Keysight 4000 X-Series, Руководство по продвинутой подготовке

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100 4000 X-Series Oscilloscopes Advanced Training Guide
4
Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
44
Tap the Segmented softkey; then enter 50 on the keypad as the number of
segments to capture.
45
Tap the Segmented softkey to begin a Segmented Memory acquisition (be
patient… these errors occur very infrequently).
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When the scope finishes capturing 50 segments, tap the Current Segment
softkey; then turn the Entry knob to review all 50 captured segments and note
the time between each event.
Segmented Memory optimizes oscilloscope acquisition memory by only capturing
important segments of a waveform based on the trigger condition and timebase
setting. In this example, we have selectively captured just bursts of data that
include a parity error over a time-span exceeding 20 seconds as shown in
Figure 65 .
Note that although not shown and demonstrated, we can also view the segmented
decoded RS232/UART serial data in the “lister” format, and we can also perform
Search & Navigation on the segments. Let’s now view this decoded RS232/UART
in a different numeric format to uncover a important Keysight marketing message.
47
Press the
[Serial]
front panel key; then tap the Settings softkey
48
Tap the Base softkey; then select ASCII .
Figure 65 Using the scope’s Segmented Memory acquisition to selectively capture 50
occurrences of Parity Errors.