Hi At least 90% of the units worked fine. Of the other 10% some of the issues were pretty minor. I only have seen one or two that would not lock.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dr. David Kirkby Sent: Thursday, July 14, 2011 4:47 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Worst possible error on a rubidium On 07/14/11 01:27 PM, Bob Camp wrote: > Hi > > I've looked at a random sample of a couple dozen Rb's that are in the 5 to > 30 year old range. In about 90% of the cases I'm reasonably certain they > haven't been adjusted since they left the factory. If they still worked, > they all came in at or below +/- 3x10^-9. > > Bob Thank you. Of the couple of dozen, how many worked? Clearly if only two worked, the data is not very useful. But if 15 or more worked, then it's interesting. It would give me reasonable confidence the unit is sufficient for my needs without bothering with calibration. I do have a friend with a GPS locked rubidium. At some point I'll get the unit to him, but I recently sold my HP 5370B to someone on this list (regretting I sold it now!) I guess a scope would be OK to check for gross errors by one 10 MHz signal to the X input and another to the Y input. -- A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? _______________________________________________ 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.
