190-00734-11 GTX 33X and GTX 3X5 ADS-B Maintenance ManualRev. 6 Page 2-82.4 GTX 345/345RThe GTX 345/345R units are panel or remote mounted units providing Mode S with ADS-B Out extendedsquitter, and UAT and 1090 receivers for ADS-B In capabilities. The panel mounted unit contains anintegrated display while the remote mounted units require an interface to a control source for normaloperation and functionality.GTX 345/345R units provide the following features. Mode S transponder ADS-B Out capability ADS-B In capability with built-in 1090 MHz and UAT receivers Optional internal GNSS receiver Optional altitude encoder module Entry and display of squawk code and flight ID Display of pressure altitude Display of outside air temp Display of density altitude Display of flight timers Audio output Bluetooth interface for display of weather and traffic on portable devicesThe transponder annunciates when the unit has an ADS-B failure to alert the crew that the unit has adegraded ADS-B In or ADS-B Out system.GTX 345/345R units communicate through the following interfaces. HSDB ARINC 429 RS-232 RS-422 Gray code Discrete I/OFigure 2-4 provides a summary of the interfaces provided for the GTX 345 or GTX 345R. Refer toGTX 3XX Part 23 AML STC Installation Manual for interfaces allowed under this STC.
