HI all... I really wonder why there is so much discussion about the filter step size, which is currently 50hz. Maybe I am just nuts, but doesn't that 50 hz "come off" of each side of the BW?
Here is what I imagine... I am on frequency A with a DSP filter BW of (say) 500 (lets ignore the roofing filter for now) and I hear a little QRM a bit above me. When I crank the DSP down to 450, isn't that moving the "leading edge" only 25 hz (and also the trailing edge). So in reality, am I not "changing" things in 25hz steps in terms of the offending QRM? Is there really a situation where you would need to narrow it 12hz instead of 25hz (and appreciate the difference)? Maybe those requesting a smaller step need it for PSK? But even then, it doesn't make a whole lot of sense to me. How often would adjusting the DSP bandwidth something less than 25hz (since that is what we have now), be better than just going to "full" 25hz? Or viewed from the other direction, if you want to narrow it even more, narrow it "one more step" and get really narrow. If I understand this correctly, great. But if I don't, please fill me in because I would genuinely like to find out more. Thanks!! de Doug KR2Q _______________________________________________ Elecraft mailing list Post to: [email protected] 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
