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Page 1-4 GTX 330 Installation Manual
Revision G 190-00207-02
BDS register information is presented for the installation agency to understand the functionality of the
GTX 330, and make a determination that the unit complies with the requirements of their civil aviation
authorities. No further wiring or configuration programming is required for the unit.
Note that BDS (3,0) is only required for transponders compatible with ACAS/TCAS II. The GTX 330
does not support BDS (3,0).
1.6 Technical Specifications
The following table presents general environmental specifications. For detailed specifications, see the
Environmental Qualification form in Appendix A.
1.6.1 Electrical Specifications
Specification Characteristic
TSO, JTSO; GTX 330 TSO-C112*, JTSO-2C112a.
TSO, JTSO; GTX 330D TSO-C112*, JTSO-2C112a.
TSO ENV CAT Refer to Appendix A
FCC Authorization Emission Designator 12M0M1D
Applicable Documents RTCA DO-160D, DO-181C, EuroCAE ED-73A
Unit Software RTCA DO-178B Level D
Temperature Range
-45°C to +70°C (continuous operation)
Power Requirements 11.0 to 33.0 Vdc; Power Input: 22 watts typical, 45
watts maximum
Humidity
95% @ +50°C for 6 hours; 85% @ +38°C for 16 hours;
Tested to Category A in DO-160D
Altitude 55,000 Feet
Transmitter Frequency 1090 MHz ±1 MHz
Transmitter Power 125 watts minimum, 250 watts nominal.
Receiver Frequency 1030 MHz
Receiver Sensitivity -74 dBm nominal for 90% replies
Mode A Capability 4096 Identification Codes
Mode C Altitude Capability 100 Foot Increments from -1000 to 62,700 feet.
Mode S Altitude Capability 25 Foot Increments from -1000 to 50,175 feet with
suitable serial data altitude. 100 Foot Increments from
-1000 to 62,700 feet.
Mode S Capability Selective Identification Codes, Aircraft Type
External Suppression Input
Low ≤ 0.5 V; High ≥ 8 V
Audio Output
4.04 Vrms to 7.85 Vrms into a 500
load
* Note: Refer to Paragraph 1.6.3 Configurations Available, for TSO class.