Ariel Rocholl wrote: > I agree the signal on the servo is PWM, but the FM transmitted is PPM > coded - but this signal is not the one you care about when you use the > one already decoded by the receiver. I'm not sure I understand the distinction between PWM and PPM you guys are making here. AFAIK, PWM stands for "pulse width modulation" and this doesn't say what type of information is encoded ("modulated") in the pulse width. See also . In that sense, any pulse signal of constant frequency that has the information encoded in the pulse width is a PWM signal -- no matter whether the encoded information is position, voltage, speed, motor current, etc. Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist