Garmin GMA 347 - Manual (Page 8)

Garmin GMA 347 Pilot’s Guide 190-00325-00 Rev. B
6
Description
In Crew Isolation mode, the Pilot and Copilot can
communicate with each other while the passengers are able
to communicate only with each other. In All mode, there is
no isolation 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
clearance recorder.
COM Muting on Transmit
The COM Muting on Transmit option mutes all secondary
COM audio while the primary COM radio is transmitting.