Guralp Systems CMG-DCM - Manual (Page 5)

Operator's guide
1 Introduction
The CMG-DCM is a versatile Linux-based module for storing and
transmitting data captured using Güralp Systems Limited's range of
seismic measuring equipment. GCF data can be gathered from up to
three compatible digitizers or digital instruments, and stored in its on-
board Flash memory, from where it is written from time to time to a
USB hard disk or to another device on your network. Once data is on
the hard disk, you can connect to the DCM in various ways to retrieve
it.
Depending on your site requirements, the DCM may be supplied in
several formats. Although these look different, they all share the same
internal features.
•
A stand-alone DCM, housed in a high-impact copolymer
polypropylene case, may be connected to a digitizer through
mil-spec connector cables and installed in a ground station or
other location remote from the digitizer and seismometer. The
stand-alone DCM can accept data from up to three devices
connected to it through RS232 ports.
A stand-alone DCM unit is normally supplied with a high-
capacity removable disk for data storage. These disks allow the
DCM to be used as part of completely autonomous installation
in cases where communications links are poor or non-existent.
Manufactured and tested at Güralp Systems, the disks are
compatible with USB and FireWire standards and include an
internal temperature sensor and heater for use in cold
environments.
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