[time-nuts] Morion MV89A Repair

[Tom Knox]

I wonder how Wenzel looks at drive level, they seem to have their products dialed in.

Thomas Knox



> From: jmiles at pop.net
> To: time-nuts at febo.com
> Date: Sun, 26 Feb 2012 12:48:26 -0800
> Subject: Re: [time-nuts] Morion MV89A Repair
> 
> 
> 
> > -----Original Message-----
> > From: time-nuts-bounces at febo.com [mailto:time-nuts-
> > bounces at febo.com] On Behalf Of Tom Knox
> > Sent: Sunday, February 26, 2012 9:41 AM
> > To: time-nuts at febo.com
> > 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 -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.