Crew Mode; All Mode; Entertainment Inputs; Music 1 - Garmin G1000 Reference Manual

SECTION 4 – AUDIO PANEL

CREW Mode

CREW mode is selected when both the PILOT and
COPLT keys are annunciated. In CREW mode, both the
pilot and copilot can hear the selected radios and com-
municate with each other, while the passengers can only
hear MUSIC 2.

ALL Mode

ALL mode is selected when the PILOT and the
COPLT keys are not annunciated. In ALL mode, everyone
hears the selected radios and is able to communicate with
everyone else. In this mode, both the pilot and copilot
can hear MUSIC 1, while the passengers hear MUSIC 2.
Table 4-3 summarizes the ICS operation for the four
(4) ICS isolation modes and telephone distribution.

Entertainment Inputs

The current ICS isolation mode affects the distribution
of the entertainment inputs MUSIC 1 and MUSIC 2.

MUSIC 1

MUSIC 1 can be heard by the pilot in COPILOT mode
and in ALL mode, and can be heard by the copilot in PI-
LOT mode and in ALL mode.

MUSIC 1 Muting

MUSIC 1 muting occurs when aircraft radio, marker
beacon, or ICS activity is heard.
Muting of MUSIC 1 is also triggered by marker beacon
activity when in ALL, CREW or COPILOT mode. After
muting ceases, MUSIC 1 gradually returns to its original
volume level. This characteristic is known as "soft mute."
The time required for MUSIC 1 to return to its original
volume level at the headset outputs is between 0.5 and
4 seconds.
68 Garmin G1000 Cockpit Reference Guide for Cessna Nav III
NOTE: If the MKR/MUTE key is pressed and held
for three (3) seconds, the GMA 1347 toggles
music muting ON and OFF during radio signal
reception. Upon toggling, either one (1) or two
(2) beeps can be heard; one (1) beep indicates
that music muting is enabled and two (2) beeps
indicate that music muting is disabled.
MUSIC 2
MUSIC 2 can only be heard by the passengers and is
never muted.