I did a quick 'n dirty cell phone video of the results of this on SSB. You NEED to use headphones to hear the difference because the cell recording has crappy audio. This test is done on 75 meters, dialed into a plasma TV generating noise. There is no intelligent signal present - just the noise floor and the plasma tv. In this test, I found that a DSP NB setting of 2-3 worked best - incidentally, is usually use 2-2 or 2-3 on a daily basis but I've never been really happy with any of the NB settings. Incidentally, I also tried it in the video with the AGC turned ON and that had good results, as well.
I need to find an actual intelligible signal to do this on, but the preliminary results are quite impressive. I'd LOVE to have a DSP NB setting that would activate this without having to permanently alter the filter settings. Here and watch for yourself http://1drv.ms/1PTCo6y Tim AE6LX On Wed, Feb 3, 2016 at 9:22 PM, Scott Ellington <k...@sdellington.us> wrote: > If I understand it correctly, reason for the wide crystal filter is that a > narrow filter stretches the noise pulses, making blanking ineffective. > (The idea is to blank out the noise, without blanking out a lot of the > signal.) The wide filter passes the narrow noise pulses to the DSP, which > can then blank them out like a hardware blanker. The result is passed to > DSP bandpass filter. > > I don't have the 6 kHz filter, but I'd like to know how well it works. > One of my (few) disappointments with the K3 is the noise blanker, which > never seems very effective on line noise. The conventional noise blanker > in my old FT-1000 can often reduce the noise dramatically, but only when > there are no strong signals nearby. Alas, that means it never works > during contests. > > Long, long ago, someone (Collins?) proposed using a second receiver to > control a noise blanker, with the second receiver tuned to a nearby clear > spot wide enough for a filter much wider than that of the primary receiver, > say 15 kHz. That might be just outside the ham band, for example. Then > the main receiver would retain its excellent immunity to strong nearby > signals. Now, if the subreceiver in the K3/K3s could be made to do that, > I'd buy the 15 kHz filter instantly. > > 73, > > Scott K9MA > > -- > Scott Ellington K9MA > Madison, Wisconsin, USA > > k...@sdellington.us > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ae...@worldwidedx.com > -- Owner, worldwidedx.com AE6LX, Amateur Radio ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
