User's Manual

FinePrint Software, LLC
16 Napier Lane
San Francisco, CA 94133
Tel: [phone]
Fax: [phone]
www.fineprint.com
Manual of Two-Way Radio System www.FrSky-rc.com P1of7
2.4GHz Two-Way Radio System
1. Introduction:
The Two-way Radio System developed by FrSky provides an additional
return link that would be used for monitoring the Rx’s voltage, temperature,
location, speed and so on.
2. Overviews
2.1 Transmitter modules:
a) Model: DFT
Compatible with the following transmitters:
Futaba: 3PM, 3PK, 7U, 8U, 8J, 9C, 9Z, 10C, FN series, T10C, FC-18,
FC-28.
Hitec: Optic 6, Eclipse 7, Prism 7.
WFLY: WFT09, WFT08.
b) Model: DJT
Compatible with the following transmitters:
JR: 347/388/783/U8/PCM10/PCM10S/PCM10SX/
PCM10IIS/8103/J9303/MX-22/MX-24S/PX/9XII.
2.2 Receiver module:
a) Model: D8R, D8RHV
Compatible with FrSky Two Way module DFT/DJT.
b) Model: V8R, V8RHV, V8R7, V8R7HV, V8R4
V8 receivers work with DFT/DJT, just in receive-only mode.
3. Features
a) Advanced Continuous Channel Shifting Technology (ACCST
SYSTEM) achieves high reliable link in interference rich
environments.
b) Easy to bind and instant link-up.
c) Excellent reboot times.
d) All channels failsafe.
e)
Quick r
esponse.
Manual of Two-Way Radio System www.FrSky-rc.com P2of7
f) Very smooth servo movement.
g) Alarm on events of receiver (low battery voltages, poor reception,
etc.)
h) Error-free link, by using 48bits CRC algorithm.
i) Low power consumption.
j) True two-antenna diversity.
k) Firmware upgradable.
4. Function of Two Way communication
a) Two way communication between receiver and transmitter
b) Receiver is able to accept 2 analog inputs, which can be used to monitor
battery voltage, temperature sensor, etc., and transfer them to
transmitter. Users can set the Alarm Point of these analog voltages, when
exceed or below these points, sound alarm is presented.
c) Receiver is able to accept serial data streams from simple 3-wire RS232
port, such information as GPS, altitude, and user developed data can be
transferred to Tx without error, and presented at the RS232 port on the
Tx.
5. Specifications
5.1 Receiver specifications:
Model: D8R
Weight: 16.2g
Dimension: 54*27*17mm
Operating Voltage Range: 4.0V-7.2V
Operating Current: 100mA
Specified Range: 1.5km (Ground Range)
Resolution: 11bit (3072)
Latency: 22ms
Number of Channels: 8CH
Analog voltage: 0~3.3V
5.2 Transmitter module specifications:
Model: DFT, DJT
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