From: "Didier Juges" <[EMAIL PROTECTED]> Subject: Re: [time-nuts] HP 5370B Date: Fri, 9 May 2008 20:11:42 -0500 Message-ID: <[EMAIL PROTECTED]>
> Mark, > > The 5335 is specified at 9 digits/second of resolution, the 5370 is > specified at 12 digits/second. That is severly overoptimistic on the 5370's part and just about overoptimistic on the 5335's part. I think you should not use those sales-numbers, as they are there to give you a one-figure-of-merit hint, but they are not qualitative values. > That's 3 orders of magnitude better resolution. That brings up noise that at > 9d/s is simply negligible. I'd suspect something like 40 times better, not 1000 times better. The 5335 singel-shot resolution is 500 ps while the 5370 has 25 ps, a factor of 20. The front-ends is not that good on the 5335 thought, so let's add some noise there. I could make some tests if you like... > My two 5370s are rock stable if I only look at the 9 left-most digits. Maybe you should trim your multiplier chain? > While it would be nice to have the same stability at 12d/s on the 5370 as we > get on the 5335 at 9d/s, that simply does not happen. I don't see how you could expect that. 10 digits stable should be possible, but again it is just a very very rought estimate of performance. Cheers, Magnus _______________________________________________ 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.
