The message is spend time just listening to the band and get a feel of the many aids available to achieve the very best performance that will suit you style of operating, it took me 6 months to master my Orion and I think with the continued development of the K3 we need to take note of all the release notes as Stewart had pointed out, Thanks Stewart 73 Peter G3MLO
GW0ETF wrote: > > To all NR 'confusees', > > Since getting my K3 #145 I've seen the discussion about Noise Reduction > go round the block 2 or 3 times and I have to wonder if folk bother > reading the FAQ which I've copied below... > > <<<<<<<<<<<<<<<<<<< > How does the Noise Reduction work? > > NR depends on correlation of the present input with previous input. The > system does not actually provide Noise Reduction; it provides Signal > Selection. In other words, its default is to pass nothing at all. It has > to believe there is a signal present, and then it builds a filter, or > set of filters, around the spectral components of the signal it thinks > is there. > Random noise has no correlation, voice has moderate but not perfect > (unless you whistle a pure tone) and CW has excellent correlation. As a > result, noise is heavily suppressed (no filter is built to pass it), > voice is partially suppressed (hence it needs some additional gain to > compensate for this effect so the same AF level will produce about the > same audio level with a moderate S/N speech signal) and CW is hardly > suppressed at all (hence it does not need any gain boost). > NR is not recommended in Data Mode. Data is already getting a matched > filter in the demodulator. You might lose a few symbols as the NR > settles around the signal, and it might suppress a very weak signal that > you could otherwise copy. > NR in the end is intended for modes you listen to. > >>>>>>>>>>>>>>>>>>> > > Seems clear to me; I'm no expert (DSP 'dummy') but it tells me for one > thing that adaptive dsp filtering is going to work better with cw than > phone. There is more on it in 'Operating Tips' and somewhere Lyle gave a > good explanation of the different settings available but I can't find it > now - anyone know whether it's lurking somewhere on the web site? > > Have fun (I am.....!) > > -- > 73, Stewart Rolfe, GW0ETF (K3 #145) > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@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 > > -- View this message in context: http://n2.nabble.com/Dummy%27s-Guide-to-Noise-Reduction-tp582033p582243.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@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
