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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 sys-

tem (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 in-

tercom 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.

Each microphone input has an automatic squelch

threshold. Manual squelch is available by pressing the

MAN SQ key.

190-00378-02 Rev. A

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.

Garmin G1000 Audio Panel Pilot's Guide

INTRODUCTION

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.

6A-1