Guralp Systems CMG-DM24 - Manual (Page 4)

CMG-DM24
1 Introduction
The Güralp CMG-DM24 multi-channel digitizer is a state-of-the-art
digital module for seismic data. It can be supplied in several different
formats:
A stand-alone DM24 (below) can be installed with existing or new
analogue sensors. Conversely, a modular digitizer is fixed to, and
becomes a physical part of, a Güralp seismometer. These can be
supplied with new instruments, or retrofitted to CMG-1T, 3T, 3ESP or
40T seismometers at the factory. A modular digitizer benefits from the
sensor's isolated, clean and stable environment and allows it to operate
at optimum noise levels and precision
The DM24 can also be supplied in borehole sonde form, with optional
strain relief accessories. All these units operate identically, although
the connector for the borehole unit is necessarily more compact.
A DM24 is especially powerful when operated in conjunction with a
Güralp data module such as the CMG-DCM or AM. All three types -
sensor, digitizer, and data module - can be customized to meet your
installation requirements.
1.1 Features
•
A built-in Digital Signal Processor (DSP), which can provide
simultaneous multiple sample rate data streams at user
selectable rates. Up to 6 streams of data for each component are
available at sample rates from 1 to 1000 samples/s.
•
A precision microprocessor-controlled time-base synchronizes
the Analogue-to-Digital Converters and the DSP, as well as
providing time-stamps for data blocks.
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