www.frsky-rc.com
05/01/12
5) Walk away from the model while simultaneously operating the controls on the transmitter, confirming that all
controls operate normally to a distance of at least 30 meters (~30 yds).
6) Press the F/S button of the transmitter module for 1S-4S to exit range check mode, RED LED will be back on,
indicating normal operation is back.
2.3 Setting failsafe
Failsafe is a useful feature in which all controls move to a preset position whenever the control signal is lost for a
period of time. D8R-II plus supports failsafe function for all channels.
Follow the steps below to set failsafe positions for each channel:
1) Bind the receiver first and turn on both the transmitter and the receiver;
2) Move the controls to the desired failsafe position for all channels;
3) Press briefly the F/S button on the receiver (less than 1 second).
The transmitter module will make a long “beep”,
indicating the failsafe position has been set in the receiver.
To disable the failsafe function, re-bind the receiver.
2.4 LED status
RED LED
GREEN LED
Mode
On
Dimly On
Normal Operation
Blinking Off
No
Signal
Blinking On
Binding
Successful
2.5 Pins definition for side ports
It should be noted that 3.3V only has a limited driving current (1~10mA), it should not be used for driving a MPU.
2.5.1
Two external analog telemetry ports (A1&A2) and one digital data-stream port (Rx).
G G G
Tx X X
Rx A2 A1
Rx: input to receiver, RS232 level, connect with FrSky sensor hub
A2 (external): max voltage 3.3V, division ratio 1:1
A1 (external): max voltage 3.3V, division ratio 1:1
2.5.2 When side port pins of A1 and X are connected by the jumper, A1 will change from external analog
telemetry port to internal built-in battery voltage sensor.
G G G
Tx X X
Rx A2 A1
Rx: input to receiver, RS232 level, connect with FrSky sensor hub
A2 (external): max voltage 3.3V, division ratio 1:1
A1 (internal): max voltage 3.3V, division ratio 4:1
3. How to switch between two PPM modes
Turn the transmitter off, connect the battery to the receiver, press the F/S button of the receiver for 6 seconds and
then release. The red LED will flash fast in HS mode and slowly in FS mode.
The mode alternates each time this procedure is done.
Warning: HS mode is only applied for high-speed digital servos.
Other servos should select FS mode, otherwise servos will get hot and may burn out.
