[TenTec] DSP Circuits

[John Rippey]

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?