Bill, Okay, okay I misunderstood the original post. I have used and continue to use both methods. Fake It has proven easier to implement for me so I mostly use that but Rig Split you are correct works, too. But I will suggest there is some confusion in terms that pops up from time to time. You all are correctly using the term "split" in FT8 as a way to keep the audio frequency in the center of the bandpass for reasons that are very sound. From time to time people when hearing the term "split" do think in terms of the more traditional CW or SSB "split" which entails Txing and RXing on two different frequencies .
I went through a long explanation a while back on this blog with a gentleman who was concerned that something was wrong because his radio was "changing frequency" when it would transmit. It took several back and forths to establish with him that this was okay and exactly what was supposed to be happening for very good reasons and that on the other end his signal was exactly where it was supposed to be. To a new user it is not intuitively obvious what is going on. In this case he actually involved a friend across town to prove to himself that his transmitted signal was where he thought it was on the waterfall.. Don't know if you recall that exchange or not. As I recall you could be running Fake It or Rig Split and still TX and Rx on the same frequency on the waterfall. And I am pretty sure that is not good operating practice. In that case in the FT8 sense of the word you are running "Split" but in the CW/SSB sense you are running simplex. It can be a little confusing. Hope this ends this little misadventure. Merry Christmas or Hippy Holidays as is appropriate. John On Wed, Dec 18, 2019 at 7:58 AM Bill Somerville <g4...@classdesign.com> wrote: > On 18/12/2019 12:13, John Kludt wrote: > > Zeev, > > I don't really understand your point - why are you setting the rig for > spilt operation? I sometimes worry that the use of the word "split" > immediately brings to mind the "Up 1 KHz" CW mindset. I work FT8 "spilt" > all the time but I never ever put the radio itself in "Split" mode. All > "split" means in FT8 is that you are transmitting on a different *audio* > frequency > than the one on which your are receiving. And that does not involve VFO-B > or invoking the "Split" option *on the radio.* > > The word "split" in FT8 means the same thing as in CW or SSB in that you > are transmitting on a frequency different from that on which you are > receiving. But having said that, the means to achieve that "split" are > completely different.between FT8 and CW or SSB. > > Maybe I am missing something. Please help me understand why I would want > to physically place the radio in "split" when running FT8 > > Johnny > > Johnny, > > yes you are missing something. WSJT-X utilizes SPLIT mode on your rig to > optimize the transmitted signal. It allows WSJT-X to adjust the Tx audio > tones to always lie between 1500 Hz and 1999 Hz, whatever your chosen Tx > audio offset. This has several benefits including squashing any undesirable > audio harmonics by placing them above the LPF cutoff of your rig's SSB Tx > IF filter, and allowing any Tx audio offset to be used without restriction > by your rig's SSB Tx IF filter pass band. > > If your rig does not support SPLIT reliably using CAT control then WSJT-X > offers an alternative which adjusts the rig's VFO dial frequency just > before and after transmission periods to emulate what SPLIT would do. This > is referred to as "Fake It" split operating on the WSJT-X > "Settings->Radio->Split Operating" panel. > > 73 > Bill > G4WJS. > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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