From: John Ackermann N8UR <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Frequency processing scheme of HP5065 vapour rubidium standard Date: Mon, 06 Nov 2006 11:11:56 -0500 Message-ID: <[EMAIL PROTECTED]>
> Ulrich Bangert wrote: > > > Agreed! But you are talking about things that happen INSIDE the physics > > package, don't you? Ok, let us assume that there WERE big differences in > > the physics packages that need to be compensated for. In THIS case the > > tunable synthesizer would indeed make sense and even more the printed > > synthesizer settings on the physics packages! If this were the only > > information available, i would immediatly agree to you! > > Ulrich, one thing that hasn't been mentioned is that back in the ancient > days, before leap seconds, UTC was "corrected" by applying a frequency > offset that changed annually. IIRC, it was typically something like > 300x10e-10. > > I think the main use of the adjustable synthesizer was to allow you to > dial in that offset. > > I believe that in later versions of the 5065A, the thumbwheel setting > was removed because after leap seconds came along the need to adjust the > frequency annually went away. My 5065A is a very late one and I don't > think it has those thumbwheels (but I'm not going to take it out of the > rack to find out...). This makes sense. I think John nailed it. Cheers, Magnus _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
