Keysight 4000 X-Series, Руководство по продвинутой подготовке

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Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs
3
4000 X-Series Oscilloscopes Advanced Training Guide 63
Your scope should now be triggering on positive runt pulses of two different
widths as shown in Figure 37 . Note that as shown in previous labs, the high and
low trigger levels can be set using the touchscreen with the T
L
and T
H
markers to
the left of the display. You can also change the polarity of the runt triggering to
either “positive runts only”, “negative runts only”, or “either polarity runts” using
the appropriate softkey selection. Note that the Keysight 4000 X-Series
oscilloscopes can also trigger on runt pulses that meet a specific time
qualification. Based on the scope’s current timebase setting (100.0 ns/div), we can
estimate that the width of these two positive runt pulses shown in Figure 37 are
approximately 300 ns and 100 ns wide. Let’s set up the scope to uniquely trigger
on the positive runts that are < 200 ns wide. In other words, let’s isolate the
smaller of these two runts.
13
Tap the Qualifier softkey; and then select “ < ”.
14
Double-tap the Time softkey and enter 200.0 ns .
Figure 37 Triggering on positive runts.