Guralp Systems CMG-CD24 User Manual
Page 11

Operator's Guide
Connect the wire from the breakout box to the CD24's 19-pin
connector labelled: POWER DATA GPS.
Connect the 6-pin connector on the breakout box to the GPS unit using
the GPS cable. Position the GPS so that it has a good view of the sky.
Note: If you do not have a view of the sky, you can operate the CD24
without a GPS unit, but timing information may be inaccurate.
Connect the sensor to the 26-pin connector on the side of CD24.
Connect the 6-pin data plug on the breakout box to the 9-pin serial
port on your PC using the serial cable.
Use the power cable to connect the 10-pin power plug on the breakout
box to a fused 10 – 28 V power source.
The CD24 and instrument are now fully operational and will already
be producing data.
After a few seconds, you should see the CD24 digitiser appear under
Network – Local – COM1 in the left-hand panel of Scream!'s main
window. (If your PC has multiple serial ports, it may appear under
some other COM port name.) Soon after, data streams will begin
appearing in the right-hand panel. Streams with higher sample rates
will appear sooner than those with lower sample rates:
If this does not happen, check all connections, and ensure the power
supply is providing the correct voltage and current.
Each data stream has a Stream ID, a six-character string unique to it.
Stream IDs normally identify the instrument, component and sample
March 2011
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