N 5 o, E 39), 5using scream – Guralp Systems CMG-3ESPCD User Manual
Page 39: 1 configuring digitisers
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
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.
39
Issue B - November 2013