MM-400A
8. Operation Screens
8-36
(Caution) Cautions for envelope function setting
[When any of the following operations is performed after setting the envelope
threshold, the envelope function is forcedly turned off, threshold data is
deleted, and the envelope judgment is not performed.]
• When items of WAVEFORM 1 and 2 are changed in the VIEW screen
• When the digit number of the decimal point changes by changing range
(current / voltage / displacement / force / external)
• When the unit of displacement / force / external is changed
• When SAMPLING INTERVAL is changed
[Upper/lower limit threshold by difference sampling/envelope intervals with
the measured waveform as a reference]
In ENVELOPE INTERVAL, the value above the maximum sampling value becomes
the upper limit level, and the value below the minimum sampling value becomes the
lower limit level.
In the following example, VALUE SET is selected for COMPARATOR MODE. In
case of % SET, the upper limit/lower limit value becomes higher as waveform
becomes bigger.
(Example) Difference between upper/lower limit thresholds with “SAMPLING
INTERVAL 20 μs and ENVELOPE INTERVAL 20 μs” and “SAMPLING INTERVAL
20 μs and ENVELOPE INTERVAL 100 μs”
ENVELOPE INTERVAL: 20 μs ENVELOPE INTERVAL: 100 μs
TE: Envelope interval H: Upper limit L: Lower limit
・・
・・・・・
L
L
L
L
H
H
H
TE
TE TE TE
H
waveform
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