Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
4000 X-Series Oscilloscopes Advanced Training Guide
105
Your scope should now be triggering on CAN data frame = 07F
HEX
as shown in
. With this scope’s very fast hardware-based decoding, you should also
see some decoded red “flashing” near the end of this packet/frame of data. This is
an indication that the scope is capturing and quickly decoding infrequent Error
Frames. Let’s now capture a very long stream of CAN traffic (1 second of
acquisition time) and then manually search through the captured and decoded
record.
18
Press the
[Serial]
front panel key.
19
Tap the
Lister
softkey; then use the
Window
menu to select
Half-Screen
.
20
Set the scope’s timebase to
100.00 ms/div
.
21
Press
[Run/Stop]
to stop repetitive acquisitions.
22
Tap the
Scroll Lister
softkey; then turn the Entry knob to manually scroll through
the lister table.
As you scroll through the data, note that waveforms “track”. This means that the
frame that the arrow points to in the lister table corresponds to the waveforms that
are positioned at center-screen. If you want to zoom in on a particular CAN frame
of data, either push the Entry knob, or tap the
Zoom to Selection
softkey. Looking for
infrequent errors in this long decoded record can be difficult. So let’s now perform
Figure 69
While triggering on CAN data frame = 07F
HEX
, the scope’s hardware-based
decoding reveals infrequent error conditions.
