Thanks for the explanation, Alan. So, my next question is, how does it compare with a crystal filter? It is better? Does it give you more flexibility with filtering?
Thanks, Gary, N7HTS On Tue, 26 Jul 2011 08:08:38 -0700 Alan Bloom <[email protected]> wrote: On Tue, 2011-07-26 at 08:44 -0600, Gary D Krause wrote: I've been wondering what Quadarature down-sampling is? This is the first that I have heard of it. It's like a two-channel direct-conversion receiver. The two channels are on the same frequency but use local oscillators that are 90 degrees out of phase. With suitable processing, the in-phase (I) and quadrature (Q) mixer outputs give both the amplitude and phase of the signal. Among other things, that makes it possible to suppress the unwanted sideband of an SSB signal without a crystal filter. Alan N1AL ______________________________________________________________ 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
