User Manual

www.frsky-rc.com
28/03/2011
9.3
The pin definition on the transmitter telemetry port is as shown in the table below
RXD Input to Transmitter module
TXD Output from Transmitter module
+5V Unregulated voltage
GND Ground
9.4 A photo of the DFT transmitter with the telemetry connector pins is shown here
10 LED Status
10.1 LED status on Transmitter module
RED LED on and GREEN LED flashing: Normal Operating Mode.
RED LED off and GREEN LED flashing: Range Check Mode.
RED LED flashing GREEN LED Off: Binding Mode.
10.2 LED status on Receiver
RED LED on and GREEN LED Dim: Normal Operating Mode.
RED LED flashing and GREEN LED off: No Signal.
RED LED flashing and GREEN LED on: Binding OK.
11 Firmware Upgrade
FrSky has developed a mechanism to allow firmware upgrade of these radios. This allows the user to
upgrade to new version of software as soon as it’s available.
11.1 The upgrade steps are as follows
• Download the new firmware and upgrade loader from the FrSky web site.
• Set the FrSky module to Upgrade Mode (See section 6.1.1.4).
• Connect the module to a PC with a RS232 cable (USB Version is available from FrSky).
• Start Upgrade software on PC.
• Select file and corresponding port.
• After the Serial Number is retrieved by the program press “Download.”
• After the progress bar reached 100% the software of the module is updated.
12 How to switch between two PPM modes
• Turn the transmitter off and turn on the receiver.
• Press the F/S button of receiver for 6 seconds and then release.
• The red LED will then flash fast when in HS Mode and slow in FS Mode.
• Repeat the steps to alternate back to the other mode.
•
Note: The receivers are shipped preset to the Full Speed (FS) mode for analog servos. Use the High Speed
(HS) mode for digital servos only.
5
Warning HS mode may damage analog servos.