Figure 2-6, Transponders - Garmin G1000 Nxi System Maintenance Manual

The GTX 345R can also provide PVT and Traffic data via a Bluetooth interface for cabin
entertainment purposes.
For TCAS II operations, the GTX 3000 transponder communicates with the GTS Processor
through ARINC 429 digital interfaces (transmit and receive). Only the GTX 3000 supports
TCAS II operations with the GTS Processor.
The transponder units are mounted on the upper avionics equipment shelf in the tail section of
the airplane. Power is provided by the No. 1 GTX from Triple Fed Avionics Bus. The No. 2
GTX is powered from Left Gen Avionics Bus. All GTX transponders (non-diversity and
diversity) interface with a transponder antenna mounted to the bottom of the fuselage. Each
GTX diversity transponder (GTX33D and GTX 3000) interfaces to a transponder antenna
mounted to the top of the fuselage.
GTX 33()
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
GTX 345R/GTX 335R

Figure 2-6, Transponders

GTX 3000
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Revision 1