Red Flashing; Red/Yellow Solid; Red Solid; Yellow/Green Solid - Leica MX400 Operating Instructions Manual

Keypad & Display Description

Red Flashing

not tracking satellites (no position update). This is normally for the
first 2 minutes or so when turning the unit on. The very first time
you turn the unit on, or if the 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
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Manual. An icon similar to the one at left will be displayed in the
upper left corner of screen.

Red/Yellow Solid

Dead Reckoning . When normal GPS or DGPS operation is not
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available, this LED sequence is provided to quickly identify the DR
navigation mode. A DR indicator is also displayed on all screens.

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 minutes after changing to Red Solid to collect an almanac
from the satellites, regardless of whether a position update has been
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calculated or not. This is also a normal indication if the HDOP is
greater than 10, if the receiver is tracking too few satellites, or other
reasons as well. Read the GPS and DGPS function screens for
more information.

Yellow/Green Solid

GPS position update; DGPS corrections are not being received.
You may see this from time to time during normal operation. It
usually occurs when the beacon signal is not available (either it is
being blocked by terrain or a local object or you are out of range of
the transmitter) and/or 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 beacon station. The factory default level for
dropping DGPS corrections is 60 seconds. During this period, your
positioning information is less than optimal, and position accuracy
may be off by as much as 75 to 300 meters. Press the DGPS
function key and refer to the DGPS section in this manual for
guidance if this light condition occurs.

Yellow Solid

DGPS position update with poor HDOP value. You may see this
Version 3.3
Operator's Manual
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