Guralp Systems CMG-DCM build <10,000 - Manual (Page 67)

Acquisition Modules and Platinum Firmware Data Handling
The gdi2gcf module, know as the GCF compressor, is responsible for
re-blocking GDI samples into GCF blocks. It provides data to all GCF output
modules as well as to the gdi­record module, which writes GCF files to the
mass storage device. It has a number of configuration options, which are
described in section 11.2 on page 138.
A similar arrangement applies to miniSEED data: the gdi2miniseed module
provides data to the SEEDlink server and to gdi­record.
6.2 Configuring gdi-base
The gdi­base module requires no configuration in most applications. For
very complex situations, however, it may be necessary to create additional
MAN-EAM-0003 67 Issue E - February 2014