[time-nuts] Good clean-up oscillators

[Magnus Danielson]

Hi Luciano,

Thanks for that overview, I was kind of looking for something like that
and hoping that someone had some form of overview.

It looks like this is a spec-sheet based investigation. Wonder if we
could collect up a measurement based one.

Cheers,
Magnus

On 1/24/19 8:28 AM, timeok at timeok.it wrote:
> 
>    Magnus,
>    here the list of the most interesting OCXO  with the phase noise as declared by the companies.
>    Luciano
>    http://www.timeok.it/wp-content/uploads/2015/08/ocxo-comparative-table1.pdf
> 
> 
>    Da "time-nuts" time-nuts-bounces at lists.febo.com
>    A "Discussion of precise time and frequency measurement" time-nuts at lists.febo.com
>    Cc
>    Data Wed, 23 Jan 2019 21:43:34 +0100
>    Oggetto [time-nuts] Good clean-up oscillators
>    Fellow time-nuts,
> 
>    While we often look at long-term stability, ADEV etc. we consider
>    oscillators in their free-running properties. This is all fine and dany,
>    but when we want to use an oscillator as a clean-up oscillator, the
>    servo-loop with surpress much of the low-frequency/high-tau properties
>    and replace that with that of the reference.
> 
>    Consider for instance that we have a LPRO rubidium and we want to use a
>    clean-up oscillator to provide better phase-noise, what would be a good
>    selection?
> 
>    While there is plenty of choices, it is a bit different from that which
>    is relevant when considering it as a free-running oscillator. The white
>    noise which dominated far-out would dominate, and only some of the
>    flicker phase becomes relevant.
> 
>    I could easily get a OCXO of good quality, but really, what would be
>    interesting choices? Have someone measured this enough to get a kind of
>    rough idea at least?
> 
>    Cheers,
>    Magnus
> 
> 
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