[time-nuts] Disciplining Rubidium
jmiles at pop.net
Thu Apr 24 14:23:54 EDT 2008
Right; I'm referring to noise past 1 kHz or so. The best VHF oscillators
are much quieter than comparable 5/10 MHz oscillators. At least, I've never
seen a 5 or 10 MHz unit that's rated below -175 dBc/Hz at 20-100 kHz.
-- john, KE5FX
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of John Ackermann N8UR
> Sent: Thursday, April 24, 2008 5:21 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Disciplining Rubidium
> John Miles wrote:
> > Phase noise generally gets better with the higher-frequency
> OCXOs, though.
> > I think the best of all possible worlds would be a 5-MHz OCXO
> like the one
> > you describe, being used to discipline a 10 MHz or
> higher-frequency part.
> > -- john, KE5FX
> I'm not sure about that -- at least, the Wenzel ULNs show better noise
> at small offsets for the 5 MHz than the 10 MHz versions (though the
> floor is the same).
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