Spektrum NX20 - User Manual

Questions and Answers

T
Todd JohnsonJul 28, 2025
What to do if Spektrum NX20 will not link to aircraft after binding?
- R
  Ryan RichJul 28, 2025
  If your Spektrum Transmitter isn't linking to the aircraft after binding, ensure the transmitter isn't too close during the linking process. Move it a few feet away, and disconnect and reconnect the flight battery to the aircraft. Also, check for large metal objects nearby and move the aircraft or transmitter away from them. Ensure the bind plug is removed after binding and that you've selected the correct model memory on your transmitter (if ModelMatch™ is used). Check and recharge or replace batteries if the charge is low. Rebind the aircraft to the transmitter to ensure the correct DSM protocol is used. Finally, ensure the remote receiver is connected and not damaged.
M
mcarrilloAug 1, 2025
How to fix Spektrum NX20 Transmitter not binding to aircraft?
- M
  Michael WilsonAug 1, 2025
  If your Spektrum Transmitter isn't binding to the aircraft, first ensure the transmitter isn't too close to the aircraft during the binding process; move it a few feet away and try again by disconnecting and reconnecting the flight battery. Check for any large metal objects nearby that could be interfering and move the aircraft or transmitter away. Make sure the bind plug is correctly installed in the bind port. Also, check and replace or recharge the batteries if they're low. If you're using an NX20 EU version transmitter, it's not compatible with DSM2 receivers.
M
maurice95Aug 6, 2025
What to do if Spektrum Receiver quits responding during operation?
- J
  Julie HinesAug 6, 2025
  If your Spektrum receiver quits responding during operation, it could be due to low battery voltage, so completely recharge the flight battery. Also, inspect the wires and connectors between the battery and receiver for any looseness or damage, and repair or replace them as necessary.
H
Haley FreemanAug 10, 2025
How to fix Spektrum Receiver losing its bind?
- S
  sarah52Aug 10, 2025
  If your Spektrum receiver loses its bind, it might be because the bind button was pressed before the transmitter was powered on. To resolve this, rebind the receiver by following the binding instructions.
B
Brenda AllenAug 14, 2025
Why Spektrum NX20 Transmitter has fades, losses, or holds during flight?
- A
  Amanda HicksAug 14, 2025
  If the flight log registers an undesirable number of fades, losses, or holds, or if the aircraft responds irregularly to controls when using your Spektrum Transmitter, try the following: * Reposition remote receivers to improve RF signal path diversity. * Check for and eliminate feedback from servos or motor systems to the ESC or receiver. * Check the aircraft's power draw and increase battery power, or decrease the power demand by installed systems. Ensure all aircraft batteries are fully charged and that the installed BEC for an electric aircraft is adequate for the power demand.
B
brian66Aug 18, 2025
What causes Spektrum Receiver to failsafe at short distance?
- S
  Stephen FrenchAug 18, 2025
  If the Spektrum receiver goes into failsafe mode a short distance away from the transmitter, ensure that the main and remote receivers are installed at least 2 inches (51mm) apart.
J
Jason WoodardAug 22, 2025
Why is Spektrum Receiver slowly blinking at landing?
- D
  Daniel SmithAug 22, 2025
  If your Spektrum receiver is slowly blinking at landing (DSM2 Only), check the battery voltage. Also, if the system was powered on and connected, then the receiver was powered off without powering off the transmitter, power off the transmitter when the receiver is powered off.

Summary

Introduction and Basic Setup

Understanding Special Language

Explains terms like WARNING, CAUTION, and NOTICE used in the manual for safety.

Preparation Before Transmitter Use

Covers warranty registration, general notes, and pilot safety precautions before operation.

Box Contents and Specifications

Lists included items and key technical specifications of the NX20 transmitter.

Basic Operation and Interface

Navigating the interface, understanding the main screen, and initial setup procedures.

Transmitter and Receiver Binding Process

Step-by-step guide on linking the transmitter to a receiver for operation.

System Setup and Configuration

Model Type Programming Guide

Guide to selecting model types (Airplane, Heli, Sail, Multi) and their impact on function menus.

System Setup Configuration

Setting up model-specific parameters like Model Select, Model Type, and Aircraft Type.

Channel Assignment Configuration

Assigning transmitter channels to controls and re-assigning receiver ports for custom setups.

Model Utilities and Management

Creating, deleting, copying, resetting, and sorting model files for efficient management.

Memory Card and USB Operations

Managing internal memory and external SD cards for updates, backups, and file transfers.

Updating Spektrum AirWare Software

Manual and automatic procedures for updating the transmitter's firmware via memory card or WiFi.

Core Transmitter Functions

Telemetry System Operation

Managing telemetry data, auto-configuration, and accessing sensor information.

Forward Programming Interface

Using the transmitter as an interface for programming connected receivers directly.

Trainer Functionality

Using wired and wireless trainer modes for instruction, including FPV setup.

Transmitter Settings Configuration

Adjusting display, sound, language, and other system-wide settings.

Servo Setup and Configuration

Setting servo travel, sub-trim, reverse, speed, balance, and naming.

Mixing Functions

Controlling one channel's input to affect multiple channels simultaneously.

Performing a Range Test

Reducing transmitter power for range checks to confirm RF link operation.

Model Type Specific Operations

Acro (Airplane) Specific Settings

Setup options specific to airplane models, including servo and mixing configurations.

Heli (Helicopter) Specific Settings

Setup options specific to helicopter models, including swashplate and pitch curves.

Sail (Sailplane) Specific Settings

Setup options specific to sailplane models, including wing/tail types and camber.

Multi (Multirotor) Specific Settings

Setup options specific to multirotor models, including camera axis and trim.

Physical Adjustments and Maintenance

Physical Transmitter Adjustments

Adjusting physical components like antenna, gimbals, sticks, and travel limits.

Throttle Ratchet and Smooth Tension Adjustment

Engaging or disengaging the ratchet or smooth tension on the throttle gimbal.

Transmitter Mode Conversion

Steps for mechanical and programming conversion between transmitter modes (1, 2, 3, 4).

Troubleshooting, Warranty, and Support

Troubleshooting Guide

Common problems, causes, and solutions for transmitter and aircraft connectivity issues.

1-Year Limited Warranty Information

Details warranty coverage, exclusions, remedies, and how to obtain service.

FCC and IC Compliance Information

Regulatory compliance statements, RF exposure guidelines, and contact information.

Spektrum NX20 Specifications

General

Modulation	DSM2, DSMX
Proper use	Airplane, Helicopter
Control type	Buttons, Lever
Product type	Remote control
Programmable	Yes
Compatibility	-
Product color	Black
Frequency band	2.4 GHz
Channels quantity	20 channels
Brand compatibility	Spektrum
Compatible memory cards	SD
Number of memory records	250
Battery voltage	3.7 V
Battery capacity	10500 mAh
Number of battery cells	1
Display diagonal	5 \
Display resolution	800 x 480 pixels
Cables included	USB Type-C