Guralp Systems CMG-DM24S12AMS - Manual (Page 50)

CMG-DM24S12AMS Operator's guide
The system will produce this status message whenever it is powered up.
If this status is reported at other times it indicates that the system has
been reset by the built-in watchdog monitor. This will occur if the
system has suffered corruption as a result of external noise or power
dips.
If the digitiser does not have a GPS unit connected for time
synchronisation no further status reports are produced.
If a GPS unit is fitted, its operational status is reported on reboot and the
behaviour of the time synchronisation software will also be shown.
From a cold start, GPS will initially report No GPS time together with
its last position (taken from the internal backup.) All messages from the
GPS that involve a change of its status are automatically reported.
Repeated status messages are not shown to avoid unnecessary clutter.
The initial GPS status report will look like this:
If the GPS receiver is having difficulty locating satellites, there may be a
delay of several minutes before a new message is displayed, but if the
system has not been moved from its previous location it should report
the acquisition of one or more satellites and GPS time fairly quickly. The
report will also show the satellite numbers and their corresponding
signal strengths.
50 Issue B