Excellent summary, Tom, but I do have to take exception to one statement:
"Only Kachina,
> Pegasus & Jupiter and the PRO series are capable of this. All other DSP is
> just simple filtering. Ten Tec pioneered this concept and is going to take
> it to the next level with the Orion."
Actually, the Kachina 505DSP was on the market quite some time before the
Pegasus, etc. If you are referring to military and/or commercial
development, probably Collins or Rhode & Schwarz or others were first to
develop almost fully DSP radios.
I do believe that the Yaesu MK V is using its DSP for more than filtering
but not sure.
But you are certainly correct in that the DSP "core" radios are the leading
architecture now and can only improve in the future as speeds increase and
costs decrease.
72/73/oo, George W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771
Icom IC-756PRO #02121 Kachina #91900556 IC-765 #02437
All outgoing email virus-checked by Norton Anti-Virus 2002
"Thomas C. Jednacz" wrote:
>
> Of the hundreds of postings I have seen, none mention the full significance
> of DSP. DSP is a LOT more than filters. CW, SSB, AM etc are all generated by
> software in the DSP chip. This is really significant for SSB because there
> is no filter used to strip off the opposite side band. Hence the band width
> is really 0 to 3 KC on transmit and receive with the other sideband down 50
> or 60 dB depending on whether the software is using 16 or 32 bit chips. You
> can't do that with a filter rig. ALC, NR, NB, Processing and much more are
> all done in software and done correctly. Basically, if you can write an
> equation for it you can do it in software on the DSP chip. Only Kachina,
> Pegasus & Jupiter and the PRO series are capable of this. All other DSP is
> just simple filtering. Ten Tec pioneered this concept and is going to take
> it to the next level with the Orion. Hope this helps others to understand
> why I am so wild about what FULL DSP can do. Just amazing!
>
> Oh, by the way, the author of the QST article on the PRO II missed the whole
> concept of how ICOM used the DSP chip. He thought it was only filtering!
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