User manual

Digital Storage Oscilloscope 24
The trigger level values are displayed at the upper right corner of the screen.
Trigger When: The pulse width of the source must be ≥5ns so that the oscilloscope
can detect the pulse.
＝, ≠: Within a ±5% tolerance, triggers the oscilloscope when the signal pulse
width is equal to or not equal to the specified pulse width.
＜, ＞: Triggers the oscilloscope when the source signal pulse width is less than
or greater than the specified pulse width.
2.7.3 Video Trigger
Video triggering can be used to capture the complicated waveforms of most standard
analog video signals. The trigger circuitry detects the vertical and horizontal interval of
the waveform and produces triggers based on the video trigger settings you have
selected. The series of scope support standard video signal field or line of NTSC
(National Television Standards Committee), PAL (Phase Alternating Line) and custom
Triggers
when pulse is equal to width
setting ±5%
= Trigger Point
Threshold level
Triggers when pulse is
greater than
width setting
Triggers when pulse is not equal to
width setting ±5%
Tolerance
Tolerance
Threshold level
Triggers when pulse
is less
than width setting