Specifications
196 Z-Family Technical 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 base set commands are
only available if the CPD base option (K) is installed and the rover set commands are
only available if the CPD Rover option (J) is installed in the receiver. In addition,
using the base to output RTCM type 18/19 or 20/21 require the B option (RTCM Diff.
Base), and using the RTCM types in the rover require the U option (RTCM Diff.
Rover). 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:
$PASHS,CPD,s,c <enter>
where s is the 3 character command identifier, and c is the parameter to be set. The
only exception is command $PASHS,RTC,AUT,N/Y which will be used to set the
auto differential mode in both RTCM and CPD operation. 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.
To use RTCM type 18/19 or 20/21, $PASHS,RTC commands are also used. (See
“RTCM Response Message Commands” on page 187).
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:
$PASHQ,CPD,s,c <enter>
where s is the 3 character command identifier, and c 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-D), then the response will be output to that port. For example,
the query:
$PASHQ,CPD <enter>