Technical data

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 Figure 73. 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.