[Elecraft] K3 & ADAT ADT-200A by HB9CBU

[Philip Covington]

AB2TC wrote:
>Hi,
>
>I, too, would be very interested in seeing how "entire HF spectrum digitized
>at once" receivers would fare in the real world. I am *very* skeptical.
>Although the Perseus (with that architecture) receiver fares relatively well
>in the recent ARRL test, the testing completely ignores what happens when
>there are not *two* but thousands of strong signals in the passband. With
>this new architecture, it's imperative that ARRL and other labs find other
>ways of evaluating real world performance as a simple two-tone test becomes
>completely irrelevant.


Toby Deinhardt wrote:
>
> Hi,
>
> has anybody done a serious test of the ADT-200A transceiver yet?
>
> <http://www.adat.ch/index_e.html>
> <http://www.adat.ch/pub/Presentation_Hamfest_22-09-07.pdf>
> <http://www.adat.ch/pub/ADT-200A_Messresultate_V10.pdf>
>
> It would be rather interesting to see how the concept used by the K3 (24
> bit digitalization after IF) compares in the real world to the early 14
> bit digitalization as used by the ADT-200A (and afaik by the Perseus RX
> from Microtelecom), especially with the chips available currently.
> <snip>
>
>

The Perseus actually out performs the K3 receiver regardless of what
the recent ARRL test reports.  I agree that the ARRL needs to come up
with valid tests to evaluate real world performance of digital
receivers such as the Perseus, ADT-200A, and QS1R.

-- 
Phil Covington
Software Radio Laboratory LLC
Columbus, Ohio
http://www.srl-llc.com