> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Didier Juges > Sent: Saturday, May 10, 2008 8:08 AM > To: Time-Nuts > Subject: Re: [time-nuts] HP 5370B > > > That's a good illustration of the difference between > precision and accuracy. >
This is not unique to the 5370 counter. Many instruments have precision that far exceeds their accuracy. Most microwave network analyzers have amplitude resolution of 0.01dB, while their accuracy is just around 1dB in most cases. There are a few cases where it can actually be useful, but in the vast majority of cases, it simply confuses the hell out of the unsuspecting QA person. 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. Didier No virus found in this outgoing message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.23.11/1422 - Release Date: 5/8/2008 5:24 PM _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
