Intercom Squelch Threshold Control; Master Avionics Squelch (Masq) - Garmin G1000 Reference Manual

To adjust ICS volume when the MAN SQ key
is not annunciated:
Turn the appropriate VOL/SQ knob.
1.
To adjust ICS volume when the MAN SQ key
is annunciated, perform one of the following
steps:
1a. If the unit is in manual squelch threshold
adjustment mode (SQ annunciation at the
lower right of the VOL/SQ knob is lit), press the
VOL/SQ knob to toggle to ICS volume adjust-
ment mode, and turn the appropriate VOL/SQ
knob.
1b. If the unit is already in ICS volume adjustment
mode (VOL annunciation at at the lower left
of the VOL/SQ knob is lit), turn the appropriate
VOL/SQ knob.

Intercom Squelch Threshold Control

Each microphone input has an automatic squelch
threshold. Manual squelch override as well as keyed ICS
operation (for noisier cockpits) is also available.
The VOL/SQ knob manually adjusts squelch thresh-
old when the MAN SQ key is annunciated and the SQ an-
nunciation is lit. The small VOL/SQ knob controls pilot
squelch threshold and the large VOL/SQ knob controls
copilot/passenger squelch threshold. Turning either knob
clockwise increases the threshold. Turning either knob
counterclockwise decreases the threshold.
NOTE: In manual squelch mode, when the
VOL/SQ knob is adjusted to minimum, all crew
audio inputs can break squelch. When the
VOL/SQ knob is adjusted to maximum, the ICS
audio is heard only when an ICS PTT is pressed.
Garmin G1000 Cockpit Reference Guide for Cessna Nav III
SECTION 4 – AUDIO PANEL
To adjust squelch threshold level manually
if the MAN SQ key is not annunciated:
Press the MAN SQ key:
1.
2a. If the VOL annunciation is lit, press the VOL/SQ
knob for SQ annunciation and turn the VOL/SQ
knob.
2b. If the SQ annunciation is already lit, turn the
VOL/SQ knob.
To adjust squelch threshold level manually
if the MAN SQ key is already annunciated:
1a. If the VOL annunciation is lit, press the VOL/SQ
knob for SQ annunciation and turn the VOL/SQ
knob.
1b. If the SQ annunciation is already lit, turn the
VOL/SQ knob.

Master Avionics Squelch (MASQ)

MASQ (Master Avionics Squelch) reduces ambient
noise from the aircraft radios. When no audio is detected,
MASQ processing further reduces the amount of back-
ground noise from the radios.
The Master Avionics Squelch (MASQ) threshold level
can be adjusted or disabled by a Garmin-authorized ser-
vice center.
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