i have problems with the microphone and i can't get rid of it by adjusting the squelch.
What problems exactly?
The symptoms of the mic gain being set too high are:
- distorted or poor quality sound when you speak
- volume of your voice being louder than other passengers (or, if you turn down your headset volume, everyone else sounds quiet)
I guess you could also find it difficult to set the squelch properly, particularly if there's a lot of cockpit noise.
Mark