Guralp Systems Scream - Manual (Page 41)

User guide
To open the Filter Design window, click on the arrow to the right of the
Filter icon
and select Design… from the drop-down menu.
From top to bottom, the window contains
•
the parameters of the current high-pass ( red ) and low-pass
( green ) filter in numerical form,
•
a graph of the response of the current filter, showing the –3 dB
level and corner frequencies,
•
(at bottom left) display settings for the graph, and
•
(at bottom right) control buttons for the window.
4.3.1 Filter parameters
The filter parameters are shown at the top of the Filter Design window.
•
Select Highpass to switch on the high-pass filter, and enter the
value of the corner frequency required in either the Hz or the
Secs (seconds) box. You are not allowed to enter a value of 0 in
either box.
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