[Elecraft] K3 is an SDR?

[Rick Tavan N6XI]

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 <j123law at aol.com> 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
>
>
>
>
>
>
>
>
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-- 
Rick Tavan N6XI
Truckee, CA