User Manual

UTD1000L
User Manual
62
Figure 6-6 Trigger Hold Off
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
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 contin
uously 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 s
ource.
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“ ',
, -
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Note:
Setting Trigger System