Garmin GMA 350 Manuale del pilota - Pagina 7

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GMA 350/350c Audio Panel

FEATURES AND OPERATION

The GMA 350/350c Audio Panel provides the traditional audio selector

functions of microphone and receiver audio selection. The Audio Panel

includes an intercom system (ICS), a marker beacon receiver, and a COM

clearance recorder. Ambient noise from the aircraft radios is reduced by

Avionics Squelch (ASQ). When no audio is detected, ASQ processing further

reduces the amount of background noise. The MAN SQ Key toggles between

manual and automatic intercom system (ICS) squelch.

squelch mode, threshold adjustments are handled automatically by the

system. In manual ICS squelch mode, individual threshold adjustments can

be made for the pilot, copilot, and passenger microphones by the crew. The

ability to adjust individual thresholds for each ICS position further reduces

the amount of background noise from the radios.

Pushbutton keys control audio selection. When a key is selected, a triangular

annunciator above the key is illuminated. Annunciator brightness is adjusted

automatically by photocell dimming. Key brightness is adjusted by the radio

dimming bus control. Three Aux inputs are available for additional avionics

or audio devices.

Upon installation, the unit may be conﬁgured in various ways depending

on aircraft type and the needs of the pilot.

POWER-UP

The GMA 350/350c performs a self-test during power-up. During the

self-test all Audio Panel annunciator lights illuminate for approximately two

seconds. Once the self-test is completed, most of the settings are restored to

those in use before the unit was last turned off.

Garmin GMA 350/350c Pilot's Guide

In automatic ICS

190-01134-12 Rev. K