Garmin G1000 audio panel
TM
G1000
audio panel pilot’s guide
Record of Revisions
Revision Date of Revision Revision Page Range Description
A 12/01/04 6A-1 – 6A-17 Initial release.
Garmin G1000 Audio Panel Pilot’s Guide 190-00378-02 Rev. A
INTRODUCTION
6A.1 INTRODUCTION
This manual provides the pilot with a description of
the GMA 1347 and its operating instructions.
The Garmin GMA 1347 is an audio control panel and
marker beacon system. Pressing the audio panel keys
controls audio selection of COM, NAV, telephone and in
tercom. LED annunciators indicate when a key function
is selected.
NOTE: This audio panel is intended to be used
only as part of the G1000 Integrated Cockpit
System.
The GMA 1347 includes a six-position intercom system (ICS) with electronic cabin noise de-emphasis and
two stereo music inputs. Separate knobs for the pilot and
copilot/passenger control intercom audio level. The intercom provides four selectable modes of isolation (All,
Crew, Pilot, Copilot).
A cabin speaker is available to listen to selected aircraft
radios. MASQ (Master Avionics Squelch) processing re
duces ambient noise from the avionics inputs.
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The GMA 1347 provides a digital recorder that can
play back up to two and a half minutes of COM audio.
Recording is automatic when a COM signal is received.
Playback is controlled by pressing the PLAY key. Play-
back can be stopped by pressing the MKR/MUTE key.
The unit controls marker beacon receiver audio and
features marker beacon audio muting.
As part of the G1000 Integrated Cockpit System, the
GMA 1347 also operates the display reversionary mode.
Two GMA 1347 audio panels can be mounted in an
aircraft. In dual panel installations, two (2) units can be
connected to the same radios.
CAUTION: When the GMA 1347 Audio panel is
turned OFF or is inoperative, certain autopilots
are affected. No warning tone is supplied when
the autopilot disengages and the middle marker
sense signal is not supplied.
Each microphone input has an automatic squelch
threshold. Manual squelch is available by pressing the
MAN SQ key.
Garmin G1000 Audio Panel Pilot’s Guide190-00378-02 Rev. A
6A-1
DESCRIPTION
6A.2 UNIT DESCRIPTION
The GMA 1347 features three (3) major groups of keys
as shown in Figure 6A.2.1:
• Communication keys
• Navigation keys
• Intercom system (ICS) keys
Each key is labeled to indicate the name of the func
tion. The triangular key annunciator above the keys are
white when illuminated.
The knobs at the bottom of the unit control ICS volume
and squelch threshold levels. The
volume/squelch level for the pilot. The large knob adjusts the volume/squelch level for the copilot/passenger.
The red DISPLAY BACKUP button below the dual vol-
ume/squelch knob controls reversionary mode selection.
small knob adjusts the
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FRONT PANEL CONTROLS
• Transceiver audio selector keys
(COM1, COM2, COM3)
• Transmitter (audio/mic) selection keys
(COM1 MIC, COM2 MIC, COM3 MIC)
• Split COM key
(COM 1/2)
• Dedicated telephone interface key
(TEL)
• Passenger address key
(PA)
• Speaker key
(SPKR)
• Marker beacon receiver audio select/mute key
(MKR/MUTE)
• Marker beacon receiver high sensitivity key
(HI SENS)
• Aircraft radio audio selector keys
(NAV1, NAV2, ADF, DME, AUX)
• Intercom manual squelch key
(MAN SQ)
• Digital recording playback key
(PLAY)
• Intercom system (ICS) isolation keys
(PILOT, COPLT)
• Volume/squelch knob
(VOL/SQ)
• Reversionary mode button
(DISPLAY BACKUP)
Garmin G1000 Audio Panel Pilot’s Guide 190-00378-02 Rev. A6A-2
DESCRIPTION
Transmitters
Split COM
Passenger Address
Marker Beacon/Mute
Navigation Radio Audio
Manual Squelch
Transceiver Audio
Telephone
Speaker
Marker Beacon Signal Sensitivity
Navigation Radio Audio
Digital Recording Playback
ICS Isolation
VOL/SQ
VOL Annunciation
Figure 6A.2.1 Front Panel Controls
Garmin G1000 Audio Panel Pilot’s Guide190-00378-02 Rev. A
SQ Annunciation
Reversionary Mode Control
6A-3
DESCRIPTION
TRANSCEIVERS
The GMA 1347 handles three different transceivers:
• COM1 MIC
• COM2 MIC
• COM3 MIC
NOTE: A push-to-talk (PTT) switch must be
pressed to transmit on the selected radio.
Each audio panel can accept up to six (6) microphone
inputs, 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) headsets, pilot, copilot and up to four (4) passengers.
NOTE: The use of stereo headsets is highly rec-
ommended.
UNMUTED/UNSWITCHED INPUTS
The unit provides four (4) unmuted/unswitched inputs that are always present on the headsets or speaker.
These inputs are the following aural warnings:
• ALTITUDE WARNING
• UNSWITCHED 1
• UNSWITCHED 2
• UNSWITCHED 3
Use of a monaural headset in a stereo jack shorts the
right headset channel output to ground. A person listen
ing on a monaural headset hears only the left channel 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 that is set to mono.
Garmin G1000 Audio Panel Pilot’s Guide 190-00378-02 Rev. A6A-4
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