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AgGPS 332 GPS Receiver User Guide 63
Troubleshooting 6
6.2 Problems with the GPS Receiver
Engine noise
An unshielded ignition system can cause
enough noise to block reception of a
differential signal.
Use resistor spark plug wires on the vehicle
ignition system.
An alternator can cause noise that interferes
with a differential signal.
• Use bypass capacitors, commonly available
in automotive stores for cleaning up
interference to CB and other radios. If the
problem persists, shield engine components
with aluminum foil.
• Relocate the antenna on the machine.
• Determine the optimal antenna location by
watching the SNR value on the Home
screen.
Note – Before replacing engine parts in an
attempt to solve this problem, make sure that
the problem is not caused by a computer or
power source near the receiver. Some
computers and their power sources cause
noise that disrupts GPS and satellite DGPS
signals.
Problem Possible solution
Mounting location
The receiver is not picking up a clear signal. Mount the receiver on the centerline of the
vehicle, away from any sources of interference
and with a clear view of the sky (see Choosing
a location, page 21).
Problem Possible solution