No Radio. Just telemetry

Hi Everyone. Im starting out with pixhawk. Drone already assembled. I have no radio controller and no Joystick at the moment. How can I pass the MP radio calibration with only the 433Mhz 3DR radios ? Can I download an app to act like a radio transmitter ?

What would be the point of passing Radio Calibration in Mission Planner if you don’t have a Radio?

enter RCx_MAX RCx_MIN and RCx_TRIM for each channel in the parameters