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 51
Your scope should now be triggering on the narrow infrequent glitch that follows
the repetitive burst of six pulses as shown in Figure 27 . Note that if this glitch was
more infrequent, you would also need to select the Normal trigger mode to avoid
auto triggering.
Let’s now use the scope’s Segmented Memory mode of acquisition to capture 500
consecutive occurrences of this burst of pulses to see if we can determine how
often the glitch occurs relative to the occurrence of each burst. But before
beginning a Segmented Memory acquisition, we will change the trigger condition
to trigger on the 300 ns wide pulse again so that we can capture every occurrence
of the burst. To complete the rest of this lab your scope must be licensed with the
Segmented Memory option.
16
Tap the “ < > >< ” softkey; then select the “ >< ” time qualifier.
17
Press the
[Acquire]
front panel key.
18
Tap the Segmented softkey twice and enter 500 as the number of segments to
capture.
19
Tap the Segmented softkey to begin a Segmented Memory acquisition.
20
Tap the Current Segment softkey; then turn the Entry knob to review all 500
captured segments. Or, tap it a second time to set a specific value.
Figure 27 Triggering on a narrow infrequent glitch using the scope’s Pulse Width triggering
mode.