Garmin GTX 23 ES Installation Manual - Page 11

1.6 Interface Summary The GTX 23 provides the following interface connections via the rear connector. See Section 4 and Appendix C for connection details. • External IDENT input • External STBY input (useful for dual transponder installations) • External mutual suppression pulse input/output • Aircraft power input (14/28 Vdc) • RS-232 input #1 connection for altitude and unit control data • RS-232 output #1 connection for TIS and unit status • RS-232 input #2 connection for GPS data for ADS-B • Supports Comm-A and Comm-B protocol • ARINC 429 outputs for TIS data The GTX 23 supports the following list of Comm-B Definition Subfield (BDS) registers: • BDS (0,0) Air Initiated Comm-B (AICB) • BDS (1,0) Data Link Capability Report • BDS (1,7) Common Usage Ground Initiated Comm-B (GICB) Capability Report • BDS (1,8) Mode S Specific Services GICB Capability Report • BDS (1,9) Mode S Specific Services GICB Capability Report • BDS (1,D) Mode S Specific Services Protocols (MSP) Capability Report • BDS (2,0) Aircraft Identification • BDS (4,0) Selected Vertical Intention • BDS (5,0) Track and Turn Report • BDS (6,0) Heading and Speed Report • BDS (0,6) Extended Squitter surface Position • BDS (0,5) Extended Squitter Airborne Position • BDS (0,8) Extended Squitter Aircraft Identification and Category • BDS (0,9) Extended Squitter Airborne Velocity - Subtypes 1 and 3 • BDS (0,A) Extended Squitter Event Driven Data • BDS (6,1) Emergency/Priority Status • BDS (6,5) Aircraft operational Status GTX 23 Installation Manual 190-00906-01 Page 1-3 Revision A