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Single-line Receiver
A3S4 supports PPM and multi-protocol digital serial receivers which allows you to connect the receiver
to the gyro with one single wire on the slot [Serial RX/M]. When using single-line receivers, 2 auxiliary
pass-through channels (AUX1 and AUX2) are available which can be used to output the expected
channels of the receiver directly. By default, AUX1 is always assigned to Throttle and applies to OUT5,
while AUX2 is disabled. Depending upon the receiver type selected, A3S4 uses the preset channel
assignment to recognize the channels from the receiver. Refer to the table below and check if your radio
transmits the channels in the correct order. After each time you have changed the receiver type the current
channel settings will be reset to the default. Choose “None” for those channels you do not use.
Table 1: Serial Receiver Protocols Supported and Default Channel Assignment