TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual
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Limit Testing
Limit testing automatically compares each incoming or math (TDS 510A only)
waveform against a template waveform. You set an envelope of limits around a
waveform and let the digitizing oscilloscope find waveforms that fall outside
those limits (see Figure 3–33). When it finds such a waveform, the digitizing
oscilloscope can generate a hardcopy, ring a bell, stop and wait for your input, or
any combination of these actions. This section describes how to use limit testing.
Figure 3–33: Comparing a Waveform to a Limit Template
To Create a Limit Test Template
To use an incoming or stored waveform to create the limit test template, first
select a source:
1. To access limit testing, press SHIFT ACQUIRE MENU to bring up the
Acquire menu.
2. Press Create Limit Test Template
(main) ➞ Template Source (side) ➞
Ch1, Ch2, Ch3, Ch4, Math1, Math2, Math3, Ref1, Ref2, Ref3, or Ref4
(side).
NOTE. The template will be smoother if you acquire the template waveform using
Average acquisition mode.
Once you have selected a source, select a destination for the template.
3. Press Template Destination
(side) ➞ Ref1, Ref2, Ref3, or Ref4.
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