On Fri, Sep 14, 2007 at 02:42:02PM -0700, David Fleming wrote: > --- Tree <[EMAIL PROTECTED]> wrote: > > > You might wonder about the display on the left > > showing my passband (it's got wings on it). Just yet > > another feature that hasn't been talked about yet > > that will blow the socks off the competition. > > So let's talk about this feature. It looks like > shingles on a roof. What's it all about?
It might be covered in the new manual - but this is a special filter that I have found very well suited to hearing weak signals in noise. One name I have heard it called is "context" filtering. On CW, it essentially is two filters running at the same time. The DSP filter is tuned to something like 150 hertz bandwidth - but the skirts stop down 10-20 db down - and the response flattens out - until you get out to something closer to 400 hz and then the response dives down. So - you can hear signals outside of your narrow passband - but they are attenuated with respect to anything in the center of your passband. That - with some of the audio special effects (using stereo) - really make this receiver a joy to use on a noisy band like 160 meters. Tree N6TR [EMAIL PROTECTED] _______________________________________________ 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
