[Elecraft] K2 DSP summary

Fri Dec 19 16:03:01 2003

Thanks guys for the response.

Just knowing they can be used together is a big help. On SSB it "acted" as
one or the other, but was clearly different on CW. So I really wasnt sure
what was going on.

Bob, your first paragragh said it all !!

<snip> XFIL varies the bandwidth of the crystal filter in the  receiver IF
section.  AFIL varies the bandwidth of the DSP unit in the audio section.
They can be used alone or together.

I guess that makes sense now that I think about it. Duh ! but it was just
not acting that way :)

Thanks. On with playing :)

Rich

----- Original Message ----- 
From: "Bob Tellefsen" <[email protected]>
To: "Rich McCabe" <[email protected]>; <[email protected]>
Sent: Friday, December 19, 2003 2:42 PM
Subject: RE: [Elecraft] K2 DSP summary

> Rich, it's actually quite simple.
> XFIL varies the bandwidth of the crystal filter in the
> receiver IF section.  AFIL varies the bandwidth of the
> DSP unit in the audio section.  They can be used alone
> or together.
> In my case, I have both the XFIL and AFIL settings the same,
> so if I set up .5 on XFIL, I just dial up .5 on AFIL also.
> the net effect of having them at the same bandwidth is to
> steepen the effective filter skirts a bit, without altering
> the desired nose bandwidth of the filtering system as a
> whole.
> When setting up my filters with Spectrogram, I start with
> the narrowest AFIL setting and set XFIL to the same setting.
> Then I do the BFO adjustment until I have the desired sidetone
> pitch centered in the net filter passband.  This assumes you
> have decided on what pitch sidetone you want, and have already
> set AFIL to be centered on that pitch.  In my case, 580 Hz.
> Hope this helps a bit.
> Good luck and 73
> Bob N6WG
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Rich McCabe
> Sent: Friday, December 19, 2003 10:25 AM
> To: [email protected]
> Subject: [Elecraft] K2 DSP summary
>
>
> Is there a good summary somewhere of operation for the DSP on the K2.
>
> The manual does not have much detail about the basics of using AFIL /
XFIL.
>
> At first, I thought you either used XFIL or AFIL. One or the other... but
> this does not seem to be the case.
>
> Can someone fill me in? I find the operation confusing !
>
> 73,
>
> Rich
> kd0zv
>
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