Guralp Systems CMG-DCM build <10,000 - Manual (Page 141)

Operator's Guide
known channel, which can serve as the basis for your own
mapping table.
•
“Manual - only channels named below are compressed”. This
mode offers both channel filtering and name mapping. If you
wish to use this mode, it may be useful first to run the system
in automatic mode for a short while: this will populate the
mapping table with an entry for each currently known
channel, which can serve as the basis for your own mapping
table.
Entries from the mapping table can be deleted by ticking their
associated check-box and submitting the form.
Additional configuration parameters are available in expert mode:
The Database directory field can be used to control the location of the
ring-buffer and associated files. In most configurations, the default
location is adequate but if, for example, a very large ring-buffer is
desired and the optional extra flash memory module is fitted, it may be
desirable to use the extra memory for this purpose. To do this, enter
into this field the path to a unique directory under
/media/flash_module.
It may sometimes be desirable, for debugging purposes, to separate log
messages for this compressor from the standard system log. The Log
file 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.
The Log level 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:
November 2010 141