Tom, I do agree that a specially tuned analog system will provide better results for the specific task that it is tuned for than a digital system any day. The advantage of digital is that it can be made "almost as good" while being more flexible through the use of computing power. Your desires tend toward weak signal CW operation on the low bands - we all know that. But an analog system tuned to those needs would not be ideal for ease of operation in say a ragchewing SSB situation - for one thing the filters are too narrow :-) . The major advantage offered by DSP is the ability to change the filtering with the turn of a knob, and process the modulation and demodulation tasks with computational algorithms rather than changing the hardware - tailoring the algorithms to each task. Is it as good as analog tuned for a specific task? NO - but it is usually better than a general purpose analog system that attempts to be "everything to everybody". The equivalent flexibility with the same degree of "best-ness" would be cost prohibitive if attempted in analog.
73, Don W3FPR Tom W8JI wrote: > I'll probably get lynched for saying this, but for my ears I've never found > a DSP system that is as good as a pure analog system when there is rough > noise. The K3 is much better than my Orion I, but I strongly prefer full > analog IF's with rough noise or when a signal is right at noise floor and > the floor is a little rougher than white noise. > > >> Recently, a thread took place on eHam (I know, I know...) about an op's >> issue with another DSP based rig and high levels of QRN. A comment in >> the thread from another op leaves the impression that his K3 also has >> the same response to high levels of QRN, a sort of reverb as he >> described it. >> > > To me it sounds more like a little intermodulation or mixing of the noise > and signal. I've even considered building an analog IF system just to see > if I like it better. :-) > > 73 Tom > > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
