Garmin GDL 88, Installation Manual

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GDL 88 TSO Installation Manual Page 1-3
190-01122-00 Rev. A
1.3.3 GPS/SBAS Specifications
Table 1-4. GPS/SBAS Specifications – GDL 88 and GDL 88D with GPS/SBAS
Characteristics Specifications
Number Of Channels 15 (12 GPS and 3 SBAS)
Frequency 1575.42 MHz L1, C/A code
Sensitivity
(Acquisition, No Interference) -134.5 dBm GPS
-135.5 dBm WAAS
Sensitivity (Drop Lock) -144 dBm
Dynamic Range > 20 dB
Lat/Lon Position Accuracy <1.25 meter RMS horizontal, <2 meter vertical, with WAAS
Velocity 1000 knots maximum (above 60,000 ft)
TTFF (Time To First Fix) 1:45 min. typical with current almanac, position, and time
Reacquisition 10 seconds typical
Position Update Interval 0.2 sec (5 Hz)
1 PPS (Pulse Per Second) 275 Nsec of UTC second
Datum WGS-84
SATCOM Compatibility SATCOM compatibility is dependent upon antenna selection.
Antenna Power Supply 35 mA typical, 40 mA max at 4.7 VDC
1.3.4 978 MHz UAT Transceiver Specifications
Table 1-5. UAT Transceiver Specifications
Characteristics Specifications
Frequency 978.00 MHz
Transmit Power 50 W (+47 dBm)
Frequency Tolerance + 20 PPM
Modulation Continuous Phase FSK, h = 0.6, Raised Cosine shaping, a = 0.5
Data Rate 1.04 Mbps
99% Power Bandwidth 1.3 MHz
60 dB Bandwidth 3.3 MHz (estimated)
Receiver Sensitivity -96 dBm for 90% MSR