VOR Frequency Display on the MFD
If the Nearest VOR page is selected, the elds on the page may be
highlighted to select data. The VOR frequency displayed may be selected
and changed on the page. However, changing this eld will not replace the
information in the database and subsequent use of the VOR data page will
show the correct database frequency.
GMA 1347 AUDIO PANELS
The GMA 1347 Audio Panels integrate NAV/COM digital audio, intercom
system, and marker beacon controls. The GMA 1347 units also control
manual display reversionary mode (red DISPLAY BACKUP buttons) and
are installed between each PFD and the MFD. The GMA 1347 units
communicate with both GIA 63’s using an RS-232 interface.
GIA 63W INTEGRATED AVIONICS UNITS
The GIA 63W’s are the Integrated Avionics Units of the G1000 system.
The GIA 63W is the main communications hub, linking all LRU’s with the
PFD’s and the MFD displays. Each GIA 63W contains a WAAS certied
GPS receiver, VHF COM/NAV/GS receivers, and system integration
microprocessors. Each GIA 63W is paired with a GDU 1040 PFD. The GIA’s
do not communicate with each other directly.
GDL 69A DATA LINK RECEIVER
The GDL 69A is an XM Satellite Radio data link receiver with the addition of
XM Satellite Radio audio entertainment. For display of weather information
and control of audio channel and volume, the GDL 69A is interfaced to the
GDU 1040 Multi-Function Display via an Ethernet link. Audio volume and
channel changes may also be controlled with remotely mounted switches
located on the sidewalls of the passenger seating area. The GDL 69A is also
interfaced to the audio panel for amplication and distribution of the audio
signal. The GA 55 XM Satellite Radio Antenna receives the XM Satellite
Radio data signal and passes it to the GDL 69A.
GRS 77 ATTITUDE AND HEADING REFERENCE SYSTEMS
The GRS 77 units are Attitude and Heading Reference Systems (AHRS)
that provide aircraft heading and attitude information to the G1000 displays
and the GIA 63’s. The units contain advanced sensors, accelerometers, and
rate sensors. In addition, the GRS 77 units interface with the GDC 74A Air
Data Computers and the GMU 44 Magnetometers. The GRS 77 units also
utilize two GPS signal inputs sent from the GIA 63 units. Attitude and heading
information is sent using an ARINC 429 digital interface to the GDU 1040
displays and the GIA 63 units. The GRS 77 AHRS units are installed in the
oor of the airplane.
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