System Overview190-01499-02 GTX 3X5 Transponder TSO Installation ManualRev. 9 Page 1-111.10 UAT Receiver Specifications (GTX 345 Only)Table 1-9 UAT Receiver Specifications1.11 1090 MHz Receiver SpecificationsTable 1-10 1090 MHz Receiver Specifications1.12 GPS Specifications (Units with Internal GPS Only)Table 1-11 GPS Receiver SpecificationsCharacteristic SpecificationFrequency 978 MHz + 20 ppmModulation Continuous phase FSK, h = 0.6, raised cosine shaping, a = 0.5Data rate 1.04 MbpsSensitivity -96 dBm for 90% MSRCharacteristic SpecificationFrequency 1090 MHz + 1 MHzModulation Binary pulse-positionData rate 1 MbpsSensitivity -81 dBm for 90% MSRCharacteristic SpecificationNumber of channels 15 (12 GPS and 3 GPS/SBAS)Frequency 1575.42 MHz L1, C/A codeSensitivity (acquisition, no interference) -134.5 dBm GPS-135.5 dBm SBASSensitivity (drop lock) -144 dBmDynamic range >20 dBLAT/LON position accuracy <1.25 meter RMS horizontal, <2 meter vertical, with SBASVelocity 1000 knots maximum (above 60,000 ft)TTFF (Time To First Fix) 1:45 min. typical with current almanac, position, and timeReacquisition 10 seconds typicalPosition update interval 0.2 sec (5 Hz)1PPS (Pulse Per Second) ± 275 nsec of UTC secondDatum WGS-84SATCOM compatibility SATCOM compatibility is dependent on antenna selectionAntenna power supply 35 mA typical, 40 mA max at 4.7 VDC
