Check of audio devices
VHF radios should issue noise in loudspeaker or headphones, once a radio
VHF radio is switched on by rotating its VOLUME knob clockwise. You should hear noise after. If not, check computer volume level
Radio should be able to record voice from the microphone or headphones.
Go to Start->Settings->Control panel->Sounds and Audio Devices->Audio-> Sound recording->Volume.The panel appeared should look like this :
- microphone volume should be high enough and "Microphone" should be checked.
Check if microphone is really working by using Windows Sound recorder.
Go to Start->Programs->Accessories->Entertainment->Sound Recorder.
Click on the button marked by a red point (recording) and speak something
the the microphone. The screen should show voice samples like that :