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Garmin G1000 Cockpit Reference Guide for Mooney M20M & M20R
33
SECTION 3 – AUDIO PANEL
Microphones
The GMA 1347 features six (6) different microphone
channeling modes:
COM1 MIC
COM2 MIC
COM3 MIC
COM 1/2 (Split COM)
PA
COM 1/2 and PA (Split COM and PA)
NOTE: A push-to-talk (PTT) switch must be
pressed to open the selected output channel.
Each audio panel can accept up to six (6) microphone
inputs, thus allowing for a two-person crew and up to
four (4) passenger intercom stations in the aircraft.
Mono/Stereo Headsets
The GMA 1347 can accommodate up to six (6) head-
sets (pilot, copilot and up to four (4) passengers).
NOTE: The use of stereo headsets is highly
recommended. However, if monaural headsets
are plugged into stereo jacks that do not each
have a switch installed, the unit will not be dam-
aged.
Use of a monaural headset in a stereo jack shorts the
right headset channel output to ground. Thus, a person
listening on a monaural headset only hears the left chan-
nel in both ears. If a monaural headset is used at one of
the passenger positions, any other passenger listening on
a stereo headset hears audio in the left ear only, unless the
headset has a mono/stereo switch and the latter is set to
mono.
In Configuration mode, headset audio level can be ad
-
justed above or below a nominal value for MUSIC 1, MUSIC
2, UNSWITCHED 1, UNSWITCHED 2, UNSWITCHED
3 and ALTITUDE WARNING. Please consult a Garmin-
authorized service center for additional information.
Unmuted/Unswitched Inputs
The unit provides four (4) unmuted/unswitched in-
puts that are always presented to the headsets or speakers
connected to the panel. These inputs are the following
aural warnings:
ALT warning
UNSWITCHED 1
UNSWITCHED 2
UNSWITCHED 3
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