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, [email protected] 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 -- [email protected] 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) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
