Martyn, designing a Cs standard is not the job for a single man, yet I might help you to find frustrated scientists who worked on a Cs project (some 10 years ago I took a part in a project, designing damn impossible precision electronics).
About the noise of your quartz oscillator, not bad. Yet: Oscilloquartz 8607 has -128.5 dBrad^2/Hz at 1 Hz offset, at 5 MHz, which scales to -122.5 at 10 MHz, thus -125.5 dBc. Off the shelf, may have some delay. Rakon has -132 dBrad^2/Hz at 1 Hz offset, at 5 MHz, which scales to -126 at 10 MHz, thus -129 dBc. Small production for space, not sure you can actually buy it. In your oscillator, is the power dissipated by the quartz of 40 microwatts? Can you send a spectrum? I am getting great fun in reverse engineering the oscillator noise. The noise I mean, not the oscillator. This takes some 40-50 pages of my forthcoming book on phase noise and frequency stability in oscillators. You can't enter an order number, you must wait for Cambridge University Press, which is a non-profit company. Cheers, Enrico On 6 Dec 2007, at 15:12 , Martyn Smith wrote: > Hi, > > Is there anyone out there clever enough to design me a cesium > frequency standard?? > > There's only two manufacturers that I know of and there's room for > another supplier. > > Also you may be interested to read we have just developed what we > believe to be the worlds lowest close-in phase noise 10 MHz > oscillator. > > It makes -121 dBc/Hz @ 1 Hz. Noise floor is only -162 dBc/Hz at > the moment, but we are working on reducing this a further 5 to 10 dB. > > Enter your order number here...... > > Best Regards > > Martyn > > This Email is from: > > Martyn Smith > Precision Test Systems LTD > Tel: +44 (0) 1245 329608 > Email: [EMAIL PROTECTED] > Web: www.ptsyst.com > > _______________________________________________ > 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. Enrico Rubiola professor of electronics web: http://rubiola.org e-mail: [EMAIL PROTECTED] FEMTO-ST Institute 32 av. de l'Observatoire 25044 Besancon, FRANCE voice: +33(0)381.853940 (E.Rubiola) voice: +33(0)381.853999 (switchboard) fax: +33(0)381.853998 _______________________________________________ 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.