90
3000 X-Series Oscilloscopes Advanced Training Guide
4
Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
37
Press the
[Run/Stop]
front panel to begin repetitive acquisitions again.
38
Press the
[Trigger]
front panel key; then press the
Trigger Setup
softkey.
39
Press 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
Press the
Mode Auto
softkey; then select
Normal
.
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
. 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.
44
Press the
Segmented
softkey; then turn the Entry knob to select
50
as
the number of segments to capture.
45
Press the
Segmented
softkey to begin a Segmented Memory acquisition
(be patient… these errors occur very infrequently).
46
When the scope finishes capturing 50 segments, press the
Current
Segment
softkey; then turn the Entry knob to review all 50 captured
segments and note the time between each event.
Figure 64
Triggering on Parity Errors.