See also: "SC-Cut Quartz Oscillator Offers Improved Performance", page 20-29 <www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1981-03.pdf> including "The SC Cut, a Brief Summary", page 22 Info on Jack Kusters, including a large list of his papers, here: <http://www.ieee-uffc.org/frequency_control/memoria.asp?name=kusters> /tvb

you can probably cite from the time-nuts archive jim s <jws@jwsss.com> wrote: > >On 9/11/2012 10:01 AM, Richard (Rick) Karlquist wrote: >> The SC cut crystal is generally credited to Jack Kusters >> (of HP) and Errol Ernisse. The story was something like >> Errol proposed the concept and Jack actually made the >> first one, which was quite non-trivial. >> Jack used to joke that "SC" stood for Santa >> Clara. (Jack and I worked for the old HP Santa Clara >> Division). Jack, along with Charles Adams and Jim Collin, >> produced 100's of thousands of SC cut crystals and taught the >> rest of the industry how to make them. Jack was very >> particular about making them "correctly" in terms of >> angle of cut, etc. He was really proud of his X-ray >> system that was accurate to 2 arc-seconds. This was >> instrumental in being able to actually fabricate "true" >> SC cut crystals. >> >> Rick Karlquist N6RK >If there is a web citation of this, I can edit the article and add the >citation and information. I don't like any of the citations in the >section about SC cuts because none of the verbiage is still visible and > >as you mention the critical information as to the origin is missing >after stating it originated in 1974. At the least a citation with >Rick's info and a date would be better in the first sentence if it is >online. > >I hate that they require online citation, but have no way of ensuring >you can go to the source material even given the link. There is a >peeing >contest ongoing about that on another thread and list which is why I'm >responding here.these bits of information from you guys who probably >know better than most are not considered the "best" source, which I >think is silly. > >jim > >_______________________________________________ >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. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things.

On 09/12/2012 01:55 AM, Azelio Boriani wrote: > Useful: I have found other papers on the Kalman filter applied to clock > estimation. Thank you, Magnus. You are welcome, I actually just followed through on Rick's hint as I know there is useful info there, and I wanted to show it more clearly. I don't recall if I read those Kalman filter papers. What do you want to do? Cheers, Magnus

Write a model of the OCXO, use the Kalman filter to generate the steering data so that they are cleaner and drive the DAC more frequently. On Thu, Sep 13, 2012 at 12:05 AM, Magnus Danielson < magnus@rubidium.dyndns.org> wrote: > On 09/12/2012 01:55 AM, Azelio Boriani wrote: > >> Useful: I have found other papers on the Kalman filter applied to clock >> estimation. Thank you, Magnus. >> > > You are welcome, I actually just followed through on Rick's hint as I know > there is useful info there, and I wanted to show it more clearly. > > I don't recall if I read those Kalman filter papers. What do you want to > do? > > 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. >