Section 4: Audio Panel; Introduction; Description; Audio Panel Controls - Garmin G1000 Reference Manual

SECTION 4: AUDIO PANEL

4.1 INTRODUCTION

This section of the Cockpit Reference Guide describes
the major features of the G1000 Audio Panel (GMA 1347)
and also contains some basic operating procedures for the
most frequently used audio panel features.
NOTE: A complete audio panel description with
full operating procedures is presented in the
G1000 Audio Panel Pilot's Guide and Cessna Nav
III Supplement.
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.

4.2 DESCRIPTION

The GMA 1347 features three (3) major groups of keys
as shown in Figure 4-1:
• Communication keys
• Navigation keys
• Intercom system (ICS) keys
Each key is labeled to indicate the name of the func-
tion. 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. The large knob ad-
justs the volume/squelch level for the copilot/passenger.
The red DISPLAY BACKUP button below the dual vol-
ume/squelch knob controls reversionary mode selection.
Garmin G1000 Cockpit Reference Guide for Cessna Nav III
SECTION 4 – AUDIO PANEL

4.3 AUDIO PANEL CONTROLS

• Transceiver audio selector keys
(COM1, COM2) COM3 disabled
• Transmitter (audio/mic) selection keys
(COM1 MIC, COM2 MIC) COM3 MIC disabled
• Split COM key (Not available)
(COM 1/2)
• Dedicated telephone interface key (disabled)
(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) AUX disabled
• Intercom manual squelch mode key
(MAN SQ)
• Digital recording playback key
(PLAY)
• Intercom system (ICS) isolation mode keys
(PILOT, COPLT)
• Volume/squelch knob
(VOL/SQ)
• Reversionary mode button
(DISPLAY BACKUP)
61