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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