Fractional Frequency

Some articles on fractional frequency, frequency:

Allan Variance - Supporting Definitions - Average Fractional Frequency
... The average fractional frequency is defined as where the average is taken over observation time τ, the y(t) is the fractional frequency error at time t and τ is the observation time ...
Allan Variance - Supporting Definitions - Fractional Frequency
... The fractional frequency y(t) is the normalized delta from the nominal frequency vn, thus ...

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