Garmin GMA 347 Pilot’s Guide
190-00325-00 Rev. A
6
Description
In Crew Isolation mode, the Pilot and Copilot can commu-
nicate with each other while the passengers are able to com-
municate only with each other. In All mode, there is no isola-
tion and every occupant can communicate with every other
occupant.
The passengers cannot transmit over the active COM radio,
even if equipped with a PTT key.
UNMUTED/UNSWITCHED INPUTS
The unit provides four (4) unmuted/unswitched inputs that
are always present on the headsets or speakers. These inputs
are as follows:
• ALTITUDE WARNING
• UNSWITCHED 1
• UNSWITCHED 2
• UNSWITCHED 3
The unit may be configured with preset volume levels for
MUSIC 1, MUSIC 2, UNSWITCHED 1, UNSWITCHED 2,
UNSWITCHED 3 and ALTITUDE WARNING. See the
configuration table at the end of this manual. Contact a Garmin-
authorized service center for volume level adjustment.
COM MUTING
The COM muting on receive and COM muting on transmit
options are enabled in the Configuration mode.
COM Muting on Receive
The COM Muting on Receive option mutes all secondary
COM audio when a primary COM signal is detected.
When the COM muting on receive option is enabled, only
the primary COM radio audio is recorded by the digital clear-
ance recorder.
COM Muting on Transmit
The COM Muting on Transmit option mutes all secondary
COM audio while the primary COM radio is transmitting.
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6/15/2005 10:09:09 AM
