I was wondering if you could help me with my issue, so I have the same transmitter and receiver as you and i also purchased a PPM encoder. (https://www.amazon.com/gp/product/B019V59KCS/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1) the system seems to be working well but when I run mission planner and try to calibrate the radio it displays 16 RC channels and only calibrates RC 1-9 and RC 10-16 do not calibrate. The other issue is that i don’t think it sees those channels since it doesn’t show a green bar it has them in a grey color. Then when I try to arm the quad copter the mission planner displays a Prearm: 16 error.
Any idea of how i could solve this issue?