7.7.6 COMMUNICATION AND NAVIGATION
7.7.6.1 AUDIO PANEL
An audio panel is installed on top of the avionics rack to distribute audio to the
crew. The Audio Panel includes an intercom system (ICS), a marker beacon
receiver, a COM clearance recorder, USB power jack, and Bluetooth® audio.
Ambient noise from the aircraft radios is reduced by Avionics Squelch (ASQ).
When no audio is detected, ASQ processing further reduces the amount of
background noise. Intercom squelch threshold adjustments are handled
automatically by the system.
Pushbutton keys control audio selection. When a key is selected, a green
annunciator on the key is illuminated. Annunciator brightness is adjusted
automatically by photocell dimming.
Key brightness is adjusted by the radio dimming bus control. Three Aux inputs
are available for additional avionics or audio devices.
Basic functionalities are listed below. For more detail, Refer to the GMA 345
Pilot’s Guide referenced in section 1.8.
To Next Page
