[time-nuts] Timing Health Monitoring

[Chris Hoffman, KG6O]

Ah! The very height of elegance in a good design [imho] : no upgrade needed.

-CH

On Jul 19, 2012, at 12:40, Magnus Danielson <magnus at rubidium.dyndns.org> wrote:

> On 07/19/2012 05:48 PM, Chris Hoffman wrote:
>> Richard,
>> 
>> This paper is fascinating to me. I finally understand how the TMDE/Metrology lab to which I continually sent my measurement equipment for calibration was so important.
>> 
>> Looking back, I recall something that looked exactly like an FMS rack shown in the paper! It was accompanied by a make-shift cubicle with walls of HP and Marconi gear in various states... and a sweet, aged, bearded geek with trifocals...
>> 
>> It's telling, I think, that the first FMS was built on an Apple II.
> 
> The NIST time-scale algorithm was run on a PDP-8 with 5kWord memory. It used to run on a pair of AT machines, but they have upgraded to a pair of 386s now. Every 12 min they will execute for 40 s and then go back to idle waiting. Processing-wise, there is no need to get more modern machines.
> 
> Can't recall seeing that paper, so thanks for the reference. Had a nice chat with one of the techs dealing with those services. Very nice folks!
> 
> Cheers,
> Magnus
> 
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