You actually have 22 kHz of in-phase signal and 22 kHz of quadrature signal on the stereo output. You can combine those to get 44 kHz of bandwidth.
More info here: https://en.wikipedia.org/wiki/In-phase_and_quadrature_components wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Feb 4, 2020, at 2:45 PM, [email protected] wrote: > > Hello, > for a long time I just haven't looked into the details, but now I did > and I'am confused. > When I plug it into a soundcard it appears to show the current station > in the center of the display, to my understanding the center of the > display is the half of the sampling frequency of the sound card. > This ist at least confirmed in the manual pg. 26 (Rev C5). > > When I sample the I/Q signal by myself, the same signal appears at the > lower end of my spectrum. > Now it looks like I'm not getting the full bandwidth sampled? With fs of > 44.1kHz I can only see 22kHz of bandwidth after FFT. > > So, according to many articles I read about FFT, the resulting bandwidth > is always fs/2. So how can we see 44kHz of spectrum on a 44kHz sound > card? I'm confused... > > 73 Gernot DF5RF > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
