[time-nuts] Why would Keysight UK uncertainty measuring 1 MHz be as high as 7.6 Hz?

Dr. David Kirkby (Kirkby Microwave Ltd) drkirkby at kirkbymicrowave.co.uk
Sat Aug 29 04:01:37 EDT 2015

On 28 Aug 2015 23:05, "Oz-in-DFW" <lists at ozindfw.net> wrote:
> The uncertainly listed seems to be 7.6 mHz (milliHertz, or .0076 Hz.  A
> bit better that you mention..

No, please look again.

The first line does show an uncertainty of 7.6 mHz, but that is when the
LCR meter was set to 1 kHz. The last line shows an uncertainty of 7.6 Hz
(1000x higher) when measuring 1 MHz, which is obviously 1000x higher in
frequency than 1 kHz. So the original uncertainty I quoted was correct.
The uncertainty rises proportionately with frequency.



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