Svantek SVAN 977A - Page 54

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SVAN 977A User Manual
The Slope - trigger starts recording under the condition: falling value of the RMS
result (Source) averaged during 0,5 ms passes below the threshold level
(Level).
This is a mirrored trigger to Slope +.
Note: When a wave recording is waiting for the slope trigger the
“slope” icon appears alternatively with the „wave” icon.
or
Level type trigger
The Level +/Level - trigger starts recording by Recording Time under the
condition: value of the RMS result (Source) averaged by the 0,5 ms period is
greater/lower than the threshold level (Level). In other cases, recording doesn’t
start, but if it has been already started it can be continued until Recording Time
has elapsed.
If during Recording Time, the trigger
condition is met recording will be prolonged for
another Recording Time from the moment of
that trigger condition and so on.
Note: When a wave recording is waiting for the level trigger the “level”
icon appears alternatively with the „wave” icon.
or
External type trigger
When External is selected, recording starts from the external signal on the I/O
socket. In this case, it is necessary to set up the I/O Mode parameter as
Digital In (path: <Menu> / Instrument / Multifunction I/O).
After triggering, recording will last for Recording Time and if during this time
new external trigger appears the instrument will prolong recording for another
Recording Time.
Integr. Period type trigger
When the Integr. Period trigger is selected, recording is triggering every time
the measurement starts and lasts minimum Recording Time. If the triggering
condition appears during recording (when Integration Period is shorter than
Recording Time) from this moment recording will be continued for another
Recording Time and so on.
Int. Period Split type trigger
When the Int. Period Split trigger is selected, recording is triggering every time
the measurement starts and ending after the Integration Period time, e.g. the
recording time is equal to the Integration Period time. In this case the
instrument creates a WAV file for every measurement cycle.