Very interesting, Gary, and thanks!
I have made detailed spectral comparisons between the IF DSP filters in the
ICom 756 PRO, the Kachina 505DSP of similar architecture and the Icom 765
with conventional crystal filters. There is no comparison whatever between
the shape factors and overall shapes of the PRO filters compared to any of
the others. The PRO filters are mathemeticallu nigh perfect in shape and
performance. I think that you have found that the Pegasus IF DSP filters
are not the equal to the conventional INRAD filters - that is very
surprising to me.
Thanks again.
73/72, George
Amateur Radio W5YR - the Yellow Rose of Texas
In the 57th year and it just keeps getting better!
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
K2 #489 Icom IC-765 #2349 Icom IC-756 PRO #2121
Gary Hoffman wrote:
>
> George,
>
> I have cascaded 10 pole Inrad filters in the Corsair. The skirts are
> deeper and sharper, which is the thing that helps the most.
>
> The low frequency, "IF" DSP filters in the Pegasus work well, but they
> don't work nearly as well as the Corsair. You could really see the
> difference in the contest.
>
> 73 de Gary, AA2IZ
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