Guralp Systems CMG-DCM build <10,000 User Manual
Page 181
Acquisition Modules and Platinum Firmware
Transmitting Data
12.2.1.1 Configurable parameters in simple mode
The configurable parameters for the Mini-SEED compressor have two tabbed
pages in simple mode: General and Channels.
General
User description: Set to a meaningful name for the data the compressor will
handle.
Enable/Disable: The server can be enabled or disabled at boot-up.
Buffer size: Data converted by the compressor are written to a ring-buffer
which is read by both the miniSeed recorder and the SEEDlink transmitter.
The size of this buffer can be set using the text entry field, which accepts an
integer number of mebibytes. Records can be extracted from this buffer to a
file: see section 14.4.4 on page 238 for more details.
Block size: The SEED block size is set in the compressor and can not be
changed by subsequent software modules. This has the important implication
that, if data are to be transmitted using the SEEDlink server, this parameter
must be set to 512 bytes. The size is controlled by the drop-down menu and
the possible choices range from 256 bytes to 8K bytes, doubling at each step.
The default value is 4K bytes: this is chosen as the optimal for mass storage
device recording.
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Issue E - February 2014