Lyle, So, with SSB signal S9 and noise S2 with NR= F1-1 signal shouldn't drop to much??
SSB signals always drop about 3dB. Even signals SSB with good S/N. I understand all what you are saying but how hard it would be to increase AF gain when NR is engaged? Thanks, Mark --- On Fri, 3/21/08, Lyle Johnson <[EMAIL PROTECTED]> wrote: > From: Lyle Johnson <[EMAIL PROTECTED]> > Subject: Re: [Elecraft] K3 SSB Noise Reduction > To: "Elecraft" <[email protected]> > Date: Friday, March 21, 2008, 6:46 AM > > OK, I accept what you are all saying about the gain, I > was just > > postulating :) > > I agree it does drop off, but I didn't think that > much. > > Anyone tried it with CONFIG:AF GAIN set LO? I > haven't, just wondered. > > If there was a config control for an offset, it would > need to be based > > on the 4 'strenghts' I think, not on the Fx > number, but the digit after > > the - > > The first value you see -- the Fx -- has to do with the > aggressiveness > of the filter. The second value you see specifies the > blend of > processed and unprocessed audio. > > Keep in mind always that the denoiser is not a denoiser; it > is a signal > enhancer. It will act to suppress *everything* until it > decides there > is some sort of signal present, then act to pass that > signal. The more > the signal appears to be a pure tone (like CW) the faster > and more > decisively the algorithm acts. The less it looks like a > signal (noisy > SSB comes to mind) the slower and less decisively the > algorithm acts. > This is why the audio level is low to begin with. > > For CW with reasonable S/N, it usually quickly builds up to > the same > overall amplitude as without the NR. > > For SSB with poor S/N, it builds up slowly and to a lesser > overall > amplitude. > > Thus, observations that the signal amplitude sometimes or > often appears > reduced are correct. The disagreements about how much it > is reduced are > also correct. > > It depends on the NR settings, the S/N of the signal you > are listening > to at the moment, the type of signal, the IF and AF > bandwidth... > > FWIW, I usually have mine set to F1-1 or F1-2 for SSB > operation. YMMV. > > 73, > > Lyle KK7P > > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > 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 ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs _______________________________________________ Elecraft mailing list Post to: [email protected] 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
