Dgps Receiver (961Xd/962Xd - NorthStar 961 Reference Manual

DGPS receiver (961XD/962XD)

961/962 Operations and Reference Manual, Rev. A
100 m 2DRMS without differential
• Navigation update rate:1 per second
• Time-to-first-fix: 30 seconds (typical)
• Dynamics:
velocity—1800 km/h
acceleration—4 g
jerk—2 m/sec 3
• Operating modes: 2D nav, 3 or more satellites; 3D nav, 4
or more satellites visible
• SC-104 port processes all USCG SC-104 message types,
including 1 and 9
Signal processing
• Type: 2-channel, fully automatic
• Frequency range: 283.5–325.0 kHz (includes European
frequencies)
• Minimum signal: <5µV/m 100 bps
• Dynamic range: >100 dB
• Adjacent channel rejection: > 50 dB at 1 kHz
• Acquisition time: 5 seconds
• Noise Blanker: Predictive variable length
• Signal Detection: Acquisition via FLL, tracking via PLL
• Tuning Resolution: < 2Hz
Data processing
• Demodulation: MSK (Minimum Shift Keying)
• MSK Bit Rates: 25, 50, 100, 200 (automatically selected)
• Data Decoding: 2 parallel matched digital filters
Appendix A – Specifications
Page A-5