Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

2007-12-08 Thread Chris Cheney
Cambridge University Press, which is a non-profit company. I am unsure of the relevance of the above statement but, being pedantic (as befits time-nuts): Cambridge University Press is part of the University of Cambridge [see http://www.admin.cam.ac.uk/univ/so/so_statj.pdf], and the

Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

2007-12-07 Thread Enrico Rubiola
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:

[time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

2007-12-06 Thread Martyn Smith
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

Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

2007-12-06 Thread Richard (Rick) Karlquist
Why do you say there's room for another supplier? 5 years ago there were 3 suppliers, but Agilent sold out to Symmetricom. What unmet need are you proposing to fill? What is the short term stability (sigma-sub-y-of-tau) of your world class oscillator? Rick Karlquist (RF designer for the 5071A

Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

2007-12-06 Thread Bruce Griffiths
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

Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

2007-12-06 Thread Jeff Mock
It sounds like a really nice oscillator. I'm sure that everyone would love to hear about the challenges and tradeoffs in designing such a high performance quartz oscillator. Do you guys cut your own crystals? How much of the improvement comes from a better SC-cut crystal and how much from