Trigger
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9.2.5
Window Trigger
Windows trigger provides a high trigger level and a low trigger level. The instrument triggers when the input signal passes
through the high trigger level or the low trigger level.
There are two kinds of window types: Absolute and Relative. They have different trigger level adjustment methods.
Under Absolute window type, the lower and the upper trigger levels can be adjusted respectively via the Level knob.
Under Relative window type the Center value is adjusted to set the window center, and the Delta value is adjusted to set
the window range. The lower and the upper trigger levels always move together.
Figure 9.15
Window Trigger
•
If the lower and the upper trigger levels are both within the waveform amplitude range, the oscilloscope will trigger
on both rising and falling edge.
•
If the upper trigger level is within the waveform amplitude range while the lower trigger level is out of the waveform
amplitude range, the oscilloscope will trigger on rising edge only.
•
If the lower trigger level is within the waveform amplitude range while the upper trigger level is out of the waveform
amplitude range, the oscilloscope will trigger on falling edge only.
