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Allan deviation in 53220A. Fractional or absolute?

Question asked by tmg1985 on Nov 30, 2018
Latest reply on Jan 14, 2019 by tmg1985

Is the Allan deviation in 53220A calculated in terms of fractional frequency, or absolute frequency? It shows no units so I suspect is fractional frequency, but I have seen pictures of the 53230A on google with Hz units. Then, I suspect the 53220A uses fractional frequency for the Allan deviation, while the 53230A uses absolute frequency for the Allan deviation. Can someone confirm if this is true?