>
>
>Tom Rauch wrote:
>
>
>> If it has DSP, at least at the current state used in our radios, it
>> better have a narrow crystal filter long before the signal hits the
>> DSP system.
>>
>>
>> 73, Tom W8JI
>
>This has smacked it on the head; DSP in the ham context has to be seen
>as cheap and nasty and a sales gimmick.
Amen.
>High Q crystal filters remain
>expensive, while multi-mode, multi-bandwidth DSP can be implemented for
>a few dollars at most once the software has been sorted out.
>
>One of the great advantages of DSP is the lack of ringing in narrow
>bandwidths because of near zero group delay, and reduced operator
>fatique resulting from the noise reduction.
>
The best sounding SSB does not come from narrower bandwidths. The TS-930
is one of the better sounding radios. BW is approx. 2.8KHz. The filters
do not ring.
cheers, Ian
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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