Guralp Systems CMG-DM24 - Manual (Page 29)

Operator's guide
4 Using Scream!
Scream! is a versatile seismic data visualisation program for Güralp
instruments which runs on Windows and Linux computers. If a
DM24's DATA OUT port is connected to an RS232 port on a computer
running Scream!, the program can be used to analyze digitized data
from the DM24's connected analogue sensors, and to control/configure
both the digitizer and the sensors themselves. Scream can also work
with network-attached digitizers.
Scream! is available for free download from Güralp Systems, or may
have been supplied with your equipment.
4.1 Configuring digitizers
Scream! distinguishes between configuration and control of digitizers.
The most important difference is that a digitizer may be controlled
through Scream! at any time whilst it is acquiring data, whereas
configuration options only take effect after a reboot (with consequent
loss of data).
To change the configuration of any connected digitizer:
1. Locate the digitizer you want to configure. All connected
digitizers have an entry in the tree on the left of Scream!'s main
window. If the digitizer is transmitting data through a remote
server or DCM, you may need to “unroll” the entry for that
server (by clicking on the icon) to see the digitizers connected
to it.
2. Right-click on the digitizer's entry (not the icon for the server or
any Comxx icon). Digitizers are shown with icons depicting a
coloured cylinder.
3. Click Configure.... Scream! will then contact the digitizer and
retrieve its current configuration, a process which will take a
few seconds. This done, the Configuration setup window will be
displayed.
4. Once you are happy with any changes you have made in the
Configuration Setup window, click UPLOAD to send them to the
digitizer and reboot. This will take a short while.
To control a digitizer whilst it is running, either right-click on the
digitizer's entry in the list and click Control..., or double-click the
entry. In either case Scream! will contact the digitizer to retrieve
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