All of that sounds like an excellent plan and thanks for the sound bites. Bob
Trevor Smithers wrote: >> WELL PHOOEY, that won't do. We will have to work on how optimize the >> settings > > I've been hesitant to mention NR because everyone seems satisfied with it, > however > personally I've never found the results to be as good as the outboard units > from > companies such as BHI in the UK and Michels-Engineering in Germany in getting > rid of, for example, low band "frying bacon" type qrn and general hash etc . > The > german unit is designed specifically for the extraction of the speech > waveform > when surrounded by noise. BHI is similar but works with cw as well. > > NR was greatly enhanced with the introduction of Block LMS but to my mind/ear > still introduces a sort of muddiness to the audio, a loss of brightness etc > which the > outboard units (especially the Michels unit) do not. Remember I'm talking > weak > signal SSB, 160/80/40 gray line dx etc. > I suspect that the cw guys are quite happy with NR as it stands. Perhaps we > need > two separate NR systems, one specifically designed for the recovery of speech > and the other for cw, in the presence of noise. > > Its difficult to describe in words so here are a couple of links to some > audio > samples of both units in operation > > http://www.home.vrweb.de/michels/sound_demo.htm > http://www.radio.bhinstrumentation.co.uk/html/demonstration.html > > There is a downside to using these units in that they are only capable of > working > with a mono input so I loose the binaural (which is a shame) and sub rx > functions, > but hey you can't have everything.............. or can we :-) > > Regards to all > Trevor G0KTN > > > -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair "Taking fun as simply fun and earnestness in earnest shows how thoroughly thou none of the two discernest." - Piet Hine _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
