On 2/5/23 23:33, Sam W2JDB via wsjt-devel wrote:
Hi,
Having followed this thread from the beginning and being a small part
of it (in the beginning) I do have some questions regarding the use of
the
word SPLIT as it pertains to WSJT-X versus its classical meaning on
the HF Bands in CW and SSB, i.e. UP 5 or UP 10 etc.
First, I would you all agree that while you are in the receive state
in WSJT-X, you are listening for the entire band pass beginning at the
base,
i.e. 14.074 plus a small offset such as 200 and extending to the
upper limit of the bandpass that you specified. That does not change
no matter
where you place your receive goal posts (green).
The question now becomes if you are operating split when you move the
TX marker away from the RX marker. Suppose you don't have the SPLIT
function on, that is it is set to NONE. Are you still operating split
if your TX marker is at the edges of the bandpass?
No
Now lets look at it the other way, suppose you set the TX marker at
1500 smack dab in the center, or close to it, and you do have the
SPLIT function on,
Fake It or Rig it does not matter. Are you now operating SPLIT?
No
How about you have SPLIT on and are on offset 2000, calling someone
who is on 500 and he then answered you on offset 2000. Did you
operate SPLIT?
Yes
Here is another question, suppose I am in a QSO, phone, my equalizer
is set to emphasize the lower frequencies and attenuate the middle and
the
highs while my counterparty emphasizes the higher frequencies and
attenuates the lower to the middle. Are we operating SPLIT?
No
How about the situation when you need to use either RIT or XIT
function in the rig, Are you operating SPLIT?
No
As someone said it, no one owns the meaning of the word SPLIT, but the
choice of using the word SPLIT within WSJT-X seems to be the wrong word
as it runs counter to its classical meaning in the HAM community and
introduces confusion. We all know, or should know, that WSJT-X uses a
function,
should we to choose to use it, optimize the output power and minimize
and distortion no matter where the TX marker is. That function simple
shifts things
around so that the audio component is somewhere around the center of
the bandpass.
Rig Split option places the rig in split mode to achieve the TX offset
required for best passband filter audio frequency range.
I have used 'Rig Split' for may years with great results/
73
vk4tux
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