RE: Difference between FM and PCM
Xjet, do you realize you just said "a real confusing jumble" is "understandable"? Like my wiring inside my planes, an understandable jumble, Hah!
Matt, you're right, I said Phase Shift Keying and should have said Frequency Shift Keying. I don't know of any hobby R/C systems using PSK and doubt they exist due to the standard (cheap) components for FSK/FM that work so well. The main thing is it's not music type FM. Maybe some of the UAV systems use PSK?
Harry, you probably just shot down daMan who just spent a whole lot of dough on digital servoes. Reminds me of an explanation of how music CDs work that I saw in a newspaper: "The music is encoded as tiny microscopic holes on the surface of the CD and where there are holes, there's music, and where there are no holes, there's no music." (Get it, binary music! )