Posted by
Guy, K2AV on
Nov 15, 2010; 7:19pm
URL: http://elecraft.85.s1.nabble.com/K3-APF-tp5735159p5741107.html
K3 ain't your daddy's analog radio...
Incoming signals are handled as analog signals until they are
converted to a 15 kHz IF. At that point the analog is converted to
digital. All the rest is done in firmware as part of the number soup.
Calling firmware functions IF or AF is really a misnomer. All the
neat stuff is done BEFORE the number soup is converted to an actual AF
voltage. APF number soup, NR digital soup, DSP number soup...
I suppose you could say that some of the numbers were AF numbers and
some of them were IF numbers?
73, Guy
On Mon, Nov 15, 2010 at 11:19 AM, WILLIS COOKE <
[hidden email]> wrote:
>
> Igor, wouldn't you expect to find the Audio Peaking Filter in the Audio
> Frequency section?
> Willis 'Cookie' Cooke
> K5EWJ
>
>
>
>
> ________________________________
> From: Igor Kosvin <
[hidden email]>
> To: Bill W4ZV <
[hidden email]>;
[hidden email]
> Sent: Sun, November 14, 2010 9:12:07 PM
> Subject: Re: [Elecraft] K3 APF
>
> I beg to differ. The TS-930S APF works pretty good in combination with
> narrow (500Hz) set of filters in 2nd and 3rd IF. The problematic part is
> that as far as I recall in TS-930s the APF is in AF, which is little too
> late to correct other shortcomings of the receiver.
>
> 73,
> Igor
>
>
>
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