[time-nuts] Allan deviation plots etc
EWKehren at aol.com
EWKehren at aol.com
Tue Aug 4 13:49:27 UTC 2009
With u processors and flash memory it would be easy to build a counter that
over time counts the frequency, it would be totally autonomous, the
reference has to be connected all the time. Connection to a PC would be done when
necessary or a memory stick would be inserted, data transferred and then
inserted in a PC. Bert Cost less than $ 100. Bert
In a message dated 8/4/2009 9:38:36 A.M. Eastern Daylight Time,
wpxs472 at gmail.com writes:
Ulrich Bangert wrote:
my point has not been to judge who has to be interested in what. My point
has only been to use the right terms for it. Let me give an example: John
uses the term
> ...but I am more concerned with ... and stability over time
Well, stability over time is what exacly is displayed in a
tau-sigma-diagram
of an oscillator. Since only a few words before he is saying that he is NOT
intersted into Allan Deviation plots, then he is perhaps interested into
something else?
Allan deviation plots are interesting and if I had the means to generate
them, I certainly would. Since I don't, I find it easier to interest myself
in ways to try to measure oscillator performance in practical terms with
the equipment at hand. What I would really like is to be able to produce a
specification in the same form as the oscillator manufacturers. I am used
to
data in that form and while the Allan deviation gives somewhat the same
data, I rarely see one that gives a clue to stability over a year or 10
years. Most of the ones I see seem more concerned with seconds to hours and
maybe weeks at most. Of course, my method won't give any clue as to how an
oscillator will perform over years either.
I hope this clears things up a bit.
_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
**************A Good Credit Score is 700 or Above. See yours in just 2 easy
steps!
(http://pr.atwola.com/promoclk/100126575x1222846709x1201493018/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072&hmpgID=115&bcd
=JulystepsfooterNO115)
More information about the Time-nuts_lists.febo.com
mailing list