Hi > On Jan 10, 2017, at 1:22 PM, Magnus Danielson <mag...@rubidium.dyndns.org> > wrote: > > Hi Bob, > > On 01/10/2017 12:20 AM, Bob kb8tq wrote: >> Hi >> >>> On Jan 9, 2017, at 5:09 PM, Jeremy Nichols <jn6...@gmail.com> wrote: >>> >>> In the late 1960s, Hewlett-Packard engineers worked up a program to have >>> the 5360A "Computing Pig" (so-called from its weight, 55 pounds without >>> plug-ins) compute a "fractional frequency standard deviation." It appears >>> to be similar to the Allen Deviation; I've never figured out the difference >>> and would appreciate hearing from someone with stronger math skills who can >>> explain the two. >> >> The 5360A did ADEV. It only started being called ADEV after a few years had >> passed. >> The 5360A program and it’s various quirks became the topic of a number of >> post paper >> questions in the early 1970’s. The main focus of most of the questions was >> on bandwidth >> limiting ahead of the counter. That question really didn’t get a proper >> answer for several >> more decades. > > I've not found much on that topic as I've searched. Care to point to a few > papers? > > I've been looking at it, and you get somewhat different formulas if you > consider the filter.
It never came up in a paper. It was a question asked from the audience every time the NIST guys presented an ADEV paper. After a while it got very predictable in terms of who would stand up and ask what. Bob > > Cheers, > Magnus > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
