Toys / RC Components
User Manual for FrSky 2.4GHz Two-Way Radio System
Comprehensive user guide for the FrSky 2.4GHz Two-Way Radio System. Includes installation, binding procedures, range check instructions, LED status indicators, and firmware upgrade steps for DFT and DJT modules.
Quick answers from the manual
Quick answer
- The FrSky 2.4GHz Two-Way Radio System allows for two-way communication between transmitter and receiver, enabling telemetry like voltage and temperature monitoring. Setup involves installing the module, binding the receiver, and performing a range check. p. 1, 4, 5
Key actions
- Binding Receiver: Turn on transmitter in binding mode, connect battery to receiver while holding receiver button. p. 4
First start
- Install module, set MODE switch, bind receiver, perform range check. p. 3, 4, 5
Problems and fixes
Low RSSI Alarm
Check antenna placement and distance from transmitter.
p. 5, 6Maintenance and reset
- Firmware can be updated via RS232 cable and PC software. p. 8
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Receiver Range | 1.5km | Ground range | p. 2 |
Where to find it in the PDF
- Transmitter/Receiver Models p. 1
- Setup and Binding p. 3, 4
- Range Check p. 5
- LED Status p. 7, 8
Table of contents
Quick Guide
This manual covers the setup and operation of the FrSky 2.4GHz Two-Way Radio System, including the DFT and DJT transmitter modules and compatible receivers like the D8R and V8R series. The system provides a return link for monitoring telemetry data such as voltage and temperature.
Installation
To install the transmitting module:
- Remove the original transmitting module from your RC transmitter.
- Insert the FrSky 2.4GHz module into the module port.
- Screw on the transmitting antenna.
- Set the MODE switch to the correct position based on the table in the manual (e.g., Two-way Mode: Switch 1 OFF, Switch 2 OFF).
Binding Procedure
- Turn on your transmitter and switch to PPM mode.
- Turn on the transmitter while holding the programming button. The RED LED will flash, indicating it is ready to bind.
- Connect the battery to the receiver while holding the receiver's button.
- Turn off both devices to finish the binding procedure.
- Turn on the transmitter, then connect the receiver battery. The Green LED on the receiver indicates it is receiving commands.
Range Check
Always perform a range check before flying:
- Place the model at least 60cm above non-metal ground.
- Ensure antennas are apart and vertical.
- Hold the "F/S Range" button for 4 seconds to enter Range Check Mode (RED LED turns off).
- Walk at least 30 meters away while operating controls to confirm functionality.
- Press the "F/S Range" button for 1-4 seconds to exit Range Check Mode.
Safety and Alarms
The system provides RSSI (Received Signal Strength Indication) alarms:
- Red: Very far from Tx (Constant 3 beeps).
- Orange: Far from Tx (Constant 2 beeps).
- Yellow: General (1 beep).
- Green: OK (No beep).
Firmware Upgrade
To upgrade the firmware:
- Set the module to Upgrade Mode.
- Connect the module to a PC using an RS232 cable.
- Start the upgrade software on your PC.
- Select the file and port, then press Download.
Manufacturer information
FrSky Electronic Co., Ltd.
Practical help
Common problems
Receiver not binding
Ensure the transmitter is in binding mode (RED LED flashing) and the receiver button is held down while connecting the battery.
Low signal alarm
Check antenna orientation (90 degrees apart) and ensure they are not obstructed by metal, carbon fiber, or battery packs.
Before use
- Check MODE switch position on the transmitter module
- Ensure antennas are oriented 90 degrees apart
- Perform a range check before every flying session
- Verify battery voltage is within 4.0V-7.2V for the receiver
- Ensure transmitter is in PPM mode
Specs in practice
- Operating Voltage (Rx)
- 4.0V-7.2V
- Operating Voltage (Tx)
- 6.0V-13.0V
Model compatibility
- DFT module compatible with Futaba, Hitec, and WFLY transmitters
- DJT module compatible with JR transmitters
- V8 receivers work with DFT/DJT in receive-only mode
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.