190-01878-05 Rev. A
Garmin GMA 345 3-COM Pilot’s Guide
19
GMA 345 3-COM Audio Panel
PASSENGER MUTING
Press and hold
NAV2
to enable/disable passenger muting during COM
audio reception. The aural message “Passenger Mute Enabled/Disabled”
is heard.
SPEAKER
NOTE:
Speaker audio turns off in circumstances where aircraft power
falls below 11 volts.
All of the radios can be heard over the cabin speaker. Pressing the
SPKR
Key selects and deselects the cabin speaker. Speaker audio is muted when
the PTT is pressed. Certain aural alerts and warnings (autopilot, traffic,
altitude) are always heard on the speaker, even when the speaker is not
selected.
Speaker Key
P
assenger
a
ddress
M
ode
(Pa M
ode
)
Press and hold the
SPKR
Key for one second to initiate Passenger
Address Mode. PA Mode is annunciated by a rapid blinking of the
SPKR annunciator. When in PA Mode the crew can use the PTT “Push-
to-Talk” button to deliver announcements over the speaker and to the
passenger headsets.
s
PliT
-Pa M
ode
During Split-PA Mode the pilot can continue to use COM1 or COM2
for transmission while the copilot delivers PA announcements. To
initiate Split-PA Mode, first enter Split-COM Mode by pressing any two
MIC
Keys simultaneously, then press and hold the
SPKR
Key for one
second.
Summary of Contents for GMA 345 3-COM
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