Hi there.
I seem to have exactly the same problem
I have connected Walkera's 22E remote using same SmartPropoPlus interface and first six channels inputs are all over the place when I try to calibrate...
I am using mono 3.5mm jack on one side and that S-Video on controller's side. I can play with positive/negative polarity (and it really depends on how I wire ground and signal - if I select manual and wrong polarity I get nothing). Also, I have tried sound recorder and what I am getting there kind of looks OK (I wouldn't know if it is right or not). It looks like as a signal.
I have tried Generic PPM and that is (I think) only place where I am getting something.
Does anyone have any idea what am I doing incorrectly or how to debug it further?
There is one more small detail I would like to keep hidden at the moment so nobody is biased and/or mislead by it
