23SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Bind
The Bind menu enables you to bind a transmitter and receiver
without powering off the transmitter. This menu is helpful if you are
programming a model and need to bind the receiver for failsafe
positions.
See your receiver manual for information about setting failsafe
positions.
Serial Port Setup
Serial Output
The Serial Output menu manages serial port usage on the back of
the transmitter. This port is designed to communicate with external
RF devices using digital communication protocols. The NX20
includes the SRXL2 as well as the CRFS protocols for compatibility
with the TBS Cross Fire and Cross Fire 2. In addition, the NX20 is
engineered to deliver a 9.5V power supply for external devices.
Any changes made in this menu will not be applied until the RF is
re-enabled.
Serial Port Protocol
Scroll to the Protocol. Select Inhibit, SRXL2, Cross Fire 1 or
Cross Fire 2. Selecting the Cross Fire 1 or Cross Fire 2 options
will enable the CRFS data stream. Connecting the Cross Fire
system requires the Cross Fire serial port adaptor (SPMA3090,
not included). Consult the manufacturer’s manual for use of any
external RF device. Horizon Hobby does not provide support for
external RF devices connected to the NX20 transmitter.
Spektrum RF
Select Active to transmit Spektrum RF along with the data stream
coming from the data port when other protocols are selected. The
switch defaults to Active when the Protocol is set to Inhibit.
External Power (9.5v)
Select On when using an external power source for the external
device. Select Off to use the internal power of the NX20 to power
the device.
IMPORTANT: Battery use will be affected and the expected
use time will decrease when using this option to power external
devices.
Crossfire Telemetry
Crossfire telemetry is supported through Auto-Config in the
telemetry menu, although not all crossfire telemetry sensors
are supported. When Crossfire is connected with telemetry the
RF indicator on the main screen will show the Crossfire signal
strength. Color coding based on telemetry data may also be
configured to use information from your Crossfire.
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