Well nothing would put the issue to bed better than a nice printout of a P3 screen that was sampling the RF signal over a bandwidth of about 6KHz. That's why I would LOVE for Elecraft to continue developing the P3 and expanding its capability.
I don't mind the report, and I take it seriously, but I'd rather be able to prove to myself that I'm clean rather than have a buddy stay up late at night to run tests on my behalf. And the other thing, of course, is the assumption that the decoding algorithm is perfect and doesn't make mistakes, nor that a 6 KHz wide bandwidth can be decoded with no artifacts on a Flex-3K -- these seem to be suspect to me as well. With so many accusations of bad modulation on what is essentially a weak signal mode during a sun-spot maximum, being able to be 100% sure you are clean seems like a very worthwhile goal. I continue to run 5 watts and enjoy JT65, JT9 and PSK31 very much. 73, Bob, WB4SON On Wed, Sep 25, 2013 at 12:19 PM, Rick Bates <happymooseph...@gmail.com>wrote: > If your neighbor tells you it's clean (and s/he knows how to look) then > it's likely the other station at fault. Noise blanking, noise reduction, > poor RX audio (over)driving are huge issues that can make any reception > look bad. > > Bottom line: don't sweat it if your local stations tell you you're clean. > > whiners >> /dev/null > > 73, > Rick wa6nhc > > Tiny iPhone 5 keypad, typos are inevitable > > > On Sep 25, 2013, at 9:13 AM, "Sverre Holm (LA3ZA)" <la...@nrrl.no> > wrote: > > > > As your post indicates, the splattering of JT65 signals has most likely > > nothing to do with your transmitter and setup. It is more likely to be > due > > to the specifics of the JT65 display/decoding algorithm than anything > else. > > I have done spectral estimation for some 30+ years and it reminds me very > > much of the phenomenon called sidelobe leakage. I have commented on that > in > > my blog: > > Overmodulated JT65 on HF? > > <http://la3za.blogspot.no/2013/04/overmodulated-jt65-on-hf.html> > > > > > > WB4SON wrote > >> Yesterday I received an email from a ham a few thousand miles away > asking > >> me to clean up my signal -- I was running JT65 at the time, and he saw > my > >> signal decode on his rig in a half-dozen spots across the waterfall. > >> .... > >> Later that night a nearby ham was nice > >> enough to run a spectral analysis on my signal and found it looked clean > >> as > >> well. > > > > > > > > > > > > ----- > > Sverre, LA3ZA > > > > K2 #2198, K3 #3391, > > LA3ZA Blog: http://la3za.blogspot.com, > > LA3ZA Unofficial Guide to K2 modifications: > http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html > > -- > > View this message in context: > http://elecraft.365791.n2.nabble.com/P3-Feature-Request-Transmit-sampling-tp7579177p7579228.html > > Sent from the Elecraft mailing list archive at Nabble.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 > ______________________________________________________________ > 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
