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2.9 Configuration, and Adjustment Options
The GMA 245 has several configuration/adjustment options (see
adjustments are as follows:
•
Wired Telephone Volume
•
Auxiliary 1 Volume
•
Auxiliary 2 Volume
•
Auxiliary 3 Volume
•
Alert 1 Volume
•
Alert 2 Volume
•
Alert 3 Volume
•
Alert 4 Volume
•
Speaker Volume
•
Master Avionics Squelch (Section 2.9.1)
•
High Cockpit Noise Option (Section 2.9.2)
•
Music In Isolation Option (Section 2.9.3)
•
Alerts Mute Music Option (Section 2.9.4)
2.9.1
Master Avionics Squelch (MASQ) Function
MASQ functions to prevent low level noise from being passed to the headset ear speakers, this is known as
"squelching" or muting the audio. To "break" or "open" squelch means that enough audio signal is present
that the signal is passed through and can be heard. Increasing this setting increases the signal level
required to break/open squelch. If needed, adjust the MASQ SQ level so the audio background noise is
muted.
2.9.2
High Cockpit Noise Option
Enable to help reduce intercom background noise in very high noise cockpit environments. Disabled by
default.
2.9.3
Music In Isolation Option
Enable to allow pilot and copilot to hear selected music when PILOT or CREW isolation mode is active.
Disabled by default.
2.9.4
Alert Mute Music Option
Disable this option to prevent music from being muted when alert audio is heard. Enabled by default.
190-01879-11
Rev. 6
Section
2.9.6). These configuration/
GMA 245/245R Installation Manual
Page 2-6
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