- ✓Microphone input : tested with RSP1A
- ✓Speaker : tested by tuning to FM broadcast band
- ✓Programming : tested with Chirp
- TNC connection :
- ✓PC receiving audio : correct volume setting of the radio is crucial. Use audacity to tune the volume knob to avoid over-steering the laptop's audio input.
- ✓PC sending audio : PC volume must be adjusted here as well.
- ✓Pulling CN6.5 to GND enables the transmitter
So all functionality works as expected!