Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
4000 X-Series Oscilloscopes Advanced Training Guide
129
21
Set the scope's timebase to
100.00 µs/div
.
22
Press
[Run/Stop]
to restart repetitive acquisitions.
23
Press the
[Search]
front panel key.
24
Tap the
Search Edge
softkey; then select
Serial 1: FlexRay
.
25
Tap the
Search for
softkey; then select
Frame ID
as our search criteria.
26
Tap the
Frame ID
softkey; enter
1
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
. These
frames are also marked in orange in the first column of the lister table. Your scope
should have found and marked approximately 20 occurrences of this search
operation based on a total acquisition time of 1 ms. Note that the number of
"found" events is indicated near the bottom of the display. If you want to
automatically navigate to each frame with ID of 1, press the
and
front panel
navigation keys (near the timebase controls).
Let's now use the scope's Segmented Memory mode of acquisition to selectively
capture 500 consecutive occurrences of our trigger condition (Frame ID = 1). This
would be extremely useful if you wished to capture an entire set of 64 cycles of a
Figure 87
Using the lister in conjuction with the search feature to find specific Frame IDs.
