[time-nuts] WWVB Now a Monopoly

J. Forster jfor at quikus.com
Thu Sep 27 23:32:07 UTC 2012


In the real world, if GPS does not work, the WWVB change means you either
have to buy the XW stuff or go do something else.

YMMV

-John

=================



> On 9/26/12 7:11 PM, J. Forster wrote:
>> But if someone here designed and built a $100 receiver and offered it to
>> the group, that could well violate some of their IP.
>>
>> As to building a home brew receiver and certifying a onsie so your lab's
>> cal is traceable, I'd certainly not trust a cal done that way.
>>
>> Doing spacecraft communications is hardly the same thing.
>>
>
>
>
> Well..if you're trying to do NIST traceable cals in a legally acceptable
> way, then it's very unlikely that any homebuilt receiver that infringed
> the patent would be acceptable, from a patent standpoint. The general
> exemption to practice the invention is for development of a new
> invention, not to make use of it for other reasons (otherwise, the
> patent wouldn't be particularly useful in terms of exclusivity).
>
> OTOH, if you cobble up a (non-infringing) receiver and validate its
> performance analytically, why wouldn't that be acceptable for a
> traceable calibration.  It's no different than using a homebuilt quartz
> oscillator as a transfer standard, is it?
>
> Now, if you're selling calibration services, it would be a tougher sell
> to your customers: they'd have to believe in your analysis or oscillator
> building. This is in the sense that if I use a HP 105, the long history
> and tradition of HP is essentially standing behind the design and the
> published performance standards; a homebuilt standard has a higher bar
> for the great unwashed public.
>
> If you want traceability for, say, a journal article, then I think the
> bar is set differently.  For state of the art stuff, the article usually
> describes the calibration approach, and it's up to the reader to decide
> if you did it adequately.
>
>
>
>
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