Hi Indeed the phase noise goes up by 20 log N when multiplying. To be precise, only the phase spurs go up by 20 log N. If they are incoherent they still multiply, but you get a bit of an offset.
Bob On Feb 9, 2012, at 2:03 AM, Javier Herrero wrote: > El 09/02/2012 01:40, Bob Camp escribió: >> Hi >> >> Here is a little more on how much of a problem you have. >> >> If you would like the spurs to be down 70 dbc at 10 GHz. They go up by 20 >> log N. in this case N is 1000. That gets you 60 db. Spurs at 10 MHz would >> have to be down at -130 dbc to make it at 10 GHz. >> > As a side note (since I've just asked by), does the phase noise also go up by > 20 log N when multiplying? > > 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.
