Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
3000 X-Series Oscilloscopes Advanced Training Guide
79
Lab #16: Decoding, Triggering, and Searching on SPI Serial Bus Signals
In this lab you will learn how to set up the scope to decode and trigger on
4- wire SPI serial bus traffic. In addition, you will learn how to use the
scope’s automatic SPI Search & Navigation capability, as well as use
Segmented Memory acquisition to capture multiple and consecutive
occurrences of a particular serial byte. This lab does not provide a tutorial
on the SPI protocol and signaling. To complete this lab, your scope must
be licensed with the SPI trigger and decode option (Option EMBD), as well
as the MSO option. You can verify the installed options on your
oscilloscope at
[Help] > About Oscilloscope
.
1
Press
[Default Setup]
on the scope’s front panel.
2
Press
[Help]
; then press the
Training Signals
softkey.
3
Using the Entry knob, select the
SPI
signal; then press the
Output
softkey to turn it on.
4
Press the
[1]
front panel key two times to turn off channel- 1.
5
Press the
[Digital]
front panel key to turn on the digital channels of
acquisition.
6
Press the
Turn off D7-D0
softkey to turn off the lower 8 digital channels.
7
Press the
Turn off D15-D9
softkey to turn off the upper 8 digital channels.
8
Press the
Channel
softkey.
9
Turn the Entry knob to point to
D9
; then push the Entry knob to turn
on D9.
10
Repeat Step #9 to also turn on D8, D7, and D6.
11
Set the scope’s timebase to
200.0 µs/div
.