At 7:20, when you speak about short-term stability: The Morion datasheet shows Allan

**deviation** figures, while the CSIRO rubidium datasheet shows Allan

**variance**. According to the

Wikipedia article, ADEV

^{2} = AVAR, so the figures from the two datasheets are not directly comparable.

But then again, if we do the calculation, the Allan variance (at 1s) of the Morion OCXO would be <4*10

^{-24}, which just doesn't sound right, compared to the Allan variance of the CSIRO RbXO (<2*10

^{-11}). Can we assume that they screwed up the Morion datasheet and they actually meant to write Allan variance?

Would anyone knowledgeable in the field be willing to comment on this?