Interpretation of value Allan variance is defined as one half of the time average of the squares of the differences between successive readings of the frequency deviation sampled over the sampling period. The Allan variance depends on the time period used between samples, therefore, it is a function of the sample period, commonly denoted as τ, likewise the distribution being measured, and is displayed as a graph rather than a single number. A low Allan variance is a characteristic of a clock with good stability over the measured period.
Interpretation of value Allan variance is defined as one half of the time average of the squares of the differences between successive readings of the frequency deviation sampled over the sampling period The Allan variance depends on the time period used between samples therefore it is a function of the sample period commonly denoted as τ likewise the distribution being measured and is displayed as a graph rather than a single number A low Allan variance is a characteristic of a clock with good stability over the measured period