Magnus. Thanks. If I understand, this reduces to a measurement of frequency stability along a measurement of phase noise?
Jeff -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Magnus Danielson Sent: Sunday, September 22, 2013 7:47 AM To: [email protected] Subject: Re: [time-nuts] How To Measure Long Term Phase Stability Of An Oscillator On 09/22/2013 01:30 PM, W3KL wrote: > How does one make a measurement of the phase stability of an > oscillator over a time period much larger than the oscillator period? > For example, I have an oscillator with a frequency of 4 MHz and I want > to measure the phase drift of the RF between a given point in time and > then a time 4 seconds later. I want to make a measurement that has a > precision of 0.1 degree or better. You want to measure a drift of 4/(4E6*3600) = 278 ps. You systematic frequency error can be at maximum 1.39E-10 relative, For your noise side look at TDEV at tau of 4 s, multiply that number by at least three and it should when added with peak frequency error be below 278 ps. Cheers, Magnus _______________________________________________ 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.
