[time-nuts] Comparing 10 MHz Oscillators at 10 GHz

Ulrich Bangert df6jb at ulrich-bangert.de
Wed Jan 5 03:17:33 EST 2011


Rick, 

I guess what you are saying applies only to the case where one tries to mix
down to DC ??

73s de Ulrich, DF6JB

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Rick Karlquist
> Gesendet: Mittwoch, 5. Januar 2011 01:24
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] Comparing 10 MHz Oscillators at 10 GHz
> 
> 
> Brucekareen at aol.com wrote:
> > Luciano Paramithiotti's January 1 post about his 10-to-100 MHz 
> > multiplier project reminded me of past musings about using 
> two 10GHz, 
> > phase-locked oscillators to compare the 10MHz outputs of my 
> T-bolt and 
> > LPRO so I  could quickly adjust the latter by observing the 
> mixed 10 
> > GHz signals with  a microammeter.  I am talking about the 
> California 
> > Microwave, Frequency
> 
> It has been my experience that most sources have too much 
> jitter to multiply from 10 MHz to 10 GHz and expect to 
> compare with a phase detector, even if the two 10 MHz sources 
> are phase locked to each other, let alone independent.
> 
> Rick Karlquist N6RK
> 
> 
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