Pete, That's my point.
Tom has plotted Allan Variance. I have plotted frequency accuracy. I get similar Allan Variance results to Tom. But if I just measure the accuracy, e.g peak to peak frequency variations, rubidium's out- perform OXCO's even when both are disciplined to GPS. I hope I'm not being stupid here. I measure frequency accuracy using my Stanford SR620 in time AB mode and calculate the frequency error. My accuracy floor noise is 2E-11/sec. When measuring an OXCO based unit I often get frequency errors of plus/minus 5 milli hertz. Rubidium units (mine and Symettricom) never has errors > 1 milli hertz. Best Regards Martyn _______________________________________________ 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.
