FYI, some phase noise measurements on local oscillators at 106 and 117 MHz (used for microwave transverters) can be found at http://f5lgj.chez- alice.fr/mesure_oscillateur.html . The PLLVCXO mentioned there, that allows locking to a 10 MHz reference, should be this one http://f4dru.chez-alice.fr/plvcxo/CJ2010. pdf .
73 de Claudio, IN3OTD / DK1CG >----Messaggio originale---- >Da: "Dr. David Kirkby (Kirkby Microwave Ltd)" <drkir...@kirkbymicrowave.co.uk> >Data: 30-mag-2016 11.06 AM >A: "Discussion of precise time and frequency measurement"<time- n...@febo.com> >Ogg: [time-nuts] How can I generate a very clean 1 W signal @ 116 MHz ? > >I was thinking about designing a 2 m (144-146 MHz) ->HF (28-30 MHz) >transverter, using a 116 MHz local oscillator feeding a level 30 mixer. > >116 + 28 = 144 >116 + 30 = 146 > >I'm wondering what's the best way to generate 116 MHz with very low phase >noise. Phase noise at < 20 kHz offset is particularly important, but 200 >kHz would be fairly important. Outside that, it does not matter too much. > >The ability to lock to 10 MHz would be "nice", but certainly not essential, >as absolute frequency stability would not be of prime importance. Getting >the phase noise as low as possible would be more important. I expect better >performance can be achieved if one forgets about locking the signal source >to something else, but I may be wrong. > >An HP 8663A sig gen has <-147 dBc/Hz at 10 kHz offset, but I'd hope its >possible to produce something better than is possible in a commercial sig >gen that covers up to 2.5 GHz. > >Dave >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to https://www.febo.com/cgi- bin/mailman/listinfo/time-nuts >and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.