One simple rule ... Never use any form of noise reduction on digital signals.
Period. 73 Lyn, W0LEN -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Sent: Wednesday, October 20, 2021 8:25 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 NB Info Ed, I have tried for a few years to come up with a good setting for the NB that does not degrade FT8 performance. If you find one, please share it. It seems that any combination of settings I use, reduces the FT8 decode ability greatly for low level signals. The net is a minus in decoding ability with the NB on. I have a very loud set of horticultural lights in my area, about a block away, as the source. My noise level has been reduced lately to only S6... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 10/19/21 1:44 PM, Ed Cole wrote: > I'm trying to use the DSP NB on local noise to improve my 6m reception > of very weak signals (i.e. eme signals). > > There are three ranges of DSP NB T-1, T-2, and T-3 with level settings > of 1 to 7. The levels are self explanatory, but have found no > description about the three ranges (application, function, etc) > > I've inquired of fellow K3 owners that do eme and they say it improves > SNR with no deterioration of digital signals (specifically JT65 or Q65). > FT8 is probably a good test and more widely used. > > Opinions and recommendations. > > My 6m local noise peaks to S7 in the NE and drops to S2 when antenna is > rotated to SE thru West. Elevating 13-degrees also helps, dropping S7 > to S4. > > Tnx & 73, Ed - KL7UW > ______________________________________________________________ > 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 d...@nk7z.net ______________________________________________________________ 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 l...@lnainc.com ______________________________________________________________ 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
