APF has a very significant improvement on weak signals in the noise. I completely agree with prior posters. HOWEVER...
I would like to be able to ***VARY THE Q*** with the width control and LEAVE IT ON with a mild Q, and sharpen it as required. If I can back it out to 2 dB with a width function I would probably leave that on all the time and grind in as needed. I already do that with Width in weak cases that are on frequency. ONLY when APF is on could we have the WIDTH tap toggle between APF Q displaying APF Q=3 in lower display and between Roofing/DSP bandwidth displaying BW 0.40??? You could do the same thing with SHIFT to go back and forth between adjusting Roofing/DSP SHIFT displaying FC *0.45 and APF *0.45. Using WIDTH to control Q is intuitive. When APF is in there is no moderate setting, it takes over the passband and makes copy of a signal up band difficult. It will require repeated use of DUAL PB to go in and out for weak signals and back out for normal use. Use of a HOLD function as a frequent change is a problem. In trying to get used to the HOLD on DUAL PB to go in and out of APF to hear in the rest of the channel, I repeatedly hit NTCH instead. HOLD's are only good for settings that persist for a while during operation. E.g. I don't need APF ONLY as a better substitute for 50 Hz. I need it to work ALSO as a milder center emphasis inside the 400 Hz roofer, and be able to twist a knob somewhere to move between mild and sharp. Even with what appears to be only a 2 dB peaking around 450, the MP was improved inside its excellent dual INRAD 400 selectivity. If this is not done, it will be very difficult to use it well in a contest. No easy-to-use variable Q is a deal-breaker for me. In the end for contests it will cost Q's and will have to tell people to leave it off, just like NR. Only turn it on for a really weak one if you can remember how, and then turn it right back off. Then when I get home chasing weak DX I'll turn it all back on again, and work some stuff I couldn't hear before. 73, Guy. On Fri, Oct 29, 2010 at 11:01 AM, drewko <[email protected]> wrote: > Yes, I realize that. I would like to compare what is heard using the > APF filter to what is displayed by BeaconSee with its sub-noise signal > recovery algorithms. > > 73, > Drew > AF2Z > > > On Fri, 29 Oct 2010 10:55:38 -0400, you wrote: > >> >>I think you may be confused about what APF is. It is NOT a waterfall or any >>kind of visual indicator. It IS an Audio Peaking Filter (APF) meant to >>enhance weak signal audio using the processor between your ears. It will >>not automatically show you where weak signals are in a spectrum, but if you >>know approximately where to look (either from a Packet spot or waterfall >>trace) it can help your ear/brain decode the CW audio buried in noise. >> >>73, Bill > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
