Hi One way of looking at that:
Back in 2003 or 2004 it left the factory exactly on frequency with a "zero" setting. (I'm betting there's a factory calibration register in there ..). You fire it up in seven years later and it's moved 5x10^-11. More or less it's drifted < 1x10^-11 per year. Comes out to about 6x10^-13 per month. That's all based on a *lot* of wild guesses. Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, January 12, 2012 6:58 PM To: [email protected] Subject: Re: [time-nuts] FE-5680A Mechanical Question Nigel I did not program it, it had its original setting and it is 9.99999999944 which is -5.6 E-11, within 10 MHz which is within spec. Once I have some aging I will look at Voltage sensetivity. Bert Kehren In a message dated 1/12/2012 6:22:02 P.M. Eastern Standard Time, [email protected] writes: Hi Bert Could you clarify something for me please, before you started your tests did you program the unit to be close to 10MHz or did you leave it as received, and if so what is the actual frequency and is it stable? regards Nigel GM8PZR In a message dated 12/01/2012 21:50:28 GMT Standard Time, [email protected] writes: I hear all these ideas from paper tigers. How about building something and report on it. I can do a Shera for $ 40 and add a $ 20 GPS. And it works. I did fail to mention that I also have retrace data. Over the test period I had at least 10 power outages from seconds to a couple of hours. The Rb goes right back to 1 E-12. It would be nice if some one independent does a test on aging, maybe I was lucky and got a particularly good unit. _______________________________________________ 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.
