Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs
3
3000 X-Series Oscilloscopes Advanced Training Guide
61
Lab #12: Triggering on Setup & Hold Time Violations
In this lab we will set up the scope to trigger on a Setup & Hold time
violation. We will also use the scope’s Segmented Memory acquisition to
capture multiple and consecutive occurrences of Setup & Hold time
violations.
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
Setup & Hold Violation Signals
signal; then
press the
Output
softkey to turn it on.
6
Press
[Auto Scale]
.
You should now see on your scope’s display waveforms similar to
. The channel- 1 waveform (yellow trace) is a clock signal, while
the channel- 2 waveform (green trace) represents a random data signal
presented in an eye- diagram format. When clocking data into a memory
device, if the data signal is going to change polarity (high- to- low or
low- to- high), then it must switch polarities a minimum amount of time
before the occurrence of the clocking signal. This is commonly referred to
as the device’s minimum specified “setup” time. And then the data signal
Figure 41 Display of a clock signal (yellow trace) and data signal (green trace) in the form
of an eye-diagram.