Hi Geoff, Thanks for your reaction. I am very curious whether the modern DSP technology can discriminate signal from noice (in CW) better than the human ear and I dont know if it would be boring to just hear a clean tone whilst the signal is at a minimum level. I think it will be an amazing thing to experience as you do expect having to put in a lot of effort to hear the signal through a lot of noise. The second step is if the DSP of the K3 is able to include such a setting or external 'tracking filter' is necessary.
Best, Dick ... . . .._ Geoffrey Mackenzie-Kennedy wrote: > > Hello Dick, > > I am not a DSP expert either, but a tracking filter keying an audio > oscillator will do exactly what you want. In its simplest form a tracking > filter is a phase locked loop, and ICs which can be used at audio for this > purpose have been available since the 1960s and are inexpensive. Also a > tracking filter working at audio can be connected to a receiver's low > level > audio output if one is not already in the receiver. I believe that the DSP > wizards have already designed something that does the same job. > > Tracking filters are very useful when searching for signals below the > receiver's noise floor, at VHF for example, but listening to a keyed audio > oscillator without noise can be quite boring. > > 73, > Geoff > GM4ESD > > > > ----- Original Message ----- > From: "PA3CW" <pa...@planet.nl> > To: <elecraft@mailman.qth.net> > Sent: Saturday, October 17, 2009 8:57 PM > Subject: [Elecraft] Clean 600hz signal, full dsp decoupling possible? > > >> >> Hello forum friends, >> Not being an expert in the world of DSP, but being an experienced CW >> operator i often asked myself this question: Why is there no full >> decoupling between the received signal and the tone in the headset or >> speaker? In other words is it possible that the dsp discrimiates enough >> between signal and noise and steers a clean LF oscillator making a clean >> 600hz or so tone? Is such a setting possible or do i overlook something >> here? Just a little out of the box thinking... >> Dick PA3CW > > > ______________________________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/Clean-600hz-signal-full-dsp-decoupling-possible-tp3841926p3843529.html Sent from the Elecraft mailing list archive at Nabble.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
