Garmin GMA 347 - Manual (Page 5)

Garmin GMA 347 Pilot’s Guide 190-00325-00 Rev. B
3
Layout
Transceiver selection keys. Selects the COM
transmitter and associated receiver.
Split COM operation key. When active, the Pilot
uses the COM 1 transceiver and the Copilot uses
COM 2.
Selects telephone operation.
Selects cabin speaker. Press and hold 2 seconds
for PA mode. SPKR key blinks in PA mode.
Intercom isolation keys. Four modes
available.
COM Playback key. Pressing this key plays back
the most recent 2-1/2 minutes of received COM.
Marker Beacon System. Annunciators, Marker
Mute key, Marker Sense key and Hi Sense LED.
Marker Mute key also turns ON/OFF Music
Muting and halts COM playback.
Volume/Squelch: Rotating the left (Pilot) volume
knob controls the ON and OFF function. (Full CCW
detent is OFF) Pressing the left volume knob
toggles between manual and automatic squelch.
COM receiver keys. Pressing a COM receiver key
selects the receiver, which is heard in addition to
the selected transceiver. Pressing again deselects
the receiver.
Nav receiver keys. Pressing a Nav receiver key
selects the receiver. Pressing again deselects
the receiver.
Pulling the right volume knob controls passenger
volume, pushing in controls Copilot volume. Copilot
and passenger share the (outer) squelch knob.