Detailed instructions for use are in the User's Guide.
[. . . ] The intercom provides four selectable modes of isolation (All, Crew, Pilot, Copilot). MASQ (Master Avionics Squelch) processing reduces ambient noise from the avionics inputs. Manual squelch is available by pressing the MAN SQ key.
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. [. . . ] Refer to Table 6A. 3. 1 for a summary of the marker beacon signal characteristics. When the MKR/MUTE key is selected, the annunciator light illuminates and the audio signal can be heard over the speaker or headsets during marker reception.
Marker Beacon Signal Sensitivity
The HI SENS key can be pressed for increased marker beacon signal sensitivity. The HI SENS function is used to receive an earlier indication of nearing a marker during an approach.
Figure 6A. 3. 2 Marker Beacon
190-00378-02 Rev. A
Garmin G1000 Audio Panel Pilot's Guide
6A-7
OPERATION
Beacon Outer Marker Middle Marker Airway/Inner Marker
Audio Frequency 400 Hz 1, 300 Hz 3, 000 Hz
Audio Keying ------ ·--·-- ····
Rate 2 dashes per second 95 dot-dash combinations per minute 6 dots per second
Lamp Color Blue Amber White
Table 6A. 3. 1 Marker Beacon Signal Characteristics
Inner Marker
Middle Marker
Outer Marker
Figure 6A. 3. 3 Marker Beacon Signal Indicator Lights on the PFD
6A-8
Garmin G1000 Audio Panel Pilot's Guide
190-00378-02 Rev. A
OPERATION
NAVIGATION RADIOS
Pressing DME, ADF, AUX, NAV1, or NAV2 selects and deselects the radio source and activates the annunciator. All radio keys can be selected individually or together.
MUSIC 1
MUSIC 1 can be heard by the pilot in COPILOT mode and in ALL mode, and can be heard by the copilot in PILOT mode and in ALL mode. In PILOT mode, the pilot can hear the selected radios, the copilot can hear MUSIC 1, the passengers can hear MUSIC 2, and the copilot and passengers can communicate with each other.
ALL Mode
ALL mode is selected when the PILOT and the COPLT keys are not annunciated. In ALL mode, everyone hears the selected radios and is able to communicate with everyone else. In this mode, both the pilot and copilot can hear MUSIC 1, while the passengers hear MUSIC 2.
COPILOT Mode
COPILOT mode is selected when only the COPLT key is annunciated. The pilot and passengers can hear the selected radios and communicate with each other. In this mode, the pilot can hear MUSIC 1, while the passengers can hear MUSIC 2.
Input PILOT Key Press COPLT Key Press
PILOT ALL CREW
Current ICS Isolation State COPILOT CREW CREW COPILOT ALL PILOT
ALL PILOT COPILOT
Table 6A. 3. 2 ICS Isolation Mode Transitions
6A-10
Garmin G1000 Audio Panel Pilot's Guide
190-00378-02 Rev. A
OPERATION
Mode
PILOT LED OFF
COPLT LED OFF
TEL LED OFF
Pilot Hears Selected radios; pilot; copilot; passengers; MUSIC 1 Selected radios; pilot; copilot; passengers; MUSIC 1; TEL audio Selected radios; pilot
Copilot Hears Selected radios; pilot; copilot; passengers; MUSIC 1 Selected radios; pilot; copilot; passengers; MUSIC 1; TEL audio Copilot; passengers; MUSIC 1; TEL audio Copilot; passengers; MUSIC 1 Copilot; TEL audio
ALL OFF OFF ON
ON PILOT ON
OFF
OFF
Passenger Hears Selected radios; pilot; copilot; passengers; MUSIC 2 Selected radios; pilot; copilot; passengers; MUSIC 2; TEL audio Copilot; passengers; MUSIC 2; TEL audio Copilot; passengers; MUSIC 2 Selected radios; pilot; passengers; MUSIC 2 Selected radios; pilot; passengers; MUSIC 2; TEL audio Passengers; MUSIC 2; TEL audio Passengers; MUSIC 2
