Guralp Systems CMG-DM24 - Manual (Page 80)

Operator’s Guide DM-24 Digitiser
Issue G January 2003 78
The CMG-DM24/12 digitiser output can be connected either via USB bus or RS232 to
any PC There are two RS232 outputs each RS232 outputs is for a 6-channel digitiser
with in the DM24/12 digitiser enclosure.
A single GPS for timing is used for the digitiser
units.
The power to the digitiser is through the power
connector. The power to the digitiser should not
exceed 13.5 volts.
As well as the analogue inputs for the 24-bit digitiser there are additional 16 slow rate
16-bit resolution analogue inputs. The inputs to the slow rate channels are through the
connector marked AUXILIARY. These inputs are
all single ended and fixed sample rate of 4 s/s.
Güralp Systems digital output seismometers, such
as CMG-3TD or accelerometers CMG-5TD can
be connected to the digital inputs of the 12
Channel recorders. These connectors are marked
as DIGITAL A and DIGITAL B. The digital
sensors can also be powered from this connector.