[Elecraft] Wrong Filter Question - 8 pole vs. 5 Pole Filters

[Bill W4ZV]

Toby Deinhardt wrote:
> 
>> DSP filter responses can be calculated exactly, they don't actually
>> have to be measured.
> 
> As long as we don't have exact and detailed information about the  
> implementation of the filters in the K3, the responses curves cannot  
> be calculated by third parties.
> 

Correct.  Even within the K3 there are two choices for calculation of the
DSP filters...Finite Impulse Response (FIR) or Infinite Impulse Response
(IIR).  These can be toggled by pressing "7" when you are in any CONFIG
filter menu.  I forget the exact range of applicable bandwidths but believe
both are available at the narrowest WIDTH settings (~150 Hz and below).

73,  Bill

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