Hi Doug, I never say something can't be done ;-)
There only is no seperate AF EQ in the K3. The RX EQ is directly modifying the IF response, in other words RX EQ acts directly at the DSP IF filter stage, that is the way Lyle designed it. The data of both IF slope and RX EQ are combined to a single IF passband calculation. In that sense the RX EQ is no "extra filter"... So f.i., if you design a certain steep HPF with the RX EQ you are in fact doing exactly the same thing as turning down the low flank in IF. I think that's why Lyle&wayne advised not to use the RX EQ for such goals. It would be nice though to have a "library" of EQ settings, but I personally would prefer that in the K3 itself (EQ per mode, bypass on/off switch, EQ preset memory) 73' Paul PD0PSB GM0ELP wrote: > > Hi Paul, > > The bandwidth and Notch should be done at the IF stage not the AF stage, I > think everyone knows this. There has never been a question of where it is > better to taylor response. Of course it's better to do these things at the > IF stage. > > I am suggesting a 'cumulative' IF and AF response 'combined'. I could > manually taylor (approximate) any required AF response using CAT commands > and the available 8 audio bands and gain/attenuation levels. Why wouldn't > software be able to do that? It's not a question of how steep the slopes > are, its a matter of using an AF feature in the K3 to augment the IF > performance. > > If there was a software tool available to approximately track AF to IF > response would you try it? I would, and I think it is possible. Can you > give me a reason why it isn't possible? > > Doug GM0ELP > > > ----- Original Message ----- > From: pd0psb [via Elecraft] > To: GM0ELP > Sent: Tuesday, December 29, 2009 7:28 PM > Subject: Re: K3 RX Equaliser SW App? > > > Hi Doug, > > Some time ago Wayne and Lyle explained that the RX EQ is not meant as an > extra "selectivity tool". > It's there to do the last tailoring of passpand response, make up for > room acoustics or speaker/hp response. The RX EQ modifies the IF passband > and is not a seperate post-detector AF filter. > > Notch/HPF/LPF/etc can better (and much steeper) be done with bandwidth > and notch controls. > > 73' > Paul > PD0PSB > > > > > GM0ELP wrote: > Hi All, > Does anyone know of a software application for controlling the K3 rx > equaliser to specifically create easily adjustable audio filtering toys? > > Ideally I would like something that replaces the manual manipulation > of individual graphic equaliser sliders with more automated/general filter > creation controls i.e. lpf/hpf(buttons), cuf-off freq (text entry box), > peak/notch (buttons), magnitude and sweep (sliders). > > I don't have a specific use in mind, other than to be able to use the > rx equaliser whilst operating. > > I have in the past created cat control sequencies for various filter > functions and saved them individually as macros, but useabilty was poor. > > Any ideas/suggestions welcome. > > > > ------------------------------------------------------------------------------ > > View message @ > http://n2.nabble.com/K3-RX-Equaliser-SW-App-tp4227853p4229117.html > To unsubscribe from K3 RX Equaliser SW App?, click here. > > > -- View this message in context: http://n2.nabble.com/K3-RX-Equaliser-SW-App-tp4227853p4229468.html Sent from the [K3] 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
