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AgGPS 332 GPS Receiver User Guide 61
Troubleshooting 6
Intermittent DGPS signal
The correction signal strength can drop to
unusable levels. Causes include tree canopy
cover between the receiver and the
differential satellite, radar sets, and
microwave transmitters.
Move the receiver away from the tree cover
and/or from sources of electromagnetic
interference.
Tracking but not receiving a differential signal
The receiver is tracking satellites and tracking
an OmniSTAR satellite beam, but is not
receiving DGPS signals. The Home screen
indicates how many satellites are being
tracked, and whether a differential source is
being tracked.
You see:
h-3D for HP not converged
H-3D for HP converged
r-3D for RTK float
R-3D for RTK fixed
D-3D for DGPS
HP and RTK also give an indication of
positional accuracy on the Home screen.
Check that your DGPS service subscription is
still current and enabled.
For OmniSTAR service:
1. Use the AgRemote utility to navigate to
one of the following screens, depending on
what you are using:
•the Omni HP Info screen
•the Omni VBS Info screen.
2. Press 4 until Stop Date appears.
If the message
Access Unknown appears,
contact OmniSTAR to reactivate your
subscription. For more information, see
OmniSTAR, page 47.
The receiver must be switched on and
configured to track the correct satellite
coverage beam before it can be reactivated.
The receiver automatically tracks the correct
beam based on receiver geographic location.
If the receiver is manually changed, automatic
tracking is deactivated until you perform a
hard reset or firmware flash.
When a satellite subscription is activated, the
Home screen displays
D/3D.
Long time to initialize
In RTK mode, longer baselines require longer
initialization times. (The baseline is the
distance between the base receiver and the
rover receivers.)
Wait for the receiver to initialize or consider
repositioning the base receiver to shorten the
baseline. Make sure the rover is in a clear area.
Problem Possible solution