Keysight 4000 X-Series, Руководство по продвинутой подготовке

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Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
4000 X-Series Oscilloscopes Advanced Training Guide 99
35
Push the horizontal position/delay knob to re-position the trigger point back to
center-screen.
36
Set the scope’s timebase to 1.00 ms/div .
37
Press the
[Run/Stop]
front panel to begin repetitive acquisitions again.
38
Press the
[Trigger]
front panel key; then tap the Trigger Setup softkey.
39
Tap the Trigger Tx Data softkey; then select Rx or Tx Parity Error .
40
Press the
[Mode/Coupling]
front panel key near the trigger level knob.
41
Tap the Mode Auto softkey; then select Normal . The parity error is infrequent, so
the scope will auto trigger on an asynchronous interval unless we force the
normal mode of triggering.
42
Set the horizontal position/delay to approximately -4.7 ms .
We now have the scope triggering exclusively on parity errors (note that “31” is
displayed in red) as shown in Figure 64 . Let’s now use the scope’s Segmented
Memory acquisition to capture 50 consecutive occurrences of parity errors. We will
then review the captured errors to determine how often they occur. But to
complete the rest of this lab your scope must be licensed with the Segmented
Memory option.
43
Press the
[Acquire]
front panel key.
Figure 64 Triggering on Parity Errors.