Guralp Systems CMG-6TD - Manual (Page 89)

CMG-6TD Command-line interface
components is an integer below 16, whose binary bits represent the Z (1), N
(2), E (4) and auxiliary (8) components respectively. Thus, for example,
•
1 TRIGGERS will trigger from the Z component only (1);
•
6 TRIGGERS will trigger from either the N or E components (2 + 4 =
6);
•
7 TRIGGERS will trigger from any of the three components (1 + 2 + 4
= 7);
•
0 TRIGGERS will disable the triggering system.
7.5.2 TRIGGERED
Syntax: tap components TRIGGERED
Selects which component or components will be output when a trigger is
generated, and at which tap (sample rate).
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 determines which components to
output in the same fashion as in the TRIGGERS command, above.
(These two commands have similar names; remember that a component
TRIGGERS the system, whilst taps and components can be TRIGGERED.)
7.5.3 STA
Syntax: Z­secs N­secs E­secs STA
Sets the length of the “short-term” averaging period in the STA/LTA triggering
algorithm.
Z­secs, N­secs, and E­secs are the time periods over which to calculate
the average for the Z, N, and E 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 2 2 STA will calculate short-term averages for one second of
the Z component, and two seconds of the horizontal components.
7.5.4 LTA
Syntax: Z­secs N­secs E­secs LTA
Sets the length of the “long-term” averaging period in the STA/LTA triggering
algorithm.
MAN-T60-0002 89 Issue F - February 2014