Cpd Commands - ashtech GG Surveyor Reference Manual

CPD Commands

The CPD commands allow you to control and monitor CPD (carrier phase
differential) operations. The commands are either general parameter or query
commands, base set commands or rover set commands. The rover set commands are
only available if the CPD Rover option (J) is installed in the receiver, For a more
detailed discussion of CPD differential, refer to the Understanding CPD section in
this manual.
Set Commands
Through the set commands you can modify and enable a variety of CPD operating
parameters. Certain set commands are applicable only to the base station and certain
set commands only apply to the remote station. The general format of the set
commands is:
where str is the 3 character command identifier, and x is the parameter to be set. If the
set command is sent correctly, the receiver will respond with the $PASHR,ACK
acknowledgment. If a parameter is out of range or the syntax is incorrect, then the
receiver will respond with a $PASHR,NAK to indicate that the command was not
accepted.
Query Commands
The query commands are used to monitor the setting of individual parameters and the
status of CPD operations. The general format of the query command is:
where str is the 3 character command identifier, and x is the port to which the
response message will be output. The port field is optional. If the query is sent with
the port field left empty, then the response will be sent to the current port. If the port
field contains a valid port (A-C), then the response will be output to that port. For
example, the query:
outputs a CPD status message to the current port. The query:
output a CPD status message to port C.
Command/Response Formats
$PASHS,CPD,str,x<Enter>
$PASHQ,CPD,str,x<Enter>
$PASHQ,CPD<Enter>
$PASHQ,CPD,C <Enter>
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