Howtosignalprocessing
- How do you interpret Allan variance?
- How do you measure Allan deviation?
- What are the units of Allan deviation?
How do you interpret Allan variance?
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.
How do you measure Allan deviation?
The beat frequency method is the standard method to measure Allan variance, or more precisely to measure the frequency deviation of the DUT from the frequency standard. The total power at the respective offset frequency is read from the spectrum analyzer display.
What are the units of Allan deviation?
Allan Deviation is a unitless measure of stability, typically used to quantify the stability of clocks and other oscillators.
