[Elecraft] K2 DSP vs SCAF audio filter

[Robert]

Comparing DSP to SCAF is not easy to do since they are not the same thing. 
In SCAF, you're dealing purely with the Analogue signal and varying the BW 
of the audio signal using switched capacitors.  This is effective but lacks 
noise reduction.  DSP on the otherhand will not only give you auto notch and 
allow you to vary the BW of a received signal, it also provides noise 
reduction by actively filtering out background noise to its allowable DB 
level.  Unfortunately in doing so, digital artifacts can remain on the 
signal.  In most cases, these artifacts are not very noticeable.  Some have 
complained that DSP does not work well on CW.  My personal experience is 
that the DSP for the K2 does an admirable job and in most instances is not 
needed with the already excellent filtering available as standard in the K2.
SCAF filtering works well in narrowing the BW but does not have Noise 
Reduction like DSP has.  In fact it is not always necessary to narrow the BW 
of a signal when using DSP. Many occasions Noise Reduction is all that is 
needed.  I have 2 K2 radios and one has the DSP while the other has the SCAF 
filtering.  I'm very pleased with both but the edge goes to my K2 with the 
DSP filter.

Robert VE3RPF


----- Original Message ----- 
From: "brian" <brianb at brianboschma.com>
To: "Elecraft List" <Elecraft at mailman.qth.net>
Sent: Thursday, December 30, 2004 12:59 PM
Subject: [Elecraft] K2 DSP vs SCAF audio filter


>
> Gentlemen and Ladies,
>
> Have any of you compared the K2 DSP with a SCAF audio filter ?  I have a
> SCAF and am considering the K2's integrated DSP but really wonder if
> there, in the end, will be a significant change in my ability to copy
> weak signal CW signals.
>
> Regards,
>
> Brian   n6iz
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Anti-Virus.
> Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004
>
> 



-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004