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8.8 Internal Trigger
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Trigger point
control
range
0 V
Measurement data
0 V
Input Waveform (one cycle)
This cycle is compared with
the previous cycle for
detection
Previous Cycle (one cycle)
The control range is
applied to this cycle's
waveform
8.8.5 Waveform Detection Trigger (Memory Only)
The waveform detection trigger is intended for use when
measuring 50/60-Hz commercial power. The Time axis
setting on the Status Screen must be 10 ms or lower.
The waveform detection trigger function compares the
measured signal with a pre-defined control waveform range,
and triggers if the signal deviates from the control range
voltage.
The control range consists of a positive and negative
amplitude offset from either a standard sine wave or the
previous input cycle.
(1) Sine Wave
The control range is based on a sine wave (with RMS value
voltage) at the mains frequency.
(2) Previous Cycle
The control range of each cycle is based on the previous
cycle of the input waveform. This selection is used when
gradual changes should not cause triggering.
