Thales Z-Max Operation And Application Manual page 288

Step 3. Is the Communication Module using the correct port?
When setting up the rover GPS receiver, one of the parameters is the port through
which the rover receiver should expect data from the radio. If the parameter setting
does not match the port to which the radio is connected, the rover receiver will not find
the base data. When using the Communication Module, the port is Port D. Use the
field application software to verify that port D is set to be the radio port.
Not connected to correct port
Change the port setting to Port D.
Connected to correct port
Go to step 4 below.
Step 4. Is the GPS receiver tracking satellites?
The rover receiver must track satellites in order to compute its position. Use either the
front panel of the receiver or the field application software running on the handheld
computer to determine if the rover receiver is tracking satellites.
Not tracking satellites
See "GPS Receiver Does Not Track Satellites" on page
this problem.
Tracking satellites
Go to step 5 below.
Step 5. Are base and rover tracking at least 4 common satellites?
In order for the rover system to compute an RTK position, the base and rover
receivers must observe data from at least 4 common healthy satellites simultaneously.
Without this common data, the rover cannot compute an RTK position. Your field
application software includes the ability to inform you of which satellites are being
tracked by the base and which are being tracked by the rover and whether or not
these satellites are healthy. Use this feature to determine if the base and rover are
indeed tracking at least 4 common healthy satellites.
Not tracking 4 satellites
1. Check satellite availability.
a. Use the Mission Planning software to check satellite availability for your
current location and time.
Troubleshooting
254 to troubleshoot
265