G1000 Supplemental Maintenance Manual
Page 2-2
Textron Nav III Series
Revision 3
190-02128-04
Transponder
The Garmin GTX 33, GTX 345R, or GTX 335R transponders communicate with the GIA 63Ws
through RS-232 digital interface.
The GTX 345R also communicates with the G1000 Avionics through an HSDB interface
connected to the PFD. When installed, the GTX 345R communicates and controls the GTS
Processor through the HSDB interface for all TAS operations. The GTX 345R mixes and
coordinates the TAS targets with TIS-B targets to provide one coordinated traffic display to the
crew.
The transponder units are mounted in the tail section of the aircraft.
Power is provided to the GTX from the Avionics Bus #2. The GTX transponder interfaces with a
transponder antenna mounted to the bottom of the fuselage.
GTX 345R/GTX 335R
Figure 2-2, Transponder
Summary of Contents for G1000 NXi
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