Someone asked about using the XG3 to measure the skirt attenuation of a crystal filter.
If the phase noise is -105 dBc / Hz, then with a 500 Hz crystal filter the filter skirts will disappear into the noise at about -105 + 10 * log(500) = -78 dB. With a 2.7 kHz filter, it works out to -71 dB. Alan N1AL On Wed, 2011-04-13 at 18:51 -0700, Wayne Burdick wrote: > Hi John, > > Phase noise is specified in the manual. It is a relatively constant > -105 dBc/Hz, even at very close spacings, which is excellent > performance for a low-cost, wide-range signal source. > > I wouldn't amplify it to 1KW. > > Let me know how it works for you as a replacement for the HP8640. Not > as many knobs and switches, but it runs from a 9-V battery. > > 73, > Wayne > N6KR > > > On Apr 13, 2011, at 6:46 PM, juergen wrote: > > > Hi > > > > No phase noise performance data in the manual. What is the phase > > noise performance of the XG3 like? > > > > My HP8640 is being held together by a miracles and prayers, I need a > > replacement. > > > > 73 > > John > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
