0 channels detected frsky r9 slim + receiver,and pixhawk4 fmu v5

#1

hello has anyone connected the frsky r9 + receiver to the pixhawk4 v5 controller or know how. when i try to configure using q ground control i get 0 channels detected. must i use a ppm encoder, the radio i’m using is frsky Qx7,I was able to get x8r receiver to detect but since i last up graded that not being detected either, but i’m able to configure both receivers in the joy stick set up,THANK YOU FOR ANY HELP

#2

THANK EVERY ONE involved all channels and switches are detected using Taranis r9 slim + receiver. reinstalled upgrade went back to radio set up and all is well THANK YOU