Ag Leader PFadvantage Harvest & Application Operators Manual - Manual (Page 235)

PFadvantage Troubleshooting
Ag Leader Technology All Modes
September 2003 6-17
Problem Cause Solution
Differential correction
fades in and out
• A strong
thunderstorm or
disturbance is near or
located between
antenna and
differential source.
• You are in a fringe
area for reception.
• Interference from
your vehicle or
machinery. • The thunderstorm must pass or decrease in
intensity.
• Determine if there are thunderstorms in the
vicinity or call Ag Leader Technology to see
whether the beacon near you is operational.
• Move the antenna to a position where it is not as
strongly affected by the interference.
SNR for the beacon
being used is very low or
the unit cannot lock on a
differential correction.
• Electrical noise
generated by the
vehicles electrical
system. • Move the antenna to a location that is not
affected.
• Use a line filter on main power to unit.
Near dusk the GPS loses
differential or switches
erratically from beacon
to beacon for about one
half-hour.
• Changes in
atmospheric
properties near dusk
affect signal quality
and can induce
skipping of signals
that usually can not
be received. • Set unit in Manual Mode on the BEACON
OPTIONS screen to help keep the correction the
user receivers more consistent. This is an
operational characteristic that can not be
eliminated.
When the lights on a
vehicle are turned on the
SNR value drops
considerably or
differential correction is
lost completely
• The load on he
electrical system has
increased and noise
has been introduced
into the system. • Check the alternator to see whether it is in
satisfactory condition and whether its capacity is
correct for the loads it must carry.
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