Svantek SVAN 979, Руководство пользователя

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55
SVAN 979 User Manual
Slope trigger
The Slope+ / Slope- trigger starts a signal recording on condition: rising/falling
value of the measured result ( Source ) averaged over the Trigger Period
passes above/below the threshold value ( Level ).
After pressing the <Start> key the instrument checks the trigger condition with steps, defined by the
Trigger Period parameter, and if condition is met starts the signal recording. Recording will last
Recording Time (unless the measurement is stopped earlier), and during this time the instrument continues to
check the trigger condition with the Trigger Period step. If next trigger condition is met during Recording Time
(provided that Trigger Period is shorter than Recording Time ) the instrument triggers recording again, so it
will continue from this moment by additional Recording Time and so on. If during next recording time there
are no triggers, recording will be stopped after the last trigger plus Recording Time . Several WAV files can be
created during one measurement.
The attached example shows that between
measurement start and stop two records
were created. The first record is equal to
Recording Time , because during this
period no second trigger condition has been
met. During the second recording the
measurement was stopped, and the record
is shorter than
Recording Time .
Note:
When recording is waiting for the slope trigger the “slope” icon
appears alternatively with the „wave” icon.
or
Level trigger
The Level + / Level - trigger starts a signal recording which will last
Recording Time (unless the measurement is stopped earlier) on condition:
value of the measured result ( Source ) averaged over the Trigger Period is
greater/lower than the threshold value ( Level ). In other c
ases, recording doesn’t
start, but if it has been already started it will 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 recording is waiting for the level trigger the “level” icon
appears alternatively with the „wave” icon.
or