CSI Wireless GBX, Справочное руководство

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GBX Reference Manual 49
Table 4-1 NMEA Message Elements
Element Description
$GP Message Identifier Indicating a GPS Related Message
YYY Type of GPS NMEA Message
xxx Variable Length Message Fields
<CR> Carriage Return
<LF> Line Feed
Null, or empty fields occur when no information is available for that field.
To issue NMEA commands, use a program with a terminal utility
running on a PC computer. You may type these commands into the
terminal window once you have matched the communication
parameters between the terminal program and the GBX. You must
ensure that when you press the Enter key on your PC or terminal
device to send a command, it represents both a carriage return <CR>
and line feed <LF>. If a NMEA command is not working, this terminal
facility option may not be set correctly. Please contact your dealer, or
CSI Wireless Customer Service for more information.
4.2.1 CSI Wireless GPS Command Center
If you are using CSI Wireless's GPS Command Center program, the
terminal feature allows you to issue any of the NMEA commands listed
throughout this chapter, appending each Command or status query
message automatically with a <CR> <LF>. This software is available
for download from CSI Wireless’s World Wide Web site.
4.3 GBX-8M Message Activation
The Mototola VP Oncore 8-channel GPS engine contained within the
GBX-8M uses one command to set the various NMEA messages
output by the receiver. This command has the following format:
$PMOTG,x,y<CR><LF>