[time-nuts] HP5071 (was: GENIUS by Stephen Hawking (PBS TV))

[Attila Kinali]

Hoi Rick

On Sat, 21 May 2016 10:02:50 -0700
"Richard (Rick) Karlquist" <richard at karlquist.com> wrote:

> I was on the 5071A design team 25 years ago.  I designed most of the RF
> sections.  We analyzed all known environmental effects (they were
> known from experience with the 5061) and, using newer digital
> technology, the individual effects where budgeted to better than
> 10^-14 each, and in most cases much better.  Len Cutler insisted!
> It was refreshing to have a manager who didn't believe in "good enough".

I'd give a lot to read the design documents of the 5071.
There must be a lot of knowhow and techniques in them.


> This budgeting was to address ABSOLUTE accuracy.  We feel we proved
> that absolute accuracy was mainly limited to end to end phase shift
> in the Cs cavity.  Proprietary techniques were used to reduce this to
> values equivalent to a mechanical asymmetry of a small fraction of a
> "mil" (1/1000 inch).

What reference did you use to measure its absolute accuracy?
Did you have access to the NIST standards?

			Attila Kinali 

-- 
Reading can seriously damage your ignorance.
		-- unknown