Hi Separate reply because it is a very different case:
If you are doing ADEV for longer tau, you *do* indeed use case A. You simply throw away 9 out of 10 samples when going from 1 second tau to 10 seconds. There are a number of papers out there on just why this is the correct thing to do in this case. Bob > On Jan 10, 2019, at 1:24 PM, Dana Whitlow <k8yumdoo...@gmail.com> wrote: > > I'm confused... > > I see two separate cases here: > > Case A: you simply throw away samples, keeping only every nth sample, > without > regard for the frequency content of the original signal. > > Case B: you first perform appropriate anti-aliasing filtering on the > original signal, and > only then throw away all but every nth sample> > > Which casee are we talking about when we use the word "decimate"? And > then what > is the correct terminology for the other case? Inquiring minds really > want to know... > > Dana > > > On Thu, Jan 10, 2019 at 11:49 AM Gerhard Hoffmann <dk...@arcor.de> wrote: > >> >> Am 10.01.19 um 17:33 schrieb Bob Martin: >>> >>> >>> Back in those same seventies, I was working for an army lab (Harry >>> Diamond Labs) as a summer student. I saw a picture in a lab supply >>> catalog of a (ein) stein of beer. I tore it out and taped it over a >>> picture off Albert Einstein that a German physicist, Howard Brandt, >>> had on the wall over his desk. This was a bad idea. Howard was so >>> incensed that he called the whole department together, hauled out the >>> Websters Unabridged Dictionary, and forced me to read the definition >>> of the word philistine in front of the group. Fortunately, there were >>> many entries under the word and I chose "a native of Philistia" to >>> read out loud. The moral is words can have many meanings and, more >>> importantly, don't make fun of Einstein >>> around German Physicists. >>> >> I wonder if Howard even understood the intended pun. >> >> >> Stein means stone, nothing else. I have seen/heard it used in the >> >> sense of a "mug for beer" only by Americans. The closest >> >> German word would be Steinkrug, but only if you want to >> >> emphasize that the Krug is made of ceramics and not of glass. >> >> >> Decimation apart of the Roman sense for me is only throwing away samples, >> >> and the need for filtering goes with it even without explicitly saying. >> >> >> Cheers, Gerhard >> >> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.