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= (equal to time value): trigger when the positive or negative slope time of the input signal is equal to
the specified time value.
For example, for a positive pulse, if you set t (pulse real width) = 200ns, the waveform will trigger.
7. Press of 50% softkey to set the trigger level to the vertical midpoint between the peaks of the trigger
signal. The trigger level values are displayed at the upper right corner of the screen.
8. Press the Width soft key and select V0 to set the reference width of the pulse signal.
The pulse width of the data 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.
9. Press the Mode softkey, turn V0 to select the trigger mode (auto, normal), and press V0 to confirm.
Auto: When the oscilloscope meets the trigger condition, it completes a trigger acquisition once; when
the trigger condition is not met, it can run the acquisition waveform freely.
Normal: When the oscilloscope meets the trigger condition, the input waveform is displayed; when the
trigger condition is not met, the original waveform is displayed.
10. Press the Holdoff softkey and turn V0 to set the time that the oscilloscope waits before a trigger to
the next trigger, so that complex waveforms are displayed stably.
2.7.3. Video Trigger
Video triggering can be used to capture the complicated waveform 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).
1. Press the [Trig Menu] button on the front panel to enter the Trigger function menu.
2. Press the Type softkey, then turn the Multifunctional Knob to select Video and push down the knob
to confirm.
3. Press the Source softkey turn the Multifunctional Knob to select CH1~CH2 as the trigger source.
4. Press Polarity to select the trigger polarity (positive and negative).
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