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
