This is on the KX3 firmware list. I'll move it up a notch. Wayne N6KR
On Jan 3, 2017, at 12:16 AM, David Anderson via Elecraft <elecraft@mailman.qth.net> wrote: > Nick, > > Thank you for bringing this up. > > I never did get a satisfactory explanation, I contacted support too but that > didn't get me anywhere either, I don't think they understood my question, > which is quite simple really, why can't we get the same bandwidth in Data > mode as in SSB mode? I think it's a simple oversight, but nobody seemed > interested in acknowledging it or fixing it. > > > 73 from David GM4JJJ > >> On 2 Jan 2017, at 23:54, Nicklas Johnson <n...@n6ol.us> wrote: >> >> Jörg in the Elecraft KX3 group on Facebook had an interesting observation: >> with WJST's waterfall, if the "flatten" mode is on, it produces some >> unusual artifacts in the presence of sharp spectrum drop-offs, and indeed >> if I turn off the "flatten" feature and manually set the zero point for the >> waterfall, the artifacts go away. >> >> It's still an open question as to why the data-a mode has a steep drop-off >> at 400Hz when the PBT settings on the rig would seem to indicate otherwise, >> and the same drop-off isn't there in USB mode. >> >> I see searching on "400 Hz" that GM4JJJ had the same question here on the >> last back in July 2015, but never really got an answer. I basically have >> the same question as this one: >> https://www.mail-archive.com/elecraft@mailman.qth.net/msg183837.html >> >> Nick >> >> >>> On 2 January 2017 at 12:06, Nicklas Johnson <n...@n6ol.us> wrote: >>> >>> I'm seeing some unexpected audio artifacts when using DATA A mode with the >>> latest production firmware on my KX3, on all bands. This is something I >>> observe when the PBT BW is set all the way wide (4KHz) and FC is centered. >>> >>> In DATA mode, there's an audio drop-off between 200 and 325 Hz, with an >>> almost completely dead audio "hole" between 250 and 300 Hz. Then there's >>> some additional noise between 350 and 500 Hz. >>> >>> If I switch to USB mode (with no EQ or audio effects applied, naturally), >>> all of these artifacts go away, and it's perfectly smooth across the >>> spectrum. No drop-off, no noise. >>> >>> Pictures of the waterfalls for comparison here: http://imgur.com/a/AjHu4 >>> >>> Am I doing something wrong, or is there something I should check? I've >>> taken the usual steps, but it's plausible I've missed something. >>> >>> Nick >>> >>> -- >>> *N6OL* >>> Saying something doesn't make it true. Belief in something doesn't make >>> it real. And if you have to lie to support a position, that position is not >>> worth supporting. >>> >> >> >> >> -- >> *N6OL* >> Saying something doesn't make it true. Belief in something doesn't make it >> real. And if you have to lie to support a position, that position is not >> worth supporting. >> ______________________________________________________________ >> 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 >> Message delivered to gm4...@yahoo.co.uk > > ______________________________________________________________ > 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 > Message delivered to n...@elecraft.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 Message delivered to arch...@mail-archive.com
