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Operator's Manual
very first time you turn the unit on, allow the receiver to run for at
least 20 minutes after changing to Red Solid to collect an almanac
from the satellites, regardless of whether a position update has been
calculated or not. This is also a normal indication if the HDOP is
greater than 10. The HDOP value can be read in the GPS function
screens.
Yellow Solid
GPS position update has a 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. If you are patient, the condition
will normally go back to Green Solid when you pick up another sat-
ellite or the geometry of the existing satellites improves. The factory
default level for this indication is with an HDOP of 4 to 10. During
this period, your positioning information is less than optimal, and
position accuracy may be off by as much as 10 to 30 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
GPS position update with HDOP value less than 4. This is the nor-
mal operating condition. Position accuracy is normally between 3 to
5 meters, but can be out as much as 30 meters. Keep in mind that
position accuracy is always only as good as the geometry of the satel-
lites and the navigation information provided by the satellites. This
is the normal operating condition and no icon will be displayed.
The Display:
The CDU uses a Transflective LCD display screen. It provides opti-
mum viewing in virtually all lighting conditions. To change the dis-
play contrast or backlight condition, select the CFG function key
and scroll down to the Lighting menu choice. Refer to the CFG sec-
tion of the manual for a complete description of menu options. The
(
change between daytime and night time screen settings, and turn On
or Off the unit.
Information displayed on the screen is normally divided into win-
dows, similar to what you might see on a normal computer. Each
screen has a page number in the upper left hand corner
14
) Power On/Off/Lighting triple function key allows you to quickly
Keypad & Display Description
.
Version 3.0
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Table of Contents
Troubleshooting
