David Lee
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Classically, aperture jitter (absolute jitter) is used for evaluating ADC's SNR.
However, suppose you plan to differentiate the waveform, i.e. take the difference of every two adjacent samples. Then use period jitter.
Suppose you plan to take the sum of every two samples that are eight samples apart. Then use 8-period jitter.
In real life, which jitter metric (absolute jitter, period jitter, cycle to cycle jitter - aka adjacent period jitter, etc.) matters is a function of the actual data processing to be done on the data samples, and is circuit dependent.
David.
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