Somewhat related to the discussion about GPSDO's I have a basic question:

It used to be that 5MHz was the "hot spot" for crystals on the parameters we 
care about as time-nuts.

Have advances in X-tal science changed that ?

To make it a concrete question:

If tasked with designing a Cs/Rb beam/fountain/whatever today, would one still 
start the synthesizer-chain at 5 MHz or would a higher frequency give better 
results ?

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
[email protected]         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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