Binding Procedure; Range Check; Safe Flying Distance - FrSky XJT Instruction Manual

Smart Port (S. Port) is a signal wire full duplex digital transmission interface developed by FrSky Electronic
Co., Ltd. All products enabled with Smart Port (including XJT module, X8R receiver, new hub less sensors, new Smart
Dashboard, etc), serial port user data and other user input/output devices can be connected without limitations for
numbers or sequences at a high transmission speed.
Binding is the process of uniquely associating a particular receiver to a transmitter module. A transmitter module can be
bound to multiple receivers (not to be used simultaneously). A receiver can only be bound to one transmitter module.
Follow the steps below to finish the binding procedure.
1. Turn on the transmitter while holding the F/S button on the XJT module (see Mode and Compatibility table
above). Release the button. The RED LED on the XJT module will flash, indicating the transmitter is ready to
bind to the receiver.
2. Connect the battery to the receiver while holding the F/S button on the receiver. The RED LED on the receiver
will flash, indicating the binding process is completed (please refer to the corresponding receiver's instruction
manual for details)
3. Turn off both the transmitter and the receiver.
4. Turn on the transmitter and connect the battery. The RED LED on the receiver indicates the receiver is
receiving commands from the transmitter. The receiver/transmitter module binding will not have to be
repeated, unless one of the two is replaced.
Note: After binding procedure is completed, recycle the power and check if the receiver is really under control by linked
transmitter.
A pre flight range check should be done before each flying session. Reflections from nearby metal fences, concrete
buildings or trees can cause loss of signal both during range check and during the flight.
Follow the steps below to perform the range check.
1. Place the model at least 60cm (two feet) above non metal contaminated ground (e.g. on a wooden bench).
2. The receiver antennas should be separated in the model, and do not touch the ground.
3. The module antenna should be in a vertical position.
4. Turn on the transmitter and the receiver, press the F/S button on the XJT module for 4 seconds to enter range
check mode, the RED LED will be off, GREEN LED will flash rapidly. The effective distance will be decreased to
1/30 of full range.
5. Walk away from the model while simultaneously operating the controls on the transmitter to confirm all
controls' normal operation (please refer to the corresponding receiver's instruction manual for details).
6. Press the F/S button on the XJT module for 1~4 seconds to exit range check mode, RED LED will be back on,
indicating normal operation is back.
FrSky telemetry system has a feature to return the Received Signal Strength Indication (RSSI) of the receiver to the
transmitter. The transmitter develops an internal voltage representing the receiver signal strength. Alarms are
programmed in the transmitter to warn the pilot when the model is nearing maximum control range. See the table below
for reference.
Number Beep Alarming
0
1 Single Beep
2 Constant double Beeps
3 Constant triple Beeps
Constant Beeps

Binding Procedure

Safe Flying Distance

No Beep
The module antenna is broken, or does not have intact contact, etc.

Range Check

Meaning
The signal strength is strong
The signal strength is adequate
The model is far, but safe range
The model in near maximum range
2
www.frsky rc.com
05/02/13