Gps9 - Gps Debug Screen - Leica MX400 Operating Instructions Manual

Appendix C - Engineering Mode
software into the unit. If these actions do not correct the tracking
problem, the unit will have to be sent into the factory for repair.
Again, don't worry about the meaning of the values displayed, and
only use this screen as a fault troubleshooting tool when you are
having problems tracking satellites. 99% of the time satellite
tracking problems will not be related to this screen.

GPS9 - GPS Debug Screen

This screen is useful during satellite acquisition. It can present some
important clues as to why the receiver is not working properly.
In the 6 channel version of the receiver, the above display is
presented. In the 12 channel version, the first 6 rows have 4 more
columns of data added representing the other 6 channels.
The first 6 rows of data represent GPS channel status. There are 4
columns of data for each channel:
Column 1 & 5: represents the PRN number assigned to a
specific receiver channel; a PRN number of 0 indicates
there are no satellites available to track on that channel.
Column 2 & 6: represents the current receiver channel status:
-1 or 1: the receiver channel unlocked and searching for a
2: the receiver channel found a carrier signal and is attempt-
Version 3.3
satellite;
ing to Frame, or synchronize, on the ID pattern and
message frame boundaries of the satellite. It is not
unusual for this value to go from a 2 back to a 1,
because it is possible that the wrong carrier for the
identified satellite was found.
Operator's Manual
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