Duane,
> I think bottom line tradeoff became tighter filter
> skirts vs. good QSK performance. I'm convinced that
> better filter skirts could be possible with the
> Pegasus/Jupiter DSP hardware - if you are willing to
> live with a longer TX/RX turnaround time. For high
> speed CW ops that is not likely an acceptable
> tradeoff. I'm pretty sure that the ADSP2181 DSP of
> the RX340 is the same as the Peg/Jup, but it doesn't
> attempt to switch between RX and TX though.
That makes sense. Any DSP that takes place introduces a delay in the signal,
if for no other reason than the number of samples required for the filter,
but there is also the processing time. With a tighter filter, more samples
are required, hence a longer delay.
That being said, it sure would be nice, since I'm not a high speed CW op,
and not interested in fast QSK if we could slow down ( or eliminate ) the
QSK in trade off for tighter filters.
73,
Mark
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