Technical Specification - Navtech Systems CamNav Operating Manual

Technical Specification

System Bi-phase data modulation 4800 baud NMEA 0183/ASCII data messages
GPS 12 channel all in view, fully dynamic GPS receiver
Accuracy Better than 15 metres RMS unaided, 3 metres DGPS.
Power 9 volts PP3 battery (500mAH), 4 hours continuous use
Size 145 x 82 x 32 – robust extruded aluminium case
Data output RS232 NMEA 0183 as input from GPS receiver.
GPS data - real time
1 PPS from internal GPS receiver – real time
NMEA 0183 messages:- $GPGGA, $GPRMC, $GPZDA
Connections Modulated data input/output - Phono (RCA jack)
RS232 output, GPS data, 1PPS, etc - 9 way "D" socket
2.1mm - DC power jack
Monitoring GPS fix/1PPS
Sync Lock
Bit lock
Serial data 9 Way D socket (for DCE modem type connections)
Pin #
1 = DCD 1 = Encode, 0 = Decode
2 = TX o/p GPS data - RS232 o/p
3 = RX i/p Ext GPS or DGPS (RTCM)
4 = DTR 1 = Ext' GPS data i/p
5 = 0 volts Common return input/output SCR
6 = DSR 1 PPS from internal GPS receiver
7 = RTS link to CTS - pin 8
8 = CTS link to RTS - pin 7
9 = RI "1" (~9 v) link to pin 4 for ext' GPS
Shell/Jack screw = 0 volts
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