On 28/09/2014 17:44, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
BTW, you may note Keysight's uncertainty for measurement of the 10 MHz
reference in September 2014 is 0.0010 Hz, whereas Agilent's was
0.00080 Hz in August 2013. They 5071A primary frequency standard. I
assume the fact that the ID number is UK13623 on both certiciates,
means it is actually the same standard, rather than two of the same
model number.
It seems the same unit, I doubt they will maintain the ID if replacing
it, but it has been re-cablibrated between both certificates, so its
uncertainity has evolved from the previous calibration to the last one.
Regards,
Javier
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