Mr. Jednacz:
Can you explain why, since DSP is so flexible, ICOM seems to have trouble
getting the keying right for CW? The latest 756 PRO II shows up in the
Februrary QST report with poor, and apparently uncorrectible, waveforms on
semi-break-in and full break-in. Also, the close-in measurements of
two-tone third order IMD Dynamic Range and Blocking Dynamic Range specs for
the PRO II turn out to be inferior to at least four other production models
from other manufacturers (not to mention the IC-781). Finally, Icom seems
to have juiced upward the third order intercept point of the PRO II at the
expense of IMDDR3 and BDR figures to the point where they have fallen below
even the previous 756 PRO. From my perspective, it looks like the PRO II is
at best a partially-successful mish-mash of transceiver design compromises,
and certainly not the last word. And, these results help explain why
Ten-Tec is sticking with analog circuitry with its new transceiver's front end.
Any comments?
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