K3: elaborate on the DSP at AF

[DOUGLAS ZWIEBEL]

Wayne, Eric, most likely Lyle:

I have noted TONS of references to "DSP" on the FAQ but all of them
appear to apply to the DSP at IF.

What does the DSP at AF do (capability)?
Is the LMS NR at IF or AF?

I do note this section from the FAQ which is otherwise undefined (IF vs AF):
"There are on the order of 100 specialized DSP commands, including
those for setting up arbitrary filter bandwidths and center
frequencies. "

Is this the AF DSP?

Thanks....
de Doug KR2Q
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[KK7P]

> I have noted TONS of references to "DSP" on the FAQ but all of them
> appear to apply to the DSP at IF.
>
> What does the DSP at AF do (capability)?

The K3 DSP accepts input at IF.  It performs functions at both IF and AF.
 Bandpass filters, for example, operate at IF and at AF.  It would be tedious
to list which functions occur at IF and which at AF, and some may change with
future firmweare releases.

73,

Lyle KK7P
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[Grant Youngman]

 
>  Bandpass filters, for example, operate at IF and at AF.  It
> would be tedious
> to list which functions occur at IF and which at AF, and some
> may change with
> future firmweare releases.


But, it is very important important in at least two areas -- notch (auto and
manual) and noise reduction.

There is a substantive difference in performance and effectiveness depending
on whether these functions are inside the AGC loop at IF or if they're done
after the fact at AF.

That would be good information to have .

Thanks .. Grant/NQ5T

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