On 27/10/2018 19:55, Ravella Russ wrote:
Thanks for the replies everyone.
I’m trying to understand what WSJT-X is assuming about Flex 6xxx
radios that results in the odd behavior I described. WHY I want to
operate split is irrelevant to the question but just for information,
I am trying to experiment with different ways of using WSJT-X, mostly
just to understand it. I’ve read the documentation through and this
aspect is not well covered. My experience is use cases often follow
(the suggestion regarding JA operation on 160 is potentially a good
example). Another is it appears to BE doing something that doesn’t
make sense and it may be helpful to report a bug but, again, that’s
irrelevant to my post.. All I’d like to know is if anybody actually
KNOWS what WSJT-X does or is trying to do in split mode when set to a
Flex 6xxx radio.
Hi Russ,
there are multiple considerations here. The Hamlib FlexRadio 6xxx driver
doesn't handle split in the same way as other rig back ends does and as
a result it doesn't play well with WSJT-X. You do have the option of
using the TS2000 emulation in Smart SDR, the Hamlib driver for the
TS2000 has some special handling for emulators like Smart SDR.
The way WSJT-X uses SPLIT on a rig is not for using a separate Tx and Rx
frequency, instead it is used to manipulate the audio tones sent to the
rig such that they always lie in the 1500 - 2000 Hz range. This is done
by using a single nominal VFO dial frequency and adjusting the Tx audio
tones in concert with the Tx VFO dial frequency to achieve the desired
Tx audio offset. For WSJT-X to support traditional split operation it
would be necessary to define two base operating frequencies, one for Rx
and one for Tx. This would be in addition to the Rx and Tx audio offsets
specified on the WSJT-X main window. this might, for example, be done by
having a facility to optionally specify a Tx dial frequency for each Rx
dial frequency defined in "Settings->Frequencies->Working Frequencies".
For a complete traditional split operating facility I would expect there
to be a "listen on Tx VFO" feature allowing the user to quickly monitor
their own Tx dial frequency to aid choosing a clear frequency. None of
this is trivial and would require major changes to WSJT-X.
73
Bill
G4WJS.
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