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3000LRS DGPS RECEIVER
OPERATOR’S MANUAL
A Product of the Fugro Group of Companies
Issue 2.00 JUNE 2003
B11203400PMBRA0 / 12
Model 3000LR8S or LR12S
This model contains an internal 8 or 12 channel GPS receiver and will operate
without connection to an external GPS position. With the internal position input a
composite set of RTCM corrections is computed from the GPS network data sent
over the link. The following information is required to compute these corrections;
time (supplied via the link), GPS almanac data (supplied via the link), and
receiver location from the internal GPS receiver interfaced via the AUX port.
Note : When the unit is first supplied, or not used for a long period of time,
or moved a large distance between use it may take up to 40 minutes to start
outputting RTCM corrections.
•
With the 3000LR8/12 operating the NMEA data will appear on the DATA port,
this port will need to be set up to match the requirements of your user
equipment, use the User Settings - Data Port menu item to set these (see
Appendix A).
•
The GPS position and quality information can be viewed on the VBS menu
display. The differential mode can be ascertained by the state of the Q value
displayed in the VBS data displays.
•
The internal GPS engine is configured to output NMEA format position and
data telegrams. These strings are echoed to the DATA port and can be
monitored.
Do not change the internal GPS (IGPS) port settings within
the ‘User Settings’ menu. Any adjustment to the default settings will
prevent the internal position from being read.
A Typical 3000LR8S/12S System operating in VBS mode
RF
Antenna
NMEA position
data to user Data
Logger
Navigation
System