Many fewer harmonics generators now than in the past.
WA1SXK and I went on the war path for the last several years contacting
everybody we saw and getting them fixed.The FT8Noise paper on my QRZ page is
the result of testing with numerous rigs and explains it all.
Mike W9MDB
On Tuesday, September 5, 2023 at 08:37:07 AM CDT, Lance Collister, W7GJ via
wsjt-devel <wsjt-devel@lists.sourceforge.net> wrote:
TNX Mike! I am amazed how many people I keep seeing on the air who are
transmitting audio harmonics and don't understand that they need to have the
XMTR frequency changed if they want to select XMIT offsets lower than 1500 Hz.
They insist that they have checked their audio and it is not overdriving their
amp...
GL and VY 73, Lance
On 5 Sept 2023 11:48, Black Michael via wsjt-devel wrote:
No -- the target is not good quality of signals -- that's misleading
too....it's all about shifting the audio (actually shifting the suppressed
carrier).
#1 Avoid transmit band edges (rigs can actually transmit outside of their
bandpass) #2 Avoid harmonics #3 Avoid non-linear power behavior (some rigs
don't transmit the same power on all frequencies)
This thing has historically been brought up every few years and nobody has
come up with better terminology. I will propose this.
Box title -- "Audio shift method" in lieu of "Split Operation". Then we leave
the others alone but update the tool tips to use "audio shift" in their
description instead of "split". None/Rig/Fake It
No mention of split needed except in the manual describing what this does in
detail.
Mike W9MDB
On Tuesday, September 5, 2023 at 06:10:38 AM CDT, Henryk Majcher via
wsjt-devel <wsjt-devel@lists.sourceforge.net> wrote:
Hi Jim
I agree - it is a very frustrating situation, especially for foreign users
with English language problems.
The target is the good quality of signals. So the title: "Split Operation" is
bad. Split operation is one of the ways to get it. "None" is OK. "Rig" is not
OK, it should be "Rig SPLIT". "Fake It" is not OK, it should be "Like Split" or
"Kind Of Split" or "Special Split" or "WSJT Shift".
I mean "SPLIT" - the button and "Split" - the word.
My proposal title and others is:
Signal Quality Special Management
O None O Rig SPLIT O WSJT
Shift
Sorry for poor English
73 Henryk SP3E
wt., 5 wrz 2023 o 10:29 Reino Talarmo via wsjt-devel
<wsjt-devel@lists.sourceforge.net> napisał(a):
Hi Jim and all,
I support this proposal. I know that on the rig's point of view the
functionality is the same as in the classical "split". What is seen on the
band may or may not be the same depending how the user selects the
transmission frequency.
In addition some words could be added to note that the activation of the
'Hold Tx Freq' and selecting a 'free' spot on the waterfall is the same
working principle as the classical "split". In FT8 case the transmission
frequency (red mark) is selected outside (not only upper side) the reception
frequency (green mark). The waterfall is a bandscope and decoder is a
build-in FT8 skimmer.
73, Reino OH3mA
> -----Original Message-----
> From: Jim Brown via wsjt-devel [mailto:wsjt-devel@lists.sourceforge.net]
> Sent: tiistai 5. syyskuuta 2023 3.57
> To: WSJT software development <wsjt-devel@lists.sourceforge.net>
> Cc: Jim Brown <k...@audiosystemsgroup.com>
> Subject: [wsjt-devel] Split
>
> Team,
>
> I've several times observed in the more public forum that "split" was a
VERY bad
> word choice to describe the TX shift devised to prevent transmission of
audio
> harmonic distortion. The practice is great, the word choice is terrible,
because it
> is in conflict with what has been standard use of the word "split" in ham
radio
> for almost as long as I've been a ham (and I was licensed in 1955).
>
> "Split" describes the practice whereby a DXpedition transmits on one
frequency
> and listens for callers in a range of frequencies (usually above his TX
frequency),
> typically 10 kHz wide for CW, 25-35 kHz on SSB), and for at least 50
years, rigs
> have a button labeled "split."
