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Keypad & Display Description
Yellow Solid
Operator's Manual
DGPSposition update with poor HDOP value. You may see this from
time to time during normal operation. It usually occurs when you are
tracking 3, 4, or 5 satellites, and the satellites have poor geometry
relative to your position. The condition will normally go back to Green
Solid when it picks up another satellite or the geometry ofthe existing
satellites improves. The factory default level for this indication is with
an HDOP of4 to 10. During this period, your positioning information is
less than optimal, and position accuracy may be offby as much as 5 to
10 meters. You can press the GPS function key and refer to the GPS
section in this manual for guidance if this light condition occurs.
Green Solid
DGPS position update with HDOP value less than 4. This is the
normal operating condition. Position accuracy is normally better than
3 meters. Keep in mind that position accuracy is always only as good
as the corrections received, their age, your distance from the reference
station, and the geometry ofthe satellites. This is the normal operating
condition and no icon will be displayed.
GPS Traffic Light Operation:
Red Flashing
Not tracking satellites (no position update). This is normal for the
first 2 minutes or so when turning the unit on. The very first time you
turn the unit on, or ifthe memory is reset or lost, this condition is also
normal. Allow the receiver to run for at least 30 minutes under these
circumstances. If it still does not change to Red Solid, refer to the
troubleshooting section of the Installation & Service Manual. An
icon similar to the one at left will be displayed in the upper left corner
of the screen.
RedlYe/low Solid
Dead Reckoning. When normal GPS or DGPS operation is not avail-
able, this LED sequence is provided to quickly identify the DR naviga-
tion mode. A DR indicator is also displayed on all screens in the upper
left hand corner of the display.
Red Solid
Tracking one or more satellites (no position update). This is also
normal for the first 2 minutes or so when turning the unit on. The very
first time you turn the unit on, allow the receiver to run for at least 20
Version 7.5
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