RE: What does PCM mean on a transmitter?
PCM - Pulse Code Modulation
PPM - pulse position modulation
Essentially, it is a different method of modulating the signal between the transmitter and the reciever. PCM is a digital signal that is supposedly more resistant to interference from non-RC sources. There's and excellent discussion here[link]http://www.aerodesign.de/peter/2000/PCM/PCM_PPM_eng.html[/link]
Brad