Flightcom iNova User Manual page 12

If you have difficulty transmitting on the radio
Is the pilot's headset plugged into the pilot's jacks on the intercom? Distorted sidetone
is related to improper shielding of the aircraft antenna cable. Usually your transmissions
are received clearly despite the distorted sidetone. If the copilot's transmission is not
clear, check that the copilot transmit cable is plugged in correctly and that the plugs are
clean. Insert the 3.5 mm plug fully into the intercom jack and rotate it several times to
remove any corrosion from the jack.
If the unit isn't loud enough or parts of your sentences are broken
Place the microphone as close to your lips as possible. Make sure the squelch is not
adjusted too high. While no one is talking, slowly rotate the squelch control clockwise
until the background noise disappears. Do not turn the knob any further than necessary.
Good headsets make a big difference here. Not all aviation headsets function the same
and you may find that one brand or model puts out a higher signal than another.
If the background noise level is too high while you are speaking
The problem here is with the microphone, not the intercom. Make sure you are using
a good quality noise canceling microphone and that you have it oriented correctly
and no more than 1/8 inch away from your lips.
If a high pitch whine is always present
It may be coming from the turn-and-bank indicator or other electric gyro. Try connecting
the power lead to a different source or use the intercom on battery power.