Isn't SHIFT remembered separately? 73, Guy. On Fri, Aug 12, 2011 at 6:28 PM, iain macdonnell - N6ML <[email protected]> wrote: > On Fri, Aug 12, 2011 at 10:12 PM, Joe Subich, W4TV <[email protected]> wrote: >> >> > 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? >> >> That should not be a problem since applying modulation (audio tones) >> that low will result in "tilt" on transmission in any case. In my >> experimentation with JT65 on HF working below 300 Hz or so resulted >> in power output varying with the specific tone even in DATA A with >> no TX EQ presumably due to the skirts of the roofing filter on TX. > > Yeah, I wouldn't suggest transmitting that low in the AF range, but > one might be able to decode a received signal down there (then perhaps > QSY down 1kHz and call him, if interested). > > In any case, I find the discrepancy between the passbands of DATA A vs > USB modes curious - can anyone (Lyle?) explain it? > > ~iain / N6ML > > > > >> On 8/12/2011 4:52 PM, iain macdonnell - N6ML wrote: >>> "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,<[email protected]> 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:[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 >>> >> ______________________________________________________________ >> 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 > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected]
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