I wonder how Wenzel looks at drive level, they seem to have their products dialed in.
Thomas Knox > From: [email protected] > To: [email protected] > Date: Sun, 26 Feb 2012 12:48:26 -0800 > Subject: Re: [time-nuts] Morion MV89A Repair > > > > > -----Original Message----- > > From: [email protected] [mailto:time-nuts- > > [email protected]] On Behalf Of Tom Knox > > Sent: Sunday, February 26, 2012 9:41 AM > > To: [email protected] > > Subject: Re: [time-nuts] Morion MV89A Repair > > > > > > Is this the paper you are speaking of? > > Google: Optimization of Drive-Level in High Stability Low-Noise OCXOs > > > > Thomas Knox > > That's not the one Bob (and I) was talking about, but there are some > interesting contradictions between the paper you mentioned: > > > http://www.magicxtal.com/articles/Optimization%20of%20Drive-Level%20in%20Hig > h%20Stability%20Low-Noise%20OCXOs.PDF > > and Rakon's article: > > http://www.rakon.com/Products/Public%20Documents/Whitepapers/PHASE%20NOISE%2 > 0IN%20CRYSTAL%20OSCILLATORS.pdf > > The Rakon author states that the flicker and white PM regions, including the > broadband floor, are influenced by factors other than the crystal (Figure > 9). > > Meanwhile, the Russian authors of the first paper state repeatedly that the > broadband noise floor is a function of the crystal current, and that > close-in noise isn't affected by crystal current. > > It's obvious enough that high levels of crystal current are bad for > long-term stability and aging, but it's not as easy to see why high crystal > current in itself should rule out a good broadband noise floor. There are a > lot of assertions in the literature, especially in the magicxtal.com paper, > that are backed up by measurements but not by solid analysis. > > -- john > > > _______________________________________________ > 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. _______________________________________________ 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.
