Garmin GMA 347 Installation Manual page 12

The Recorder can be disabled using an external switch. The digital recorder can playback up to two and a
half minutes of recording. Refer to the GMA 347 Pilot's Guide (190-00325-00) for complete system
operation.
The GMA 347 is FAA TSO approved to C50c and C35d Class A, and ETSO approved to C50c and
2C35d (pending). A marker beacon receiver with dual sensitivity and audio muting with automatic re-
arming is included in the unit. Operating voltage range is from 11 to 33 volts.
The GMA 347 provides two stereo auxiliary entertainment inputs; MUSIC 1 and MUSIC 2. Two 3.5 mm
stereo phone jacks should be installed in a convenient location for this purpose. These inputs are
compatible with popular portable entertainment devices such as MP3 and CD players. The headphone
outputs of these devices are plugged into the MUSIC 1 or MUSIC 2 jacks.
Only the pilot and copilot hear MUSIC 1. MUSIC 2 is a non-muted input heard only by the passengers.
MUSIC 1 and MUSIC 2 characteristics are affected by the active intercom mode. Refer to the GMA 347
pilot's manual for details.
MUSIC 1 is soft-muted when an interruption occurs from an aircraft radio. Soft muting is the gradual
return of MUSIC 1 to its original volume level. MUSIC 1 can also be configured to mute during ICS
activity. MUSIC 2 is a non-muted input.
1.2.1 Features Summary
•
Logical front panel layout
•
LED annunciators indicate selected function
•
Six position intercom: pilot, copilot, four passengers
•
Three stereo headset amplifiers: one for pilot, one for copilot, and one for the passengers
•
Two stereo music source inputs
•
Four selectable intercom operational modes
•
Independent pilot, copilot, and passenger volume control
•
VOX control for mic inputs
•
Automatic selection of radio audio source when corresponding mic is selected
TM
• MASQ
Processing
•
Split COM transceiver function. Copilot may transmit and receive on COM 2 while pilot
transmits and receives on COM 1
•
COM swap function
•
TX indication
•
SmartMute
•
Autosquelch
•
Speaker output for radios or PA function
•
Power-off fail safe connection for Pilot PTT, mic and Pilot's Headset-Left to COM 1
•
Voice Recorder with Playback
•
Configurable Options. See Sections 4 and 5 for connection and configuration details.
Page 1-2
Revision A
TM
marker audio muting
GMA 347 Installation Manual
190-00325-01