[TenTec] TXCO unit [OT]

[David McClafferty]

But why would you want to do it? Changing to a PLL
will increase the phase noise.

Dave, VE1ADH
 
 --- Martin Ewing <martin at aa6e.net> wrote: 
> John,
> 
> In a way, it's simple.  That's what a frequency
> synthesizer does.  You take a 10 MHz reference,
> divide
> it down and/or multiply it up by various ratios, mix
> and filter, etc.  Doing it well and cheaply is
> another
> matter.
> 
> A simple way: divide your 10 MHz to get 1 MHz and 10
> kHz.  Lock your 9 MHz osc. to the 9th harmonic of 1
> MHz. Mix your 9.03 osc with 9 MHz and lock to the
> 3rd
> harmonic of 10 kHz.  There are lots of other
> combinations that would work, too.
> 
> 73, Martin, AA6E
> 
> --- John Clifford <johnclif at ix.netcom.com> wrote:
> 
> > Someone with more electronics knowledge than I
> (just
> > about anyone), please
> > explain the following:
> > 
> > * How would one design a xtal-based oscillator
> that
> > uses a PLL to slave
> > itself to a master oscillator when the slave xtal
> > frequency is not a
> > multiple/divisor of the master reference
> frequency?
> > 
> > I'm thinking specifically of how to get a 10 Mhz
> > TXCO to provide a reference
> > for a 9 Mhz and 9.030 Mhz xtal so that they can be
> > absolutely locked in via
> > a PLL.
> > 
> > Thanks for any explanations.
> > 
> >  - jgc
> > 
> > John Clifford KD7KGX
> > 
> > Elecraft K2 #1678
> > /KSB2/KIO2/KBT2/KAT2/KNB2/KAF2/KPA100
> > Ten-Tec Omni VI/Opt1, Centaur, 238B
> > Alinco DR-605TQ, DJ-V5
> > Icom T90A
> > 
> > IRLP #3978
> > 
> > email: kd7kgx at arrl.net
> > 
> > _______________________________________________
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> > TenTec at contesting.com
> >
> http://lists.contesting.com/mailman/listinfo/tentec
> > 
> 
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