[time-nuts] NIST Traceability [WAS: WWVB BPSK...]

michael batchelor batchelormr at yahoo.com
Sat Mar 24 13:25:14 UTC 2012



Charles wrote:

>And even with a WWVB reference, one needs an "internal
>measurement assurance program" to support a claim of traceability for
>the measurements that one makes.
Correct. You must not only maintain a laboratory condition for your lab, 
but you must keep - and validate - your phase data. Just having the lock 
light "ON" at the time of measurement is insufficient. I've run a metrology 
lab in the past, so the methods and procedures for both the electronic 
and mechanical standards aren't lost on me..

But having the oscillator broken is a dead-nuts failure.That's not lost on 
me either. 


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