Airtronics to Futaba Buddy Cord
Hi, Dennis,
To give an example : the buddy box connection on a Graupner MC12 as slave gives me a positive PPM-signal, which has to be inverted by a simple signal inverter to be understood by my Futaba/robbe radio FC18 as master. My Futaba/Robbe gives me a negative PPM-signal that must be inverted when used as slave with a MC12 as master.
But both radios can be used with the same receivers separately (being in Europe any Multiplex, JR, Graupner, Futaba, Hitec, Jeti, GWS, Act, Simprop, ...).
That's why I guess the negativie and positive shift is about HF-signal frequency shift and NOT about the PPM-code.
Any professional help??
Olivier