
44
3000 X-Series Oscilloscopes Advanced Training Guide
3
Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs
Lab #8: Triggering on Unique Pulses and Glitches using “Pulse-width”
Trigger
In this lab you will learn how to use the scope’s Pulse Width triggering
mode to trigger on pulses within a digital data stream that have unique
pulse widths, including an infrequently occurring glitch.
1
Connect the channel- 1 probe to the Demo 1 terminal and ground.
2
Press
[Default Setup]
on the scope’s front panel.
3
Press
[Help]
; then press the
Training Signals
softkey.
4
Using the Entry knob, select the
Digital Burst with Infrequent Glitch
signal;
then press the
Output
softkey to turn it on.
5
Set channel- 1’s vertical scaling to
1.00 V/div
.
6
Set channel- 1’s offset/position to approximately
+1.7 V
in center the
waveform on- screen.
7
Set the trigger level to
+1.00 V
(~1 division above bottom of waveform).
8
Set the scope’s timebase to
2.000 µs/div
.
You should now see on your scope’s display a digital burst waveform
consisting of six pulses of various widths, followed by an infrequent glitch
similar to
. Using the scope’s default Edge triggering mode, the
scope usually triggers on the 1st pulse of this burst. But if you increase
the scope’s waveform intensity to 100%, you will see that the scope
Figure 25 Capturing a digital burst using the scope’s default Edge triggering mode.