The appearance is that the filter being used for RX does not have its offset set for the center of actual measured filter band pass edges.
73, Guy K2AV On Sunday, March 22, 2015, GRANT YOUNGMAN <[email protected]> wrote: > One of the things I’ve observed in sync AM receive, is the difference in > AF response between LSB and USB (selected by the shift control). > > The LSB side has significantly better bass response than the USB side. > Likewise, USB has more highs and very little low end. It’s much like the > response that occurs when the LSB/USB oscillator carrier frequencies are > offset from their correct position relative to filter edges. Virtually > anyone who has ever owned a KWM-2 or 75S-3x would understand what I’m > talking about. The difference is apparent whether the sync detector is > locked on a carrier or not. > > Wonder if anyone can comment on this (Eric?). It occurs with either the > 13KHZ or 6KHz filters. > > Grant NQ5T > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] <javascript:;> > > 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] <javascript:;> ______________________________________________________________ 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]
