Re: TCXO Clipped Sine Wave

Hi Tom,
Thanks for the councils. An alternative could be an oscillator (480 Mhz)
with 1/4 coax resonator and IC
PLL TSA5511 I2C Bus clocked by 40Mhz/10 (4mhz)...
I must think to us...

Ciao IK6GQC Rocco

"K7ITM" <k7itm@xxxxxxx> ha scritto nel messaggio
news:1121749815.727527.170530@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> It all sounds possible to me. It is not very different from some of
> the schemes we use commercially to generate internal frequencies (in
> spectral analysis equipment). Your idea of good filtering at 480MHz
> (and also, I hope, at 120MHz) is a good one, to keep out other
> combinations of multiplication. The one other thing I would be careful
> about is the phase noise of the oscillator. The AD9954 should be
> capable of very good phase noise performance, but you MUST feed it a
> clean reference to keep the output clean. I have recently tested some
> TCXOs which are very stable and accurate, but whose phase noise is not
> as good as I would really like. It is important to feed the oscillator
> from a very clean supply, but that alone is not a guarantee of good
> phase noise. See http://www.techlib.com/electronics/finesse.html for a
> nice idea to make a very clean supply for circuits that draw
> essentially constant current.
>
> Cheers,
> Tom
>


.

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