. If you select Cancel, the system will return to the Model Select

function.

4. If you select Create, the new model will be created and now

be available in the model select list.

WARNING: Complete a preﬂight check before

attempting to ﬂy any model with a new model ﬁle or

template. If you have the controls set up incorrectly for your

aircraft, it may result in loss of control and a crash.

Select the BNF model type setting to access a list of pre-

conﬁgured model ﬁles for Horizon Hobby BNF aircraft.

In the Model Utilities function you can create a new model, delete

a model, copy a model, reset a model to default settings and sort

the model list.

Model Utilities

19SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

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Copy Model

The Model Copy menu enables you to duplicate model

programming from one Model List location to another.

Use Model Copy to:

• Save a default model copy before experimenting with

programming values

• Expedite programming for a model using a similar programming

setup

IMPORTANT: Copying a model program from one model

memory to another will erase any programming in the “To”

model memory.

To copy model programming:

1. Make sure the model program you wish to copy is active. If

the desired model program is not active, select Cancel and

change the active model in the Model Select menu.

2. Select the model memory next to “To” and scroll to the desired

model memory. Press the scroll wheel once to save the

selection.

3. Select Copy and the Conﬁrm Copy screen appears.

4. Select Copy to conﬁrm. Selecting Cancel will return to the

System Setup screen.

5. Select the “To” model as the current model, then bind the

transmitter and receiver. Copying a model does not copy the

bind from the original model.

You cannot use the Model Copy screen to copy model

programming to a memory card. To copy model programming to a

memory card, see “Transfer Memory Card”.

Model Reset

Use the Model Reset menu to delete all model programming in

the active model memory. Reset returns all model settings to the

default settings and erases all programming in the selected model.

After a model reset, it is necessary to re-bind.

Sort Model List

With this function you can sort the model order in the model select

function. This is helpful to group similar models together to make

them easy to ﬁnd. To move a model, highlight the model that you

wish to move with the scroll wheel, then press the scroll wheel to

select it. Scroll the scroll wheel to move the selected model to the

position desired. Press the scroll wheel when you have the model

in the position desired.

Validate All Models

Run this option to verify your model ﬁles are valid. If there are any

corrupted model ﬁles this process can detect them.

Delete All Models

This option will delete all model ﬁles. Only run this option if you

want to remove all models ﬁles, they cannot be recovered once

this option has been executed.

The Warnings menu enables you to program a voice, tone or

vibration alert during power on of the transmitter for any selected

switch or channel position.

The alarm activates and an alert message appears on the screen if

a speciﬁc switch or control stick is in an unsafe position when you

power the transmitter on.

Return the switch or control stick to the safe position to silence the

alarm.

For safety reasons, the default throttle alarm activates if the

throttle position is above 10%.

Warnings

20 SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL

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Telemetry

The telemetry system in the NX20 is compatible with all

generations of Spektrum telemetry DSMX telemetry systems

including module based, receivers with integrated telemetry, and

Smart technology.

Telemetery data

Select the Telemetry menu. Each slot on the telemetry list can be

populated with one telemetry sensor. Select a sensor to adjust

by scrolling to the line with the scroll wheel, and press the scroll

wheel. Scroll to select the sensor. Press the scroll wheel to open

the page where you can adjust the details for that sensor. Each

sensor will have a different page to reﬂect that type of data. Select

Inh under Alarm to choose the type of alarm desired. Options

include Inh, Tone, Vibe and Voice.

Set the Status and Warning Reports to alert you of telemetry data.

Status Reports:

Status Reports automatically report the data on a given interval.

Leave the setting at INH to keep it off, or select a time setting for

how often the transmitter reports the data for that sensor.

Warning Reports:

Warning Reports determine how often a telemetry alert occurs,

if an alarm is active.

Voice reports may also be set in Audio Events, which is accessible

from the Function List.

Telemetry Auto-Conﬁguration

When a receiver is bound to the transmitter, it will complete the

auto-conﬁg setup automatically.

IMPORTANT: The Auto-Conﬁg option is not available from the

System Setup>Telemetry menu. RF signal must be transmitting

when you use the Auto-Conﬁg option. When the System Setup

menu is active, RF signal is off. Use the Telemetry menu in the

Function list to access Auto-Conﬁg.

CAUTION: If you access the Telemetry menu from the

Function List, you may see a Frame Loss appear when

you exit the menu. The Frame Loss is not an error, but there will

be a momentary loss of radio signal when exiting the Telemetry

screen. DO NOT access the Telemetry menu during ﬂight.

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Spektrum SPMR20500 Manuel utilisateur

Spektrum SPMR20500 Manuel utilisateur

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