On Tue, 02 Jun 2020 05:52:13 +0000 "Poul-Henning Kamp" <p...@phk.freebsd.dk> wrote:
> I have played with this one: > > http://www.rudius.net/oz2m/ngnb/dds.htm > > as a synthesizer replacement in the HP5065, but your "dual" configuration > and the integrated 1GHz "pre-oscillator" would fit that purpose better, > so sign me up as interested buyer. As a synthesizer for a Rb vapor cell standard, I would recommend going the same way as INRIM did in [1]. It is by far the lowest noise synthesizer I have seen for the relevant offset frequency range. Yes, it is a quite high effort system. But it's also worth it. With this, you are sure that the short term noise limit will not be the synthesiser anymore, but the lamp noise. In a discussion, Claudio Calosso told me that the difficult part of the whole system is getting to 1.6GHz. That part determines most of the perfomrance. The rest was "quiet easy". Attila Kinali [1] "Simple-design ultra-low phase noise microwave frequency synthesizers for high-performing Cs and Rb vapor-cell atomic clocks", by François, Calosso, Abdel Hafiz, Micalizio, Boudot. -- Science is made up of so many things that appear obvious after they are explained. -- Pardot Kynes _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
