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Clocks Forum Discussions

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 Cycle to Cycle type of jitter has a random (i.e. Gaussian) distribution, the tails of this distribution are unbounded, and therefore the "worst-case" jitter you'll see from any device will always increase the longer you measure it. This is just a simple fact of nature, and is common from all manufactured parts, at Cypress as well as other companies. This may give you an unsettled feeling at first, but keep in mind that although the worst-case jitter you measure with time will always increase, the probability of getting that jitter is always decreasing, so in the end, you should stop measuring jitter because the chance of seeing a larger jitter number is so small you'll have to wait days, weeks, years, to see an increase in the last measured "worst-case" jitter number.

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