Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
3000 X-Series Oscilloscopes Advanced Training Guide
85
Lab #17: Decoding, Triggering, and Searching on RS232/UART Serial Bus
Signals
In this lab you will learn how to set up the scope to decode and trigger on
transmit and receive RS232/UART serial bus traffic. In addition, you will
learn how to use the scope’s automatic RS232/UART Search & Navigation
capability, as well as Segmented Memory acquisition. This lab does not
provide a tutorial on the RS232/UART protocols and signaling. To complete
this lab, your scope must be licensed with the RS232/UART trigger and
decode option (Option COMP). 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
RS232/UART
signal; then press the
Output
softkey to turn it on.
6
Set channel- 1 to
1.00 V/div
.
7
Set channel- 1’s offset/position to
-1 V
.
8
Press the
[2]
front panel key to turn on channel- 2.
9
Set channel- 2 to
1.00 V/div
.
10
Set channel- 2’s offset/position to
+2.3 V
.
11
Push the trigger level knob to automatically set the trigger level to
approximately
50%
.
12
Set the scope’s timebase to
2.00 ms/div
.