Table of Contents
Advertisement
Section 6 - GPS/beacon combination receivers
6.1.3 Technical
specifications
PAGE 20
Fast signal acquisition
•
Fast-reacting, accurate speed and course
•
Remote turn-on ability
•
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 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
05/01/97 REV H
Advertisement
Table of Contents
