6-42
IM 701240-01E
Operating Conditions of the Wave Window Trigger
Target waveform: AC waveform or triangular waveform between 40 and 1 kHz.
(Rectangular waveforms such as inverter waveforms and waveforms
with a fast rising edge are excluded)
Sample rate: 10 kS/s to 500 kS/s
Acquisition mode: Normal
Trigger mode: Normal, Single, or Single(N)
Applicable Modules
• 701250 (HS10M12)
• 701251 (HS1M16)
• 701255 (NONISO_10M12)
• 701267 (HV(with RMS))
• 701261 (UNIVERSAL) (only when measuring voltage)
• 701262 (UNIVERSAL (AAF)) (only when measuring voltage)
• 701270 (STRAIN_NDIS)
• 701271 (STRAIN_DSUB)
• 701275 (ACCL/VOLT)
A trigger is activated if any of the specified trigger conditions (OR condition) is met.
Notes When Using the Wave Window Trigger
The wave window trigger cannot be used in the following cases:
• When the acquisition mode is set to Average or Envelope
• When the record time is less than or equal to 25 kW and T/div is less than 100 ms.
Normally, set the trigger mode to Normal, Single, or Single(N). Wave window triggers are
not easily triggered when the trigger mode is set to Auto or Auto Level.
The wave window trigger is used to detect rapid changes in the waveform. If a difference
is observed after comparing 1 to 4 cycles (reference cycles) of the previous waveform
and the current waveform, a trigger is activated. Therefore, if an abnormal waveform
such as surge is contained in the 1 to 4 cycles of the previous waveform immediately
after waveform acquisition is started (during which measured data of size equal to the
pretrigger section is acquired), a trigger is activated on the normal waveform. If this
happens, the trigger point may appear as though it is delayed by several cycles as
shown in the figure below. This phenomenon is unavoidable due to the principles of the
wave window trigger.
Trigger appears as though it is delayed by 1 cycle.
Surge
Trigger occurrence
Pre-trigger time
6.17 Setting the Wave Window Trigger (ENHANCED)
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