Guralp Systems CMG-DM24S12AMS - Manual (Page 23)

CMG-DM24S12AMS Operator's guide
Usually, the values of the STA and LTA periods, and of the Ratio, will
be the same for all checked channels. For convenience, Scream! will
automatically fill in other values to match ones you enter. If you want to
use different values for some channels, you should uncheck Common
values before altering them.
Once you have enabled the STA/LTA triggering method on a particular
channel, you can use the Control window to change the values of the
STA and LTA periods, together with the Ratio, without restarting the
digitiser (see
Section 3.2, “Controlling digitisers” .)
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