Im not a big SSB operator, but I really dislike hearing a mis-tuned SSB
signal. However, in recent years that's become a non-issue for me with rigs
like the K3. It's very rare QSO's aren't on an even KHz frequency -
frequently in 5 kHz increments.
The stability and accuracy of rigs like the K3 make mis-tuning rare if you
set your dial for the closest even kHz, provided your K3 is calibrated.
After decades of protecting our right to choose any frequency in our
"bands", phone operators seem to be self-channelizing. One time I called CQ
on a clear frequency +/- at least 5 kHz using SSB and a guy came back to say
I was "off frequency". ??? I called CQ. What frequency am I off of? He
explained that my frequency was something like 7.274 instead of being "on"
7.275 and suggested I move up 1 kHz to get "on frequency".
Can't remember what I did. I was laughing too hard.
Ron AC7AC
-----Original Message-----
As a hearing-challenged K3 operator, this is something I would love to see
(hear!).
73,
Hank, W6SX
2011/4/29 Eduardo González <edujo...@gmail.com>
> It is feasible to implement SSB auto-clarifier (Spot function on SSB)
> on firmware of K3?
>
> I'm a researcher in Digital Signal Processing and based on the work of
> Robert Dick ("Tune SSB Automatically", Robert Dick, QEX, January 1999,
> pp 9-18), i wrote code to do auto-clarification in real time and tried
> other methods (see references below). I'm more theoretical than
> practical, so i don't have suficient expertise running DSP code on
> embeded systems. The code developed by me only run on PC system and
> perspective is great, auto clarification is running !
>
> Is there patent limits?
>
> DSP hardware of K3 is capable of do more than two FFT in cascading,
> Cepstrum, Smoothing.
> It would very nice just to press SPOT button, and get voice tuned, as
> do CW and AM-S. It will have limitations, but i think it would be
> nice.
>
> References:
> Please, check my paper "Methods of Carrier Frequency Recovery in
> SSB-SC Modulation to be applied in Portable Communication Equipments"
> http://redalyc.uaemex.mx/redalyc/pdf/707/70712302.pdf
> it explain set of methods that i have tested and last page have
> important references.
>
> Excuse my poor english.
>
> Eduardo González (YY4GMJ)
>
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