wayne burdick wrote:
>
>
> The CW and PSK31 decoders works best with a narrow bandwidth (50-150
> Hz). Once you have this dialed in, turn on CWT and dial the signal in
> close to the center of the passband. In the case of CW, hold TEXT DEC
> and use VFO A to adjust the "THR" (threshold) setting until the CWT bar
> flashes in time with the incoming code. I typically use threshold
> settings between 3 and 7. It takes a few seconds for the decoder to
> lock in, and of course it will be affected by band noise and fading.
> When tuning PSK31, use FINE steps (1 Hz) and tune very slowly, giving
> the decoder a chance to lock.
>
> For RTTY, use a bandwidth of around 170-250 Hz. With CWT turned on,
> adjust for mark/space balance on the bar graph.
>
> The K3 also does decode on transmit, so someone can look over your
> shoulder and get the gist of a CW or DATA QSO. I hope you ultimately
> find it useful, but if not, I'm open to suggestions.
>
>
I find the CW decoder works amazingly well, Wayne. I was surprised how well
it copied stuff in the CQ WW contest. Of course I did have the filtering
dialled down very narrow in the contest.
However I made a few test QSOs using the built-in PSK encoder/decoder but I
found it very hard to tune in, compared to using a waterfall with sound card
software. When I did tune in a station I found when I called them that I was
off frequency by quite a few Hz. I could hear the difference in pitch
between their signal and mine, having the TX monitor enabled. After my
transmission they usually returned on a different frequency, so that several
seconds of their reply was gibberish until I could tune them in again.
Although the ability to send and receive data without a sound card is a nice
feature, in practise I find the limitations to be too great for it to be
more than a "party piece". Perhaps others have been more successful.
As Christmas is almost here, may I end this posting by wishing everyone, but
especially the Elecraft team, a very merry holiday season.
-----
Julian, G4ILO. K2 #392 K3 #222.
http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham
Directory http://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3
--
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