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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. Data can be gathered from up to three digitizers compatible with the
Güralp Compressed Format (such as the Güralp CMG-DM24), 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 by various means 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.
Stand-alone DCM units are normally supplied with high-capacity
removable USB/FireWire disks 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.
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