> This is NOT what you've written the code to do! It confused the user who
asked
> me for help, and it likely has confused others. It confused me when I
first read it,
> and I understood what you were doing and why.
>
> I strongly urge two changes be implemented. First, on the Settings page
where
> "Split" is used, add in parentheses, "TX Shift." Second, modify the WSJT-X
> documentation in the same way, and add at least a paragraph to explain
that it
> isn't really "split" in the sense of the practice that has been used for
more than
> 60 years.
>
> 73, Jim K9YC
>
> = = = = = =
>
> All is well here now:) You're the Man!
> tnx agn
> Jim/k2hn
>
> On Monday, September 4, 2023 at 04:23:25 AM EDT, Jim Brown
> <j...@audiosystemsgroup.com> wrote:
>
>
> On 9/3/2023 11:03 PM, Jim Murray wrote:
> > Hi Jim,
> > I wonder if I could impose on you with just one thing that's giving me
> > fits on the K3s. Decided to set it up for ft8. Used k4tax's
> > settings:Mic sel - Line in, Data MD- Data A. These settings using only
> > usb cable. I also used his wsjt settings.
>
> I have the several of the original K3, no K3S, so don't know setup with
> USB.
>
>
> > All was going well until I
> > messed with some vfo settings I think. With the original settings
> > somehow vfo A and B and split get involved. After I messed around
> > seeing if all could be done with just vfo A I messed things up.
>
> OK. The confusion is WSJT-X's improper use of the word "split." It's NOT
> "split" as we hams have used the word for at least 60 years, but the
> guys who wrote WSJT-X probably wouldn't know anything about CW or SSB if
> it bit them in the ass.
>
> The proper words for what they're doing is TX Shift." What they are
> doing is shifting the TX audio frequency in one direction and TX RF dial
> frequency in the other, so that the second harmonic of the TX tone is
> always outside the TX SSB filter.
>
> You should NOT set the radio for split. Simply set "split" on the Radio
> tab in WSJT-X for "Fake it." When you go into transmit, you WILL see the
> VFO shift up on TX if your AF tone is below 1500 Hz, then shift back to
> the right dial frequency on RX. If your AF tone is 1500 Hz or higher, no
> shift occurs.
>
>
> > Now, tx
> > jumps to B and is .50 off. 21.074.00 jumps to 21.074.50 on transmit
and
> > shows the same on wsjt. .50 off. Well, I've spent hours trying to get
> > rid of the .50. Probably touched things I shouldn't have. I can't
find
> > anywhere where .50 shows up. I tried changing filter settings etc.
> > nothing. Hate to be a PIA but will no longer do so. I've learned that
> > the k3s does not like messing with settings unless you know what your
> > doing:) Not that all user friendly as some I've had. But- Rx is
> > amazing. Last night I heard 3 China stations and connected with one
> > with 45W into an endfed, 15M ft8. My last ftdx10 never heard China no
> > less connected with one.
>
>
> Best K3 settings are for IF bandwidth of 3 kHz, set the waterfall to
> start at 200 Hz, set the Bins/pixel to 4. Set FAST AGC, set audio drive
> from K3 to computer for decoding so that, WITH SIGNALS, the green bar is
> as close to 80 as possible without ever turning red. This gives maximum
> dynamic range. You can ride gain on the green bar with the RF gain
> control.
>
> 73, Jim K9YC
>
>
> _______________________________________________
> wsjt-devel mailing list
> wsjt-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/wsjt-devel
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Lance Collister, W7GJ(ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR,
5W0GJ, E6M, TX5K, KH8/W7GJ, V6M, T8GJ, VK9CGJ, VK9XGJ, C21GJ, CP1GJ, S79GJ,
TX7MB, TO7GJ, 3B9GJ)
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USA
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URL: http://www.bigskyspaces.com/w7gj
Skype: lanceW7GJ
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