Guralp-systems CMG-3ESPCD Manual de usuario Pagina 39

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CMG-3ESPCD Digital Broadband Seismometer Using Scream!
5 Using Scream!
Scream! is a versatile seismic data visualisation program for Güralp
instruments, and is available for free download from Güralp Systems. See
http://www.guralp.com/scream/ for details about how to obtain Scream!.
5.1 Configuring digitisers
Scream! distinguishes between configuration and control of digitisers. The
most important difference is that a digitiser 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 digitiser:
1. Locate the digitiser you want to configure. All connected digitisers
have an entry in the tree on the left of Scream!'s main window. If the
digitiser is transmitting data through a remote server or EAM, you may
need to “unroll” the entry for that server (by clicking on the icon) to
see the digitisers connected to it.
2. Right-click on the digitiser's entry (not the icon for the server or any
Comxx icon). digitisers are shown with icons depicting a coloured
cylinder ( ).
3. Click Configure.... Scream! will then contact the digitiser and retrieve
its current configuration, a process which will take a few seconds. This
done, the Configuration set-up window will be displayed.
4. Once you are happy with any changes you have made in the
Configuration Set-up window, click UPLOAD to send them to the
digitiser and reboot. This will take a short while.
To control a digitiser whilst it is running, either right-click on the digitiser's
entry in the list and click Control..., or double-click the entry. In either case
Scream! will contact the digitiser to retrieve control information and display
the Control window. The options you can control immediately are:
the type of sensor you are using,
GPS power cycling options,
the short-term and long-term average values for triggering (but not
which streams perform the trigger, or which are output by it - see
“Triggering” in section 5.1.3 on page 44),
the length of pre-trigger and post-trigger periods,
calibration signal options, and
mass control functions.
MAN-C3E-0002 39 Issue B - November 2013
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