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1) Receiver will not
power on (No LED)
Power switch/wiring faulty.
Fuse/breaker blown (if used).
Reference
Troubleshooting
Chart
The receiver status indication
at the top left of the Satellite
Status Page will indicate ‘3D
Diff’ or ‘2D Diff’ when
differential corrections are
available. A ‘D’ appears at
the bottom of the signal
strength bar for each satellite
with a corresponding
differential correction.
Intermittent connection between
GBR 21 and GPS unit. Check
wiring and/or beacon antenna
connections.
Interference from ship’s electrical
system, thunderstorm activity, or
another source is preventing
signal lock-on.
Also refer to Troubleshooting
problems 6 and 7.
RTCM data not being received
from broadcast site.
Wrong bit rate selected on GPS
unit.
Wrong frequency selected on
GPS unit.
GBR 21 not wired properly with
GPS unit. Check wiring.
Also refer to Troubleshooting
problems 6 and 7.
2) LED status light
flashing
Beacon receiver is improperly
connected or baud rates do not
match.
Please refer to Troubleshooting
problems 6 and 7.
5) “RTCM Input
Failed” displayed on
GPS unit
4) “No RTCM Input”
displayed on GPS unit
3) “No DGPS Position”
displayed on GPS unit
Not enough data is available to
compute a DGPS position.
Please refer to Troubleshooting
problems 6 and 7.
Possible Cause
Problem