Transmitting; Optional Com Muting; Pa Function; Cabin Speaker - Garmin G1000 Reference Manual

SECTION 4 – AUDIO PANEL
Pressing the COM1 or COM2 receiver key selects the
COM radio as an active receiver source. Any combina-
tion of radios can be selected separately or simultaneously
regardless of the active transceiver selection. The active
COM radio is always heard through the headsets.

Transmitting

When a transmitter is keyed, the active transceiver
MIC key annunciator blinks approximately once per sec-
ond. A white TX indication appears next to the active
COM frequency on both the PFD and the MFD during
transmission.
NOTE: Audio level of the COM radio(s) is con-
trolled by the COM volume controls located on
both the PFD and MFD (see the VHF NAV/COM
Pilot's Guide).
64

Figure 4-2 Transceivers

Garmin G1000 Cockpit Reference Guide for Cessna Nav III

Optional COM Muting

The COM muting on receive and COM muting on
transmit options can each be disabled in configuration
mode. When COM muting on receive is enabled, all sec-
ondary COM audio is muted upon detection of a received
primary COM signal. When COM muting on transmit is
enabled, all secondary COM audio is muted during trans-
mission over the primary COM radio.

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.

Cabin 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 cen-
ter for details.