); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY From: xaos <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Fury Interface Board: 5MHz needed? Date: Sun, 04 Nov 2007 10:24:59 -0500 Message-ID: <[EMAIL PROTECTED]>
> ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Hello everyone, > > Shall we consider 5MHz OCXO's? > > I have a BUNCH of those. Most are really low end devices but I also have > a few gems. > I mean, some people might have a really nice 5MHz OCXO. Why exclude > them, if we don't have to? > > Anyone out there with interest in this? > > If nobody, except me, wants this I'll just drop it. > > Bruce suggested that a NIST JFET frequency doubler might do the trick. It is a very good and simpel solution. > What does the math say? > > If the frequency is multiplied by two, what else is multiplied? > Frequency error? I would think so. The normalized frequency error does not change, just the relative error. Remember, you divide with the nominal frequency. > What about phase noise? Doubles from the source and some addition. However, you normally have a very stable and good oscillator at 5 MHz. It is slightly less optimal, but using a good doubler like the NIST JFET one makes it reasnoble. I think it should be manageable. Im with Bruce on this one. 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.
