[time-nuts] HP 5370B

[Didier Juges]

I knew would get comments on that. I simply did not provide enough
information. I thought most everyone who has done it would know what I was
refering to.

Acuracy of these instruments is not one number, it is a 3 dimensional chart,
and time is the 4th dimension.

Forget I even mentioned it. I do not intend to go into an error analysis
now.

Didier 

> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Mike S
> Sent: Saturday, May 10, 2008 9:19 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 5370B
> 
> 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. 
> 
> 

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