Guralp Systems CMG-DCM build <10,000 - Manual (Page 126)

Acquisition Modules and Platinum Firmware Digitiser Synchronisation
Here, you can configure the NMEA sentences that will be sent to the digitiser.
You can specify the location (latitude, longitude, elevation), the geoid (the
offset of the location from the theoretical earth surface) and whether to invert
the Pulse-Per-Second signal (if unchecked, the PPS line will be briefly
asserted each second, on the second, and held to ground at other times). It is
not essential that the position string sent matches the physical location of the
digitiser, as only the GPS time signal is used by the digitiser. Click
to
save the changes.
9.7.2 Configurable parameters in expert mode
The following additional parameters are available in expert mode:
Log file: It may sometimes be desirable, for debugging purposes, to separate
log messages for this transmitter from the standard system log. The text field
can be populated with a path name which will then be used for dedicated
logging. If left blank, logging occurs (via the standard Linux syslog facility) to
/var/log/messages.
Log level: The drop-down menu controls the level of detail present in log
messages, whether to syslog or to a dedicated log file. Not all of the standard
syslog logging levels are available. The menu offers a choice (in order of
decreasing detail) of:
• Debugging information
• Informational messages
• Important notices
• Warnings
MAN-EAM-0003 126 Issue E - February 2014