Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
4000 X-Series Oscilloscopes Advanced Training Guide
111
You should now see on your scope’s display what appears to be an un-triggered
display of a digital burst signal similar to
. Your scope is actually
triggering on random rising edges of channel-1, which is the scope’s default
trigger condition. But this signal is too complex to establish a unique trigger point
using simple edge triggering. This signal is a packet/frame of LIN serial bus traffic.
Let’s first set up the scope to intelligently decode this serial data stream based on
the LIN protocol, and then we will establish a more unique trigger point using LIN
triggering.
9
Press the
[Serial]
front key.
10
Tap the
Mode I
2
C
softkey; then select the
LIN
serial decode mode.
11
Tap the
Signals
softkey and then the
Baud Rate
softkey and verify that the
Baud
Rate
is set to
19.2 kb/s
.
Figure 73
Capturing a LIN frame using the scope’s Edge triggering mode.
