Keysight 4000 X-Series, Руководство по продвинутой подготовке

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84 4000 X-Series Oscilloscopes Advanced Training Guide
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Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
either push the Entry knob, or tap the Zoom to Selection softkey. Let’s now perform
an automatic search to find every occurrence of a “Missing Acknowledge”. We will
then automatically navigate to each of these occurrences.
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Push the horizontal position/delay knob to re-position the trigger point back to
center-screen.
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Set the scope’s timebase to 20.00 ms/div .
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Press the
[Search]
front panel key.
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Tap the Search Edge softkey; then select Serial 1 (I
2
C) .
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Tap the Search for softkey; then select Missing Acknowledge as our search criteria.
The white triangles near the top of the waveform area mark the time location of
each “found” occurrence of our search operation as shown in Figure 53 . These
frames are also marked in orange in the first/pointer column of the lister table.
Your scope should have found and marked approximately 25 occurrences of this
search operation based on a total acquisition time of 200 ms. Note that the
number of “found” events is indicated near the bottom of the display. To
automatically navigate to each frame with a “Missing Acknowledge”, press the
and front panel navigation keys near the timebase controls.
Figure 53 Automatic Search & Navigation.