[time-nuts] Counter averaging errors near clock harmonics

Charles Steinmetz csteinmetz at yandex.com
Fri Apr 10 15:27:57 EDT 2015


The subject of errors in averaging counters at input frequencies near 
the clock frequency and its subharmonics and harmonics comes up on 
the list from time to time.  There is a nice discussion of the 
phenomenon, and how it was addressed in the design of the HP 5345A 
counter, in the June, 1974 issue of the Hewlett-Packard Journal:

David C. Chu, "Time Interval Averaging: Theory, Problems, and 
Solutions," HP Journal v25 n10, June 1974

<www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1974-06.pdf>

Best regards,

Charles





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