When you set up the jitter analysis, it finds the crossing points of the signal (either rising or falling or both) during the PSS interval itself. If you were to plot the PSS time domain results (not the tstab, which is what you're showing above), then the event times correspond to the crossing points during that time domain period. If there's only a single pulse, and you've asked for both, there will be two crossing points (one for rising and one for falling). The jitter is calculated using the noise at the output of an ideal sampler which samples at exactly the threshold crossing combined with the slew rate (at the threshold crossing) from the PSS analysis. That's what the "Threshold Xing" shows on the direct plot form. Regards, Andrew.![]()
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