Originally Posted by Teamsherman
Yeah I thought the signal from ppm out to RL would be diminished, but even so, the RL puts out its full strength regardless of how weak or strong the signal comes into it. It's just like using a ten metre headphone extension cable, the sound down the other end was zero difference to using the headphones directly to the iPod.
This is currently working for you, which is good to hear, but it's not recommended. The PPM signal is 'single-ended' (rather that differential) and the cable you're using is almost certainly not twisted either, both these facts mean using long cable runs will result in the signal becoming highly susceptible to interference from external sources, e.g. a transmitter.
The analogy of comparing it with an analogue audio signal is not applicable either, as were there noise on the audio signal you probably wouldn't notice it and even if you did, there's no consequence anyway. Any interference picked up by your digital extension cable and you're going down - or at least going into fail-safe before the interference goes and you recover.