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UTD1000L User Manual 51
Figure 6-6 Trigger Hold-Off
Note:
1. The trigger hold-off time can be adjusted only when horizontal menu displays.
2. Generally hold-off time is a little smaller than “Big Period’, for instance for RS232
communication signal waveform, hold-off time should be a little larger than start edge
time of each frame in order to easily observe the waveform.
6.4 Setting Trigger System
Trigger system determines when the Oscilloscope starts to acquire data and display
waveforms. Once the trigger is properly set, the Oscilloscope can transform unstable signal
into meaningful waveform. When the acquisition starts, the Oscilloscope continuously acquires
enough data to fill the pretrigger portion that is displayed to the left of trigger point. Then the
trigger occurs, the Oscilloscope will continue to acquire enough data to fill the posttrigger
waveform to the right of trigger point. TRIGGER button is designed to set up the Oscilloscope
trigger functions.
TRIGGER: Trigger menu button
Trigger Level: to set up signal voltage that corresponds to the trigger point.
Press TRIGGER button to turn on trigger menu as indicated in the figure below, then press F1
button to switch between different trigger types.
Press F2 to select trigger source.
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