The K2 is definitely not an SDR. The K2 uses traditional rf amps, mixers, if amps, crystal filters in the if, and a product detector, followed by an audio amp. Elecraft does offer an add on audio DSP option which works quite well.
JIm, W4ATK On Dec 24, 2012, at 7:39 AM, Mike Reublin <[email protected]> wrote: > 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 ______________________________________________________________ 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
