Guralp Systems Scream - Manual (Page 42)

Scream! 4.5
While the cursor is in one of the frequency boxes, pressing the
and keys will nudge the corner frequency up and
down.
Alternatively, change the corner frequency by clicking on the
graph with the left mouse button. If the low-pass filter is active,
and you click to the right of the low-pass corner, both
frequencies will be moved.
If the frequency you want is not shown in the window, it may
be above the Nyquist frequency for the currently-selected
sample rate. Change the value in the n sps box at the bottom
left and try again.
Change the order of the filter by entering a number in the nth
Order box.
•
Select Lowpass to switch on the low-pass filter, and enter the
value of the corner frequency required in either the Hz or the
Secs (seconds) box.
Alternatively, change the corner frequency by clicking on the
graph with the right mouse button. If the high-pass filter is
active, and you click to the left of the high-pass corner, both
frequencies will be moved.
Change the order of the filter by entering a number in the nth
Order box.
42 Issue K