MMDVM repeater board, adjust TX level.

Tuning TX level on power hotspot.Repeater board that I use as a power hotspot. Motorola GM340 UHF on C4FM only. I used a cheap blue SDR-USB receiver. There is no need to adjust anything on the raspberry. In the calibration mode, a 1200Hz tone is played and the middle spike is visually lowered to the lowest point with the potentiometer, and that's it. I used the DMR mode because it's easier to visually see the spike that descends to the lowest point. After that I turned off DMR and turned on C4FM