Hello Javier, I have a couple from that last Ebay lot , and the phase noise/spurs are so bad on these that I figured the 10MHz must have been generated by a DDS. I posted the phase noise and ADEV plots of this unit to this list earlier this year.
bye, Said Sent From iPhone On Jun 3, 2012, at 2:19, Javier Herrero <[email protected]> wrote: > Hello, > > El 03/06/2012 10:46, [email protected] escribió: >> >> The FEI-5680A Rubidium that we discussed here some time ago has a much >> worse phase noise plot of course, because the 10MHz is generated digitally >> through a DDS, not a 10MHz crystal oscillator.. >> > There is a version that generates 10MHz directly through DDS, but the > particular version we recently discussed a lot about generates the 10MHz > signal from a 60MHz oscillator, and the DDS is used for generating the > ~5.3125MHz signal for mixing with the 114th harmonic of the 60MHz to obtain > the Rb resonance frequency. > > I don't remember if someone did a comparison in PN performance between the > two FE-5680A flavours. > > Regards, > > Javier > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
