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G1000TM
audio panel pilot’s guide
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Date of Revision |
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Description |
A |
12/01/04 |
6A-1 – 6A-17 |
Initial release. |
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Garmin G1000 Audio Panel Pilot’s Guide |
190-00378-02 Rev.A |
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 intercom. 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 reduces ambient noise from the avionics inputs.
Each microphone input has an automatic squelch threshold. Manual squelch is available by pressing the
MAN SQ key.
INTRODUCTION
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. Playback 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.
190-00378-02 Rev.A |
Garmin G1000 Audio Panel Pilot’s Guide |
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 function. The triangular key annunciator above the keys are white when illuminated.
TheknobsatthebottomoftheunitcontrolICSvolume and squelch threshold levels. The smallknob adjusts 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 volume/squelch knob controls reversionary mode selection.
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)
6A-2 |
Garmin G1000 Audio Panel Pilot’s Guide |
190-00378-02 Rev.A |
DESCRIPTION
Transmitters |
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Transceiver Audio |
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Telephone |
Split COM |
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Passenger Address |
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Speaker |
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Marker Beacon/Mute |
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Marker Beacon Signal Sensitivity |
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Navigation Radio Audio |
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Navigation Radio Audio |
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Manual Squelch |
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Digital Recording Playback |
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VOL/SQ |
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ICS Isolation |
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VOL Annunciation |
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SQ Annunciation |
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Reversionary Mode Control |
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Figure 6A.2.1 Front Panel Controls
190-00378-02 Rev.A |
Garmin G1000 Audio Panel Pilot’s Guide |
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 recommended.
Use of a monaural headset in a stereo jack shorts the right headset channel output to ground. A person listening 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.
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
6A-4 |
Garmin G1000 Audio Panel Pilot’s Guide |
190-00378-02 Rev.A |
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