Trigger level
Trigger source
The WT1800 triggers here (the trigger point)
when the trigger edge is set to rising ( ).
Input zero line
(center of the
vertical axis)
100% (300 Vpk)
–100% (–300 Vpk)
• Measurement range: 100 Vrms or 50 Vrms when the crest factor is set
to CF3 or CF6, respectively.
• Trigger level: 25%
25% trigger level (75 V)
T
Trigger level
Trigger Point
The trigger point is the point at which a trigger occurs. The trigger point is always displayed at the left end of the
screen.
After the trigger is activated, the waveform display continues from the left of the screen to the right of the screen
with the passage of time.
(The arrow below the word “Trigger point” in the figure below is just for illustration. The arrow does not appear on
the actual display.)
• To prevent noise-related errors, the trigger feature has a hysteresis of approximately 1% when the crest
factor is set to CF3. For example, when the trigger slope is set to
, a trigger will occur if the input signal
level falls approximately 1% below the trigger level and then passes through the trigger level on a rising
edge. The trigger feature has a hysteresis of approximately 2% when the crest factor is set to CF6.
•
When integration is in progress or has been stopped, the trigg
er feature does not function. Therefore, the
waveform display start point (the signal level at the left edge of the screen) may not be stable. Also, the
numeric data measurement period may not be synchronized with the waveform data measurement period.
10 Waveform Display
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