[time-nuts] Performance verification for time counters

Bob kb8tq kb8tq at n1k.org
Wed Nov 29 18:57:21 EST 2017


The key point here is the term “demonstrating”. When you get to 0.001 Hz it takes 
more than just a little time. Not very compatible with a production line. Yes you *might*
ask “would anybody ever want that demonstrated ? “. The answer is yes, there are people 
out the that need it demonstrated. It’s not cheap to do.


> On Nov 29, 2017, at 6:47 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> --------
> In message <9793F6FA-CB78-4BF1-BC80-6B1A593FC259 at n1k.org>, Bob kb8tq writes:
>> Needless to say *demonstrating* this 0.001 db sort of gain flatness on a repeater 
>> out to crazy low frequencies is a bit involved. It *is* a great gig if you happen to be 
>> a consultant ...
> No consultants were involved, they did it in mass production at WE.
> Remember, they needed thousands of repeaters per *coax* and there were
> handfulls of coax'es in each cable.
> This is the relevant article about the amplitude:
> 	https://archive.org/details/bstj53-10-1935
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe    
> Never attribute to malice what can adequately be explained by incompetence.

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