"DATA A" *is* USB with no equalisation, etc - that's the point. It allows you to easily switch between SSB and data modes without having to adjust audio processing for each.
I just looked at my passband, with spectran, in DATA A and USB modes with the bandwidth cranked up to 4.0kHz (in both cases) with a 2.7kHz filter. Indeed, the passband seems to be cut off at about 200Hz on the low end in DATA A mode, but not in SSB mode. What's that about? http://www.dseven.org/ar/passband.png ~iain / N6ML On Fri, Aug 12, 2011 at 8:40 PM, <cqbi...@q.com> wrote: > I continue to be puzzled by this thread. Given that WSJT (all modes) is > WRITTEN for use on USB by Joe Taylor, WHY would we be interested in utilizing > any K3 mode but USB? > > I have operated 441 and JT65 utilizing my K3 off the Moon, tropo and MS with > no desire to fuss with any other K3 "mode". The K3 works great on USB ... end > of story. > > Here, USB, no equalization, 2.7Khz filter (5 pole), no compression. M Audio > Delta 44 Soundcard, XP dual core machine and no "audio" interface and a > homebrew Opto-isolator for PTT > > In the log:: > > 34 - QSOs JT44 > 702 - QSOs JT65 > 35 - QSOs JT6M > 1057 - QSOs 441 > > Many hours of HF WSPR as well. > > Not all with the K3 ... but many!! > > What am I missing??? > > Respectively, Bill K0AWU EN37ed .... > > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
