User's Manual

GlobalTrak ™ GT Lite Operation and Maintenance Manual
5.1 Monitoring the GT Lite
The GT Lite USB interface can be used for monitoring an diagnostics of GT Lite functions. This
includes troubleshooting as well as operational diagnostics (will the GT Lite work in an
operational scenario). This section describes how to interpret GT Lite diagnostic information.
It is broken down into three parts: Overview, Diagnostic information by Function and
Function by Diagnostic information. The first is an overview that describes how the diagnostic
information is sorted and the basic theory. The second section is diagnostic output sorted by
the GT Lite function (GSM registration, message creation, etc.). The second section is
diagnostic output sorted by the actual output.
Diagnostic Overview
The diagnostic output from GT Lite is a serial data stream. For most functions occurring
inside of GT Lite there are diagnostic print statements that output to HyperTerminal. Each
line of diagnostic output follows the following format:
SUBSYSTEM: (Function) Output
The SUBSYSTEM is a system in which the diagnostic information refers to. Under
Subsystem below, there is a list of each subsystem and a description.
The (Function) is a lower level descriptor that defines where in the code the diagnostic print
occurs. This piece does not occur on every print statement and can be ignored by the user.
The Output is the diagnostic print statement. This is the description that tells the user what is
going on inside of the unit.
Subsystem
NV:
NV statements deal with accessing and writing to Non-Volatile (NV) memory. This is where
configuration data and messages are stored. These statements are generally of no concern to
the user.
AT:
AT statements deal with very low level AT commands on the main processor. These can be
ignored by the user.
APPLICATION:
APPLICATION is a broad category that deals with many basic functions of the device. These
include communication between processors and systems and device configuration.
GPS:
GPS statements deal with the GPS module. This includes assistance data processing and GPS
configuration.
Prepared: R. Straz Date: July 25, 2007 Page 57 of
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