[Elecraft] K3 NR

[Brett Howard]

Ah ok then. I do know that with 3.25 and the shift ctrl set to .1 you
get some really nice LF response.

On 8/26/09, Bill W4ZV <btippett at alum.mit.edu> wrote:
>
>
>
> Brett Howard wrote:
>>
>> As far as the shift you're mentioning are you talking about the fact
>> that the FC star moves to the freq that you have pitch configured for?
>>  The filter is still centered in the IF land but it looks like a shift
>> because the K3 tells you about its filters in AF terms.
>>
>
> No.  At low pitches, the MCU shifts the IF filter such that the lower side
> is never lower than ~200 Hz.  If you're using a 500 Hz XFIL and PITCH 300,
> the XFIL passband is actually 200-700 Hz...not 300 +/-250 (i.e. not 50-550
> which would be centered).  Even though you see FC*.30 for the DSP filter,
> the IF filter is actually offset.
>
> 73,  Bill
>
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