[time-nuts] typical phase nosie and ADEV plot of an OCXO
Hi, I'm currently writing a short article on crystal oscillators and am looking for plots of typical phase noise and ADEV of an OCXO. But unfortunately, i couldnt find any, so far. Only discrete numbers from the data sheets, or phase noise plots only from scientific papers. Does anyone have something like this at hand? Attila Kinali -- The trouble with you, Shev, is you don't say anything until you've saved up a whole truckload of damned heavy brick arguments and then you dump them all out and never look at the bleeding body mangled beneath the heap -- Tirin, The Dispossessed, U. Le Guin ___ 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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
On 3/14/2012 6:22 AM, Attila Kinali wrote: Hi, I'm currently writing a short article on crystal oscillators and am looking for plots of typical phase noise and ADEV of an OCXO. But unfortunately, i couldnt find any, so far. Only discrete numbers from the data sheets, or phase noise plots only from scientific papers. Does anyone have something like this at hand? Attila Kinali Attila, TVB and I each have a bunch of plots of various oscillators at our web sites. Tom's are mainly under http://www.leapsecond.com/pages and http://www.leapsecond.com/museum; mine are under http://www.febo.com/pages and particularly http://www.febo.com/pages/oscillators. John ___ 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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
And don't forget the usual PDF http://gpstime.com/files/tow-time2011.pdfwhere you can find the comparison of typical Allan Deviations from various clocks on page 7. On Wed, Mar 14, 2012 at 1:52 PM, John Ackermann N8UR j...@febo.com wrote: On 3/14/2012 6:22 AM, Attila Kinali wrote: Hi, I'm currently writing a short article on crystal oscillators and am looking for plots of typical phase noise and ADEV of an OCXO. But unfortunately, i couldnt find any, so far. Only discrete numbers from the data sheets, or phase noise plots only from scientific papers. Does anyone have something like this at hand? Attila Kinali Attila, TVB and I each have a bunch of plots of various oscillators at our web sites. Tom's are mainly under http://www.leapsecond.com/**pageshttp://www.leapsecond.com/pagesand http://www.leapsecond.com/**museum http://www.leapsecond.com/museum; mine are under http://www.febo.com/pages and particularly http://www.febo.com/pages/**oscillatorshttp://www.febo.com/pages/oscillators . John __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
On Wed, 14 Mar 2012 08:52:14 -0400 John Ackermann N8UR j...@febo.com wrote: Attila, TVB and I each have a bunch of plots of various oscillators at our web sites. Tom's are mainly under http://www.leapsecond.com/pages and http://www.leapsecond.com/museum; mine are under http://www.febo.com/pages and particularly http://www.febo.com/pages/oscillators. Blub.. had a look, both at your websites, but couldn't find them. I guess i had tomatos on my eyes. Thanks a lot! Attila Kinali -- The trouble with you, Shev, is you don't say anything until you've saved up a whole truckload of damned heavy brick arguments and then you dump them all out and never look at the bleeding body mangled beneath the heap -- Tirin, The Dispossessed, U. Le Guin ___ 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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
On Wed, 14 Mar 2012 14:05:03 +0100 Azelio Boriani azelio.bori...@screen.it wrote: And don't forget the usual PDF http://gpstime.com/files/tow-time2011.pdfwhere you can find the comparison of typical Allan Deviations from various clocks on page 7. That's for an other article :-) This time, i write only about crystal oscillators and their perfomance, if you need a bit more than just the 20-50ppm you get out of a standard crystal. The article will be geared down for decision makers who have a bit of technical background, but not too much, so it wont contain any fancy information anyone who's been here for more than a couple of months doesn't already know :-) Attila Kinali -- The trouble with you, Shev, is you don't say anything until you've saved up a whole truckload of damned heavy brick arguments and then you dump them all out and never look at the bleeding body mangled beneath the heap -- Tirin, The Dispossessed, U. Le Guin ___ 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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
Programs that try to turn text into a link will get the URL wrong due to a missing space. Fixed link: http://gpstime.com/files/tow-time2011.pdf On Wed, Mar 14, 2012 at 09:05, Azelio Boriani azelio.bori...@screen.it wrote: And don't forget the usual PDF http://gpstime.com/files/tow-time2011.pdfwhere you can find the comparison of typical Allan Deviations from various clocks on page 7. ___ 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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
On 3/14/12 6:23 AM, Attila Kinali wrote: On Wed, 14 Mar 2012 14:05:03 +0100 Azelio Borianiazelio.bori...@screen.it wrote: And don't forget the usual PDF http://gpstime.com/files/tow-time2011.pdfwhere you can find the comparison of typical Allan Deviations from various clocks on page 7. That's for an other article :-) This time, i write only about crystal oscillators and their perfomance, if you need a bit more than just the 20-50ppm you get out of a standard crystal. The article will be geared down for decision makers who have a bit of technical background, but not too much, so it wont contain any fancy information anyone who's been here for more than a couple of months doesn't already know :-) Attila Kinali John Vig's presentation is a great place to start.. There's lots of copies in various places on the web (IEEE UFFC site, for one) ___ 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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
On 03/14/2012 11:22 AM, Attila Kinali wrote: Hi, I'm currently writing a short article on crystal oscillators and am looking for plots of typical phase noise and ADEV of an OCXO. But unfortunately, i couldnt find any, so far. Only discrete numbers from the data sheets, or phase noise plots only from scientific papers. Does anyone have something like this at hand? I know I should add one to the Wikipedia Allan Deviation article. Let me know if there is anything other which is missing in that article so I can add to it. What you should have is essentially a bath-tub curve with a 1/tau slope for the white phase modulation (WPM) noise, a roughly 1/sqrt(tau) slope from the flicker phase modulation (FPM) or white frequency modulation (WFM) and then a flat part due to the flicker frequency modulation (FFM). See the table in [1]. At higher tau the systematic effect of frequency drift comes in, and if included into the Allan Deviation it rises with tau [2]. As a systematic effect, it should not really be included into the ADEV plot, but you usually see it in practical measurements. [1] http://en.wikipedia.org/wiki/Allan_variance#Power-law_noise [2] http://en.wikipedia.org/wiki/Allan_variance#Linear_response The existence of WFM and FFM noises is due to the Leeson model. 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.
Re: [time-nuts] typical phase nosie and ADEV plot of an OCXO
On Wed, 14 Mar 2012 06:42:34 -0700 Jim Lux jim...@earthlink.net wrote: John Vig's presentation is a great place to start.. There's lots of copies in various places on the web (IEEE UFFC site, for one) Juup, that's where the idea for the article came from in the first place :-) And yes, there are many copies around, often of different versions. I recently uploaded the 4 versions i could find on the net on Didiers homepage. They have slight differnces, but not that many... Attila Kinali -- The trouble with you, Shev, is you don't say anything until you've saved up a whole truckload of damned heavy brick arguments and then you dump them all out and never look at the bleeding body mangled beneath the heap -- Tirin, The Dispossessed, U. Le Guin ___ 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.
