[time-nuts] HP 5370B

John Miles jmiles at pop.net
Sun May 11 00:50:30 UTC 2008


> "I have never had a piece of equipment rejected because a reading was
> 1.99 for a spec of 2 max"
>
> The statements were made with regard to instrument
> resolution/accuracy/precision. Clearly, measuring 2.01 (or 1.99) on an
> instrument with an accuracy of 1 does not allow compliance with a
> specification of 2 to be met.

Accuracy ratings for digital displays are commonly specified as a percentage
+/- 1 LSD.  So given tolerances of +/- 1 dB +/- 1 LSD for the analyzer and
+/- 1 dB for the DUT, 2.01 dB is technically within spec.

-- john, KE5FX





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