G1000 Navigation/Communication Data Paths - Garmin G1000 NAV III Line Maintenance Manual

1.3.3 Navigation/Communication Systems
The GIAs contain VHF COM, VHF NAV, and GPS receivers. COM and NAV audio is sent via digital audio to
the GMA 1347 Audio Panel.
GPS information is sent to the GRS 77 AHRS and both displays for processing.
The GTX 33 Mode S Transponder communicates with both GIAs. Transponder data is sent from the GIAs to the
PFD.
The #2 GIA outputs analog HSI signals to the KAP 140 autopilot, if equipped. In the case of the GFC 700 both of
the GIAs communicate to the servos through RS-485, see Figure 1-1.
The GMA 1347 Audio Panel controls audio selections and the display reversionary mode.
Figure 1-3. G1000 Navigation/Communication Data Paths
Page 1-8 G1000 Nav III Line Maintenance Manual
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