Section 6 - GPS/beacon combination receivers
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05/01/97 REV H
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Fast signal acquisition
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Fast-reacting, accurate speed and course
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Remote turn-on ability
6.1.3 Technical
specifications
Power requirements
•
10 to 40 VDC
•
8 watts power consumption
•
Internal 2-amp fuse
•
Remote turn-on ability
Electrical requirements
The 8900’s power supply is protected against reverse-polarity power
inputs, and features a remote turn-on ability. The 8900 turns on when-
ever power is applied to pin 25, ground to pin 13, and remote turn-on pin
12 is connected to a source of 5 to 40 VDC.
Signal processing
•
Two channels
•
283.5 - 325.0 kHz frequency range
•
< 2 Hz tuning resolution
•
Minimum signal strength: < 5
µ
V/m @ 100 bps
•
> 100 dB dynamic range
•
> 50 dB at 1 kHz adjacent channel rejection
•
Acquisition time: Five seconds, manual command; 15 seconds, auto-
matic warm start; 15 minutes, automatic cold start (only at first turn
on after installation—time varies depending on local beacon frequen-
cies)
•
Predictive variable-length noise blanker
•
Signal detection: acquisition via frequency-locked loop (FLL); track-
ing via phase-locked loop (PLL)
Data processing
•
Minimum shift keying (MSK) demodulation
•
Data decoding: parallel-matched digital filters
•
MSK bitrates: 25, 50, 100, 200 (automatically selected)
Data ports
•
Control input port: RS-232-C and RS-422 or NMEA 0183; 9600 or
4800 baud (jumper-selectable)
•
DGPS correction output port: RTCM SC-104 Version 2.1; 6 of 8
RS-232-C and RS-422 9600 or 4800 baud (jumper-selectable)
•
Monitor/control port: Bi-directional RS-232-C or RS-422 at 9600
baud
Summary of Contents for 8700
Page 2: ......
Page 10: ......
Page 16: ...Section 2 Introduction PAGE 6 05 01 97 REV H ...
Page 20: ...Section 3 Packaging PAGE 10 05 01 97 REV H ...
Page 32: ...Section 6 GPS beacon combination receivers PAGE 22 05 01 97 REV H ...
Page 46: ...Section 8 Input output configurations PAGE 36 05 01 97 REV H ...
Page 52: ...Section 9 Connector pinouts PAGE 42 05 01 97 REV H ...
Page 76: ...Section 12 8X00 engine monitor program PAGE 66 05 01 97 REV H ...
Page 78: ...Section 13 Glossary PAGE 68 05 01 97 REV H ...
Page 80: ...Section 14 Abbreviations and initialisms PAGE 70 05 01 97 REV H ...
Page 85: ...Index 05 01 97 REV H PAGE 75 ...