I have a Dragon Link transmitter receiving inputs from a Taranis FrSky, with the dragonlink sending inputs to RC IN on my Pixhawk using SBUS. My ailerons have two servos which are designed to be connected together on one input via a Y Splitter cable. I can confirm that connecting directly to the receiver on my plane enables the aileron servos to turn in coordination together. However, when I connect the servos to my Pixhawk, if both servos are connected on the Y splitter cable, only one servo moves when I give aileron input. If I switch the cable around, or unplug one, the still-plugged-in servo moves the other aileron which was not moving before.
Am I missing something about my servos being somehow individually addressable? My understanding is they are simple PWM outputs from the Pixhawk. Is this some type of voltage issue on the Pixhawk with my splitter cable? I’ve searched around for this but haven’t seen anything on it.