72
3000 X-Series Oscilloscopes Advanced Training Guide
4
Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
Lab #15: Decoding, Triggering, and Searching on I
2
C Serial Bus Signals
In this lab you will learn how to set up the scope to decode and trigger on
I
2
C serial bus traffic. In addition, you will learn how to use the scope’s
automatic I
2
C Search & Navigation capability, as well as use Segmented
Memory acquisition to capture multiple and consecutive occurrences of a
particular Read operation. This lab does not provide a tutorial on the I
2
C
protocol and signaling. To complete this lab, your scope must be licensed
with the I
2
C trigger and decode option (Option EMBD). You can verify the
installed options on your oscilloscope at
[Help] > About Oscilloscope
.
1
Connect the channel- 1 probe to the Demo 1 terminal and ground.
2
Connect the channel- 2 probe to the Demo 2 terminal and ground.
3
Press
[Default Setup]
on the scope’s front panel.
4
Press
[Help]
; then press the
Training Signals
softkey.
5
Using the Entry knob, select the
I
2
C
signal; then press the
Output
softkey
to turn it on.
6
Set channel- 1 to
1.00 V/div
.
7
Press the
[2]
front panel key to turn on channel- 2.
8
Set channel- 2 to
1.00 V/div
.
9
Set channel- 2’s offset/position to
+3.50 V
.
10
Push the trigger level knob to set the trigger level to approximately
50%
.
11
Set the scope’s timebase to
500.0 µs/div
.