40
3000 X-Series Oscilloscopes Advanced Training Guide
3
Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs
Lab #7: Triggering on a Digital Burst using Trigger Holdoff
Signals in the real world of electronics are rarely as simple as repetitive
sine waves and square waves. Establishing unique trigger points on more
complex signals sometimes requires using trigger “hold- off”. In this lab you
will learn how to use the scope’s trigger hold- off capability in order to
trigger on a burst of digital pulses.
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
signal; then press the
Output
softkey to turn it on.
5
Set channel- 1’s V/div setting to
1.00 V/div
.
6
Set channel- 1’s offset/position to approximately
+1.7 V
in order to
center this waveform on the scope’s display.
7
Push the Trigger Level knob to automatically set the trigger level to
approximately
50%
.
8
Set the scope’s timebase to
20.00 µs/div
.
Figure 22 Attempting to view a burst of pulses while using the scope’s default trigger
setup conditions.