All the online definitions I find for 'split' operation are ;
Split means transmitting on one frequency and listening on another.
referring to your own station, without reference to anyone else.
FT8 is not a 'listening' mode. It is visual receiving 3 - 4 Khz wide
including wherever you are TX. decoding via software all of that traffic
decoded.
The RX marker is just a filter to display that rx mark decode slice on
the right pane for easier reading and message store.
So wherever you TX you will always hear/see response at that same point,
on the rx timeslot.
When the software rig/fake enabled attempts to keeps the audio in best
audio passband zone,
it changes the radio TX unmodulated (RF CP) frequency then adds the
audio to maintain TX mark position.
If we were using voice there would be no argument due to the wide audio
frequency range involved.
My whole discussion here has been about the generation of the radio
signal, and the radio frequency shift involved,
before any audio is in the picture.
I quite often use the vfo manually to change RF frequency to bring in
offscale spots, or align F/H stations.
The wsjtx cat commands do the same thing to the vfo in split. Rig split
does TX on Sub vfo and does require the radio to be have split activated.
So to be told the radio is not changing RF frequency during these
changes, CAT or Manual driven, defies logic.
vk4tux
On 29/4/23 03:39, Jim Brown via wsjt-devel wrote:
On 4/28/2023 7:04 AM, Sam W2JDB via wsjt-devel wrote:
Yes I know exactly what split is in WSJT-X.
And it is confusing to long time hams because it was a very poor
choice of words, contrary to what "split" operation has meant on the
HF bands for at least 70 years. "Split" in the context of ham radio
means that you transmit on a frequency different from that of the
station you are calling. The most common application is a rare DX
station will listen for callers above his transmit frequency.
73, Jim K9YC
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