Guralp Systems Scream - Manual (Page 47)

User guide
You can alter the size of window used by changing the value in
this selection box.
Using a smaller window size produces a smoother graph, at the
expense of losing information about lower frequencies. To
examine lower frequencies, you will need to increase the
window size; however, doing this will increase the noise visible
at high frequency.
4.3.4 Pre-sets
When you are happy with your filter design:
•
Click to apply the filter to the Waveview window and
close the Filter Design window.
•
Alternatively, click to apply the filter and leave the
Filter Design window open.
Ticking the Auto-Apply check-box makes the Filter Design window
apply immediately any changes you make to the filter. Since applying
a filter may take some time, you should not tick Auto-Apply if you are
viewing a large amount of data.
To save the design in Scream!'s configuration file, click and
enter a name for the filter. You can now select the filter from the
drop-down menu next to the Waveview window's Filter icon.
January 2014 47