Technical data

82 3000 X-Series Oscilloscopes Advanced Training Guide
4 Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
Your scope should now be triggering on MOSI data = 03
HEX
with this byte
shown at center-screen similar to Figure 57. Let’s now capture a very long
stream of SPI traffic and then manually search through the captured and
decoded record.
30 Press the [Serial] front panel key.
31 Press the Lister softkey; then turn the Entry knob to select Serial 1 (SPI).
32 Set the scope’s timebase to 20.00 ms/div.
33 Press [Run/Stop] to stop repetitive acquisitions.
34 Press 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 SPI frame of data, either push the Entry knob, or press
the Zoom to Selection softkey. Let’s now perform an automatic search to find
every occurrence of MOSI data = 03
HEX
. We will then automatically
navigate to each of these occurrences.
35 Push the horizontal position/delay knob to re- position the trigger point
back to center-screen.
36 Set the scope’s timebase to 20.00 ms/div.
37 Press the [Search] front panel key.
38 Press the Search Edge softkey; then select Serial 1 (SPI).
Figure 57 Triggering on MOSI data = 03
HEX
.