Guralp Systems CMG-DM16R8, Operating Manual

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Operator's Guide
Z-secs
,
N-secs
,
E-secs
and
X-secs
are the time period 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), the value you
specify here will be ignored.
For example,
1 1 2 2 STA
will calculate short-term averages
over 1 s for the
Z
and
N
components, and over 2 s 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
s of 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
are the time period 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), the value you
specify here will be ignored.
For example,
15 20 20 20 STA
will calculate long-term
averages over 15 s for the Z component, and over 20 s for the
N
,
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
s of all components.
RATIOS
Syntax:
Z-ratio N-ratio E-ratio X-ratio RATIOS
Sets the ratio of STA to LTA above which a trigger will be
declared in the
STA/LTA triggering algorithm.
Z-ratio
,
N-ratio
,
E-ratio
and
X-ratio
are the time period
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),
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