Guralp Systems CMG-DM24 - Manual (Page 67)

Operator's guide
tap is the tap number at which to output the triggered stream. You
can set which taps output which sample rate using the SAMPLES/SEC
command, described above.
components is an integer below 16, which represents which
components to output in the same fashion as in the CONTINUOUS
command, above.
* This command and the previous one have similar names; remember
that a component TRIGGERS the system, whilst taps and components
are TRIGGERED.
STA
Syntax: Z-secs N-secs E-secs X-secs STA
Sets the length of the short-term averaging period in the STA/LTA
triggering algorithm.
Z-secs, N-secs, E-secs and X-secs define the time periods over
which to calculate the average for the Z, N, E, and auxiliary
components, respectively. If a component is not considered by the
triggering algorithm (see TRIGGERS, above), any value you specify
here for that component will be ignored.
For example, 1 1 2 2 STA will calculate short-term averages over 1
second for the Z and N components, and over 2 seconds for the E and
auxiliary components.
* If you issue STA with only one argument, it is used for all four
components. For example, 5 STA will calculate averages over 5
seconds for all components.
LTA
Syntax: Z-secs N-secs E-secs X-secs LTA
Sets the length of the long-term averaging period in the STA/LTA
triggering algorithm.
Z-secs, N-secs, E-secs and X-secs define the time periods over
which to calculate the average for the Z, N, E, and auxiliary
components, respectively. If a component is not considered by the
triggering algorithm (see TRIGGERS, above), any value you specify
here for that component will be ignored.
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