Using XP and a Futaba with PCM I have had a good stable input for FMS but I can't get a stable input under PPM with either the Futaba or my new DX7. There is a signal showing with winscope and I have tried all input 'volumes'. The symptoms are a very twitchy/jumpy control signal which makes the SPP calibrating bars jump up and down at random.
Looking at the winscope signal, should I be able to get it to lock? I can't find a trigger that locks the signal. There is also ringing showing at the top and bottom of each pulse. Is this normal?
Any ideas on how to get a stable PPM signal welcome.
Lindsay.