Chapter 4 SPAN Operation
CPT7 and CPT7700 Installation and Operation User Manual v12
107
Figure 33: Relative INS Example
An important command that can be used with Relative INS to manually change the maximum amount of time
to use RTK data is the
RTKTIMEOUT
command. This command is used to set the maximum age of RTK data
to use when operating as a rover station. RTK data received that is older than the specified time is ignored.
The default is 60 seconds, however when using Relative INS, it is suggested this be set to 5 seconds by
sending the command
RTKTIMEOUT 5
.
For information about the
RTKTIMEOUT
command, refer to the
4.11.1 Configure Relative INS
To configure the receivers to begin computing the relative information:
1. Setup a link between the receivers that will be used to transfer data (for example, radios).
2. Enable the transfer of relative corrections between receivers using one of the methods below.
l
Send the
RELINSAUTOMATION
command only at the Rover receiver
l
Send the
RELINSCONFIG
command at both the Master and Rover receiver
To configure Relative INS using the
RELINSAUTOMATION
command, the master and rover
receivers must be communicating using a COM port. If the master and rover are communicating via
an ICOM port, the
RELINSCONFIG
command must be used.
