1/ There are no sources of constant frequency. Approximations to that goal may be measured by their cost.
2/ There is no single mechanism, unless it's quantum mechanics. Bill Hawkins This message has been fact checked by a 9 year old with a Twitter account. -----Original Message----- From: Bob Camp Sent: Thursday, March 04, 2010 11:05 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] nubie querie Hi The best answer to the second one is "That depends." There are *lots* of different oscillators out there. Earth - sun, Helium atom floating in space ... Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Don Collie jnr Sent: Thursday, March 04, 2010 8:14 AM To: [email protected] Subject: [time-nuts] nubie querie I`m not sure that questions like these is welcome on this list, but here goes anyway : 1/ What are the the 10 sources of the most constant [invariant] frequencies known to man, in order of decreacing constancy? Four immediately come to mind. 2/ What is the mechanism in an oscillator, that is responsible for phase noise? [In only one sentence please] If this is known, then it becomes easier to design low phase noise oscillators. I hope you enjoy these questions,.................................Don. _______________________________________________ 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. _______________________________________________ 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. _______________________________________________ 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.
