[Elecraft] K3 DSP shape factor?

[Ken Wagner K3IU]

G'morning David:

Check the firmware release notes for v1.58.

73,
Ken K3IU
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David Woolley (E.L) wrote:
> Lyle Johnson wrote:
>> <div class="moz-text-flowed" style="font-family: -moz-fixed">> The 
>> question I have is "What is the effective shape factor of the K3
>>> DSP?"
>>
>> DSP filters usually are so-called Finite Impulse Response (FIR).  FIR 
>
> I seem to remember that, originally, all the K3 IF filters were IIR 
> (infinite impulse response) filters.  Subsequently FIR filters were 
> provided, as a user choice, for one end of the bandwidth range.
>
> IIR filters give a better shape factor for a given amount of 
> processing power, but are prone to ringing (that's basically want the 
> infinite response means) and don't have constant group delays (whereas 
> symmetric FIR ones do).
>