"If the center frequency was set to 1.225 KHz (or close) as you suggest, then the 2.7 KHz filter would let though too much opposite-sideband energy. We want some stopping power down close to zero Hertz, so the filter edge is kept 250 Hz above zero."
I don't understand a need to lock the lower filter edge above 250hz for opposite sideband rejection. The dsp filtering slope is very steep. You can set the Orion lower filter edge to 50hz and it sounds great. 73, Barry N1EU _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
