It's too soon for me to ask, but is this going for
a PPM signal consists of a long (around 4 - 5 mS) HIGH pulse as sync pulse and then channel pulses of 1 - 2 mS separated by 300 microseconds LOW pulses. Pulse period of a single channel consists of its corresponding HIGH pulse plus 300 microseconds.
?
Sounds like positive pulses, easy enough. The thread that quote came from is issuing one PPM train every 50 milliseconds.
a7