Oh yes, I kind of forgot the most obvious :) It is KX3, running on a beta firmware (2.33, not sure it is released yet).
The only difference between the two sections of the screenshot are USB and DATA A mode, nothing else changed. Very strange. The "Flatten" checkbox is checked, I will try with the checkbox unchecked tomorrow morning and report. On other programs like fldigi, the only difference between USB and DATA A (both with widest possible filter bandwidth) is a cutoff at 500Hz on DATA A whereas USB goes a bit lower. Thanks for all your feedback so far! Ed W6ELA On Fri, Jan 23, 2015 at 9:50 PM, Matt Zilmer <mzil...@roadrunner.com> wrote: > Yep, there is always a first time for any mode. I remember when PSK31 > was introduced and I tried it. Had a problem similar to yours, but on > a FT101EE at that time. > > I've used JT65 on my K3 many times, with DATA A as the mode. I can > assure you that it works fine. But that is here, and with a different > configuration (well, probably). > > The spectrum you posted was a surprise. You should be seeing tones > between 1270 and 1953 Hz, and they would show as discrete "blips". The > spectrum shown is not at all like that. > > I'd be scratching my head too, Ed. It may be something simple, and > probably is. I'll think about it a bit though. Maybe others will > consider this as well. It's a little perplexing. > > Which Elecraft transceiver are you using? Both the K3 and KX3 support > DATA A modes. > > 73, > matt > W6NIA > > On Fri, 23 Jan 2015 20:51:23 -0800, you wrote: > > >I tried JT65 for the first time today (there is a first for everything, > >right?), and to my surprise, I discovered that for some reason, the DATA > >mode is not usable on that program! > > > > Not 100% sure the mailing-list allows images in emails, so I will try to > >describe the issue as clearly as possible: > > > > - In USB mode, with a flat EQ, I get a flat spectrum apart from the > >actual JT9/JT65 chirps, from 200Hz to 3000 Hz > > - In DATA A mode, on the other hand, I get a peak around 100Hz, > nothing > >until 300Hz, then a huge noise peak raising from 300Hz, peaking at 500hz > >and going slowly down to 1kHz. Then a big dip in signal/noise centered > >around 2kHz. In other words, very distorted signal! > > > > Image speaks for itself: http://imgur.com/QyqpzEh > > > > I am pretty sure this does not come from the radio, with a simple > >audio waterfall displaying at the same time in another program I don't see > >this artifact, but I wonder if anyone else has seen this and can explain > >it? Could it be an FFT artifact linked to the sampling rate of the > >soundcard and an internal sampling rate of the radio in DATA mode? > >Something else ?? > > > > Kind of scratching my head on this one, maybe smarter/more experience > >Hams on the list will have an answer! > > > > Oh yes: WSJT-X is running on a Mac, not that it should really matter. > > > >73 de Ed, W6ELA > >______________________________________________________________ > >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 mzil...@roadrunner.com > Matt Zilmer, W6NIA > -- > "Give me six hours to chop down a tree and I will > spend the first four sharpening the axe." -A. Lincoln > ______________________________________________________________ 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
