Maybe some light would be shed if those who think the K2 is NOT a SDR would detail why.
73, Mike NF4L On Dec 23, 2012, at 5:55 PM, Rick Tavan N6XI <[email protected]> wrote: > I dunno, folks, we may be gilding lilies trying to define SDR. If software > handles modulation and demodulation, that's SDR to me. The K3 and KX3 both > fit fine. > > /Rick > > On Sun, Dec 23, 2012 at 10:34 AM, John Lawrence <[email protected]> wrote: > >> >> >> >> Don >> >> As I'd expect, you did a beautiful job summarizing the difference between >> the K3 and KX3 >> design architecture. >> >> I'd call the K3 a hybrid SDR and the KX3 a true SDR? >> >> What's interesting to me comes from looking at the leap forward in >> component technology to make >> direct SDR from RF possible. This is the evolution in the chip level >> devices it takes to gain this single step conversion >> to baseband. Faster and more agile DSP, A/D and D/A etc ICs are at the >> heart of the step forward >> between the K3 and KX3. >> >> The companies producing these chips were at my fingertips back in the days >> 10 to 20 years ago. Then they were only able >> to make it to lower frequency IF stages with costly designs only found in >> the top high tech applications such as those found in government >> surveillance. >> >> Back then Burr Brown, Analog Devices, Texas Instruments, Motorola, >> Lucent/Bell Labs were working hard with competitive designs. Semiconductor >> foundry geometries were heading for half micron on 4" or 6" silicon back >> then. >> >> The software development tools allowing greater coding efficiencies is >> another area that has played a major roll to bring us to this point. >> >> And, his was all done within our free enterprise environment by >> private/public capitalized US businesses. >> >> >> >> Happy Holidays >> >> >> >> >> >> John, W1QS >> >> >> Waldoboro, Maine >> >> >> >> >> >> >> >> >> ______________________________________________________________ >> 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 >> > > > > -- > Rick Tavan N6XI > Truckee, CA > ______________________________________________________________ > 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
