G1000 TM audio panel pilot’s guide
Record of Revisions Revision Date of Revision Revision Page Range A 12/01/04 6A-1 – 6A-17 Description Initial release. Garmin G1000 Audio Panel Pilot’s Guide 190-00378-02 Rev.
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 intercom. LED annunciators indicate when a key function is selected. 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.
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. The knobs at the bottom of the unit control ICS volume and squelch threshold levels. The small knob adjusts the volume/squelch level for the pilot.
DESCRIPTION Transceiver Audio Transmitters Telephone Split COM Passenger Address Speaker Marker Beacon Signal Sensitivity Marker Beacon/Mute Navigation Radio Audio Navigation Radio Audio Manual Squelch Digital Recording Playback ICS Isolation VOL/SQ VOL Annunciation SQ Annunciation Reversionary Mode Control Figure 6A.2.1 Front Panel Controls 190-00378-02 Rev.
DESCRIPTION TRANSCEIVERS UNMUTED/UNSWITCHED INPUTS 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. The unit provides four (4) unmuted/unswitched inputs that are always present on the headsets or speaker.
OPERATION 6A.3 UNIT OPERATION POWER-UP AND FAIL-SAFE OPERATION Power-up The GMA 1347 performs a self-test during power-up. All panel annunciator lights illuminate for approximately two (2) seconds. Once the self-test is completed, the settings are restored to the ones in use before the unit was last turned off. See the System Overview section for additional power up information.
OPERATION Transmitting TELEPHONE INTERFACE When a transmitter is keyed, the active transceiver MIC key annunciator blinks approximately once per second. A white TX indication appears next to the active COM frequency on both the PFD and the MFD during transmission. The GMA 1347 contains a dedicated telephone interface that is closely linked to the ICS operation. It is controlled by the TEL key. See Table 6A.3.3 for a summary of the telephone distribution and the various ICS isolation modes.
OPERATION PA FUNCTION A passenger address function is provided by pressing the PA key. Push-to-talk (PTT) must be used to deliver PA announcements over the headsets. SPEAKER 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 switch is keyed. The speaker volume is adjustable above and below a nominal value. Contact a Garmin-authorized service center for details.
OPERATION Beacon Outer Marker Audio Frequency 400 Hz Audio Keying ——— Middle Marker 1,300 Hz •—•— Airway/Inner Marker 3,000 Hz •••• 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.
OPERATION NAVIGATION RADIOS MUSIC 1 Pressing DME, ADF, AUX, NAV1, or NAV2 selects and deselects the radio source and activates the annunciator. Selected audio can be heard over the headset and the speakers. All radio keys can be selected individually or together. 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. MUSIC 1 Muting MUSIC 1 muting occurs when aircraft radio, marker beacon or ICS activity is heard.
OPERATION INTERCOM SYSTEM (ICS) ISOLATION The intercom system (ICS) provides four (4) isolation modes: ALL, PILOT, COPILOT and CREW. The desired mode can be selected or deselected using the PILOT and COPLT keys. The possible ICS isolation states are summarized in the table below. Table 6A.3.3 summarizes the ICS operation for the four (4) ICS isolation modes and telephone distribution. PILOT Mode PILOT mode is selected when only the PILOT key is annunciated.
OPERATION Mode PILOT LED COPLT LED TEL LED Pilot Hears Copilot Hears Selected radios; pilot; copilot; passengers; MUSIC 1 Selected radios; pilot; copilot; passengers; MUSIC 1; TEL audio Selected radios; pilot; copilot; passengers; MUSIC 1 Selected radios; pilot; copilot; passengers; MUSIC 1; TEL audio Copilot; passengers; MUSIC 1; TEL audio Passenger Hears Selected radios; pilot; copilot; passengers; MUSIC 2 Selected radios; pilot; copilot; passengers; MUSIC 2; TEL audio Copilot; passengers; MUSIC
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.
OPERATION To adjust ICS volume when MAN SQ is OFF (key not annunciated): 1. Turn the appropriate VOL/SQ knob. 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. 1b.
OPERATION DIGITAL CLEARANCE RECORDER WITH PLAYBACK CAPABILITY The GMA 1347 provides a digital clearance recorder with playback capability of up to 2.5 minutes of COM signal recording. Recorded COM signals are stored in separate memory blocks. Signals from all of the selected COM radios are recorded and can be played back. Anyone able to hear the selected COM radios is able to hear the COM signal playback. Once the 2.
OPERATION REVERSIONARY MODE The red DISPLAY BACKUP button selects the reversionary mode for all displays. Reversionary mode operation displays important flight and engine information on both the PFD and MFD, in case of display failure. In dual audio panel configuration the DISPLAY BACKUP button operates on the pilot side only. Figure 6A.3.8 Reversionary Mode Button COCKPIT VOICE RECORDER INTERFACE The GMA 1347 provides the ability to interface to a cockpit voice recorder (CVR).
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. Dual COM performance varies significantly depending on the distance between the antennas and the tuned frequency separation. 6A-16 Garmin G1000 Audio Panel Pilot’s Guide 190-00378-02 Rev.
OPERATION Speaker not available on copilot side Reversionary mode operates on pilot side only Pilot Side Copilot Side Figure 6A.3.9 Dual G1000 Audio Panels (GMA 1347) 190-00378-02 Rev.
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