Page 1-4 G1000 Nav III Line Maintenance ManualRev. L 190-00352-00GTX 33: Solid-state Mode-S transponder. Provides Modes A, C, and S functions.Control and operation is directed through the PFD. The transpondercommunicates with both GIAs through RS-232 digital interface. Software andconfiguration settings are received through RS-232 digital interface with the GIA.GDL 69/69A: The GDL 69/69A is an XM Satellite Radio data link receiver thatreceives broadcast weather data. The GDL 69A is the same as the GDL 69 withthe addition of XM Satellite Radio audio entertainment. Weather data and controlof audio channel and volume is displayed on the GDU 104X MFD, via a High-Speed Data Bus (HSDB) Ethernet connection. The GDL 69A is also interfaced tothe GMA 1347 Audio Panel for amplification and distribution of the audio signal.GDL 90 The GDL 90 is a remote-mounted product that contains a GPS/WAASreceiver and a Universal Access Transceiver. The GDL 90 will transmit“ownship” data via the UAT data link. It will receive data from other UAT-equipped aircraft as well as FIS-B weather – the received data may be output to anappropriate display.
