143
Commands
At 10 Hz output rate, a baud rate of 115,000 bps is required to output all the NMEA messages. At
greater output rates, the raw data must be split between the two serial ports, or some of the
messages should be turned off. To receive data at high baud rates (e.g., 115,000), ensure that the
computer has a suitable serial I/O capability. Most newer computers with Pentium or 486 processors
have good enough serial communication to support high data rates.
AIM: Receiver Autonomous Integrity Monitor — Ext. Mem. G12 Only
$PASHS,NME,AIM,x,s,[f]
Enable/disable RAIM message on port x, where x is the output port, and s is ON or
OFF. This message is not output unless a position is computed. f is the optional
message output rate ranging from 0.05 to 999 seconds depending on the
measurement update rate option installed.
If the command is set without a period, the G12 uses the period set by the
$PASHS,NME,PER command If the $PASHS,NME,PER command is issued after
this message period has been set, the period resets to the PER setting.
Example
Enter the following command to enable RAIM message on port B.
$PASHS,NME,AIM,B,ON<Enter>
$PASHQ,AIM,[x]
The associated query command is $PASHQ,AIM,x. This command outputs the AIM
response message on port x, where x is the optional output port. This message is
not output unless a position is computed.
$PASHR,AIM
The response message to the set or query command is in the form:
$PASHR,AIM,s1,d1,n(d2-d3)*cc
G12RevD.book Page 143 Tuesday, April 2, 2002 4:33 PM
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