Hi Bob, Can You explain what 10 PPT stands for. Thank You
________________________________ From: Bob Camp <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Thu, January 21, 2010 7:50:43 AM Subject: Re: [time-nuts] LPRO Pressure Sensitivity Hi Yes indeed. There really isn't a lot of data out there on pressure on rubidiums. Of course we don't talk about it a lot on our data sheets either ... If you accept that a normal day might have a 100 millibar change, That changes the frequency 10 ppt, if the guess is right. At 10X that level it would be as significant as temperature on a good unit. If it was that big it should get a lot more attention ... Bob On Jan 21, 2010, at 4:53 AM, Magnus Danielson wrote: > Bob Camp wrote: >> Hi >> Has anybody taken any data on LPRO's to see what their pressure sensitivity >> is? I'm guessing it's ~ 0.1 ppt / millibar. That's only a guess backed up >> by no data at all .... > > Do you mean 1E-13 per millibar? (I am only guessing) > > 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. _______________________________________________ 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.
