[time-nuts] HP 5370B

[Mike S]

At 09:22 AM 5/10/2008, Didier Juges wrote...
>Most microwave network analyzers have amplitude
>resolution of 0.01dB, while their accuracy is just around 1dB in most 
>cases.
>
>I have had to argue too many times that a piece of equipment with a 
>2dB p-p
>requirement on flatness was just fine when it measured 2.01dB on the 
>HP
>network analyzer. I would not have gotten in that argument if the data 
>had
>been 1.99dB. Go figure.

I figure you're both wrong. If the measuring instrument is no better 
than 1 dB absolute, you can't expect to do it - a flat line measurement 
could represent an actual + or - 1 db, the limit of the spec.