[time-nuts] using Fury GPSDO with Rb

Bruce Griffiths bruce.griffiths at xtra.co.nz
Mon Apr 21 00:45:44 EDT 2008

SAIDJACK at aol.com wrote:
> Hello Ulrich,
> This is so true. See Tom's phase noise tests of a  Russian Rubidium prototype 
> disciplined by a Fury GPSDO. Lot's of times  there is not much space to put a 
> good OCXO inside the Rb's case.
> BTW: using the Fury's 1PPS input, that unit can be used as a cleanup  loop 
> for dirty Rb's that have 1PPS outputs.
> _http://www.leapsecond.com/pages/fury/phase.htm_ 
> (http://www.leapsecond.com/pages/fury/phase.htm) 
> I just fired up my FTS1200-100 tonight for testing, it's dead on 5MHz. Does  
> anyone have a good circuit idea to go from 5MHz to 10MHz? I was thinking of  
> something similar to the HP5370B input circuit - basically a tuned amplifier  
> locking onto the 10MHz overtone.
> bye,
> Said

If you want better performance than the 5370 frequency multiplier chain 
you should use a low phase noise frequency multiplier such as one of 
those listed or depicted at:


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