Input to Phone
None
Pilot; copilot; passengers
Copilot; passengers
OFF
ON
Selected radios; pilot; TEL audio Selected radios; pilot; passengers; MUSIC 1 Selected radios; pilot; passengers; MUSIC 1; TEL audio Selected radios; pilot; copilot Selected radios; pilot; copilot; TEL audio
Pilot
OFF COPILOT OFF
ON
OFF
Copilot
ON
ON
Copilot
Pilot; passengers
ON CREW ON
ON
OFF
Selected radios; pilot; copilot Selected radios; pilot; copilot; TEL audio
Passengers
ON
ON
Pilot; copilot
Table 6A. 3. 3 ICS Isolation Modes & Telephone Distribution 190-00378-02 Rev. A Garmin G1000 Audio Panel Pilot's Guide 6A-11
OPERATION
VOLUME/SQUELCH CONTROL
When the GMA 1347 MAN SQ key is selected, pressing the VOL/SQ knob toggles between volume and squelch adjustment. When the unit is in volume adjustment mode, the VOL annunciation on the lower left of the VOL/SQ knob is lit and volume can be adjusted. When the unit is in squelch mode, the SQ annunciation on the lower right of the VOL/SQ knob is lit and squelch threshold level can be adjusted.
NOTE: When the MAN SQ key is not selected (auto-squelch is active), pressing the VOL/SQ knob has no effect on the VOL/SQ selection state and VOL is automatically annunciated.
When transitioning from auto to manual squelch, the unit returns to the previous VOL/SQ selection (see table below).
NOTE: The volume and squelch controls for the COM and NAV radios are located on the PFD and MFD bezels (refer to the VHF NAV/COM Pilot's Guide for details).
Intercom VOL/SQ
Intercom Volume Control Intercom volume can be controlled with the VOL/SQ knob. When MAN SQ is off (key not annunciated) volume adjustment is automatically selected and the VOL annunciation is lit. Current VOL/SQ State Manual, VOL selected Manual, SQ selected
Figure 6A. 3. 6 Volume/Squelch Control
Input Previous State: Manual, VOL selected MAN SQ Key Press Previous State: Manual, SQ selected GMA 1347 VOL/SQ Knob Press
Auto, VOL selected Manual, VOL selected
Auto, VOL selected Manual, SQ selected Auto, VOL selected Manual, SQ selected
Auto, VOL selected
Manual, VOL selected
Table 6A. 3. 5 Transitioning from Auto to Manual Squelch Mode 6A-12 Garmin G1000 Audio Panel Pilot's Guide 190-00378-02 Rev. A
OPERATION
To adjust ICS volume when MAN SQ is OFF (key not annunciated): 1. To adjust ICS volume when MAN SQ is ON (key annunciated), do one of the following: 1a. If the unit is in manual squelch threshold adjustment mode (SQ annunciation at the lower right of the VOL/SQ knob is lit), press the VOL/SQ knob to toggle to ICS volume adjustment mode, and turn the appropriate VOL/SQ knob. If the unit is already in ICS volume adjustment mode (VOL annunciation at at the lower left of the VOL/SQ knob is lit), turn the appropriate VOL/SQ knob. To adjust squelch threshold level manually when MAN SQ is OFF (key not annunciated): 1. [. . . ] Both the pilot and the copilot can transmit at the same time from either the pilot side unit or copilot side unit.
190-00378-02 Rev. A
Garmin G1000 Audio Panel Pilot's Guide
6A-15
OPERATION
If transmit-interlock is not activated, all the selected receivers are heard at all times. Without transmit-interlock, during simultaneous transmission, interference may be heard on the COM receivers. Transmission by one radio produces static or squeal, resulting in loss of communication on other radios. [. . . ]