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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
Serial Protocol
(Maximum channels)
AIL
ELE RUD AIL2 ELE2 MODE GAIN AUX1 AUX2
PPM Receiver
(16)
CH1 CH2 CH4 CH6 None CH5 None CH3 None
Futaba S.Bus / WFLY WBUS
(16)
CH1 CH2 CH4 CH6 None CH5 None CH3 None
FrSky / RadioLink SBUS
(16)
CH1 CH2 CH4 CH6 None CH5 None CH3 None
Spektrum DSM2/X 1024 Satellite
(7)
CH2 CH3 CH4 CH6 None CH5 None CH1 None
Spektrum DSM2/X 2048 Satellite
(9)
CH2 CH3 CH4 CH6 None CH5 None CH1 None
Spektrum SRXL
(16)
CH2 CH3 CH4 CH6 None CH5 None CH1 None
Multiplex SRXL/JR XBUS Mode B
(16)
CH2 CH3 CH4 CH6 None CH5 None CH1 None
Graupner SUMD
(16)
CH2 CH3 CH4 CH6 None CH5 None CH1 None
FlySky iBUS
(10)
CH1 CH2 CH4 CH6 None CH5 None Ch3 None
