Made me go look again as well. with 50uV injected into the back I got an AFV of 1773. I first centered the signal in CW and then changed to SSB. I have the auto offset feature turned on so my rig was still centered and I know the frequency of the tone this way. This allows me to use my pitch frequency for the manual notch setting and I know I'm centered (or as centered as the CWT gets me as I did not use my ear this time to zero beat).
Auto notch = -35.9dB Manual notch = -46.2dB Then I repeated the experiment with 1uV injected: Auto notch = -7.8dB Manual notch = -11.2dB Its clear to the ear that the auto notch is not doing as good of a job in comparison to manual but I'd not say that its "not working". Doing this test made me think of an idea though. What about when engaging the manual notch if you were in auto before how about having the manual set to the same frequency that the auto algorithm found rather than 2k. This would then hopefully mean you'd only have minor tweaking to get it perfect. Although hopefully the auto improves a lil in the future too... All in all the auto notch is still doing a quite fair job in my shack! ~Brett (KC7OTG) On Sun, 2009-08-16 at 15:25 -0700, Ron D'Eau Claire wrote: > Ya' made me go look (again) Mike: > > On mine, both auto and manual work, but the manual notch is much deeper than > the automatic notch. > > Using the K2's internal metering while invoking the notch listening to a > clean input from a signal generator, I see a 38 dB drop in level using the > automatic notch and a 51 db drop using manual notch. > > Ron AC7AC > > > -----Original Message----- > G'day, > > To hopefully settle this, at least for my own case, I reloaded Beta > 3r19 and did the following test: > > 14195kHz SSB, AGC F. S7 signal from my K2. With my line out > setting this gave a -46dB signal displayed in Spectrogram 16. > Applying auto notch reduced this to -87dB or better. > > Reloaded Beta 3r25. With the same set up the signals displayed > were -46dB notch off, -72dB notch on. > > I conclude that something significant has changed with auto notch. > > Regards, > > Mike VP8NO > > > ______________________________________________________________ > 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
