[time-nuts] One Kg Quartz Resonator

Bob Camp lists at rtty.us
Thu Jan 24 15:03:42 EST 2013


Hi

If the standard *only* functions unreachable conditions, then you have no
standard. 

The point is that you do operate them under normal conditions, and then
correct the result as required. I do not know of any primary standards that
are totally un-influenced by their environment in any way. That of course
doesn't mean there are none...

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Chuck Harris
Sent: Thursday, January 24, 2013 2:40 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] One Kg Quartz Resonator

Hi Bob,

It seems to me that all of our current primary standards
are only functional under the ideal nominal conditions.

Which ones aren't?

-Chuck Harris

Bob Camp wrote:
> Hi
>
> If you take the position that a primary standard is only functional if
it's
> under the ideal nominal conditions - you have no primary standards at all.
> They all require corrections of one sort or the other. Having a system
with
> no standards is not a system at all...
>
> The practical approach is to define the ideal conditions in a way that you
> can indeed correct back to them. The most common way is to take the
> contribution to zero. There obviously are other approaches. Regardless of
> weather you take it to zero or x.xxx the net result is the same, as long
as
> everybody does the same thing.
>
> Bob
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