[TenTec] TXCO unit [OT]

[Martin Ewing]

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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