Technical data

Oscilloscope Familiarization Labs 2
4000 X-Series Oscilloscopes Advanced Training Guide 39
Because the InfiniiVision oscilloscope’s mask testing capability is
hardware-based, it can test over 200,000 waveforms/sec and provide
detailed pass/fail statistics including failure rate in terms of both percent
and a Sigma quality factor as shown in Figure 20. A Sigma quality factor
of 6
σ relates to approximately three or fewer defects per million tested.
Because this particular glitch occurs 1/1,000,000, we have a Sigma quality
factor that exceeds 6
σ. Let’s now set up the oscilloscope to stop on the
first detected failure.
13 Press [Run/Stop] to stop acquisitions.
14 Press the (Back) key.
15 Press Statistics.
16 Press Reset Statistics to clear the statistics from the previous test.
17 Press the (Back) key.
18 Press Setup.
19 Press On Error – Stop two times.
20 Press [Run/Stop] to begin a new “Stop-on-Error” test.
Figure 20 Mask Testing provides us within detailed statistics about the rate of occurrence
of the infrequent glitch.
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