Guralp Systems CMG-DCM build <10,000 - Manual (Page 66)

Acquisition Modules and Platinum Firmware Data Handling
The gdi­base and gdi­record programs are designed to be stateless, so
that the data on the mass storage device are always consistent. This means
the system is tolerant of power interruptions and of the mass storage device
being removed without notice.
Any number of input modules can be configured to acquire data in any
supported format from any source, simultaneously. These modules convert
their data and pass it to the multiplexor. Data can be acquired in any of the
following formats, from multiple sources:
• BRP via serial lines
• Scream, via Ethernet or ppp
• GDI-link, via Ethernet or ppp
• CD1.1
The architecture has been designed to support the addition of extra formats
simply by adding input modules. Please contact Güralp Systems if you have
requirements which are currently unsupported.
Any number of output modules can be configured to send data in any
supported format to any destination. The following data formats are
supported:
• GCF output via serial port or TCP stream
• GCF output via Scream (TCP or UDP)
• SEEDlink
• CD1.1;
• GDI (Güralp Data Interconnect)
• GDI-link
• WIN format output
• QSCD - Quick Seismic Characteristic Data (designed by KIGAM) output
• GSMS (Güralp Seismic Monitoring System) output
In the default, factory configuration, the acquisition module is configured to
receive serial GCF input on all of its serial ports except Data Out. There is a
single chain of data through the multiplexor to a Scream server. Data are also
recorded to the configured mass storage device in GCF format. This is shown
in the following diagram:
MAN-EAM-0003 66 Issue E - February 2014