Ag Leader GPS 3100 Operators Manual - Manual (Page 28)

Troubleshooting Add-On GPS 3000/3050/3100
Ag Leader Technology
June 2001 Rev. 1 3000124 26
Problem Cause Solution
When the Add-On
GPS is used on a
vehicle, such as a
truck or car, the 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.
• Attach a 6 inch or 12 inch square
sheet of metal to the vehicle for
mounting the antenna on to aid in
blocking interference.
Antenna voltage
indicates 5 volts or
more.
• Loose connection.
• Antenna is
malfunctioning.
• Check bulkhead connection.
• Check antenna connections.
Near dusk the Add-On
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 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, specifically
the combine, 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.
Monitor dims when
using external power
source for PF3000.
• External power
source for PF3000
does not provide
enough power.
• New external power source is
available to support Add-On GPS
to PF3000.
After powering up the
PF3000 with Add-On
GPS you are unable to
enter the GPS setup
screen.
• PF3000 did not
properly detect the
Add-On GPS.
• Power the PF3000 down and then
restart.
• Ensure the connector cable
between the PF300 and GPS is
properly connected.
• If these actions fail, please call
Technical Support at 515-232-
5363.