[time-nuts] Is oscillator sync always bad?

[Predrag Dukic]

Bruce,

I know the math,  and possible perils. The main question is still:

Does statistics help?  Is it going to be better?

If I do try,  I'll use a bunch of 13 MHZ TCXO's, because I have only 
3 10811, and more than 30 TCXOs.

Also with a higher number of lower quality oscs improvement  could be 
easier to see...

Predrag



At 21:31 18.12.2008, you wrote:
>Predrag Dukic wrote:
> > Hi, Time -Nuts,
> >
> > Did anyone try to deliberately allow  syncronisation  of two
> > oscillators, by , for example paralleling  outputs of two 10811.
> >
> > I expect to see some benefits from the usual statistics:   Phase
> > noise divided by sqrt of 2    and also decreased  amplitude   random
> > frequency jumps.
> >
> > Aging could also be average of the two.....
> >
> > Predrag Dukic
> >
> >
> >
>Pedrag
>
>First ensure that doing this doesnt overstress the output amplifier cascade.
>Then the two oscillators will need to be tuned so that they are very
>close in frequency before injection locking can occur.
>The higher the reverse isolation of the output amplifier and the higher
>the crystal Q the closer the 2 oscillator frequencies will have to be.
>The maximum frequency difference tolerable for injection locking to
>occur can be estimated from Adlers equation.
>
>Bruce
>
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