+ AA6YQ comments below
I think there is an issue with DXLab Suite Commander integration (radio
settings). Under specific circumstances, on Yeasu FT-991,
FTdx10 and similar, it doesn't change a TRX mode to USB when "Mode: SSB" is
checked in radio settings.
Problem exists in "DXLabSuiteCommanderTransceiver::do_frequency" function"
Decision about mode change is based on current mode, not a mode after frequency
is changed.
Probably that function, in first instance probably should perform CmdSetFreq,
then check mode on new frequency via CmdSendMode, and
finally if it's not USB, CmdSetMode should be performed.
Explanation.
Those who are using Yeasu FT-991, FTdx10 and similar touch screen models, know
that Yeasu stores some settings like AMP, ATT,
modulation per band. When the band is changed via choosing a touch screen
button, band settings are restored. Of course you can turn
your VFO from 28MHz to 7MHz, but in that case mode and other settings are from
the 10m band and do not fit to 40m. That's why Yeasu
operators are using band change buttons.
When we translate it to Yeasu CAT commands, a simple frequency change is a FA
xxxxxx command. But it should be preceded by BS xx
(band
switch) command to restore proper band settings.
Original DXLab probably does not perform BS xx, so every time the band is
switched from e.g. 10m, to 40m, the operator must dig into
touch menu and update AMP, ATT and mode.
+ When controlling an FT-991, Commander issues a BS command before changing
bands. It initially did so for the FTDX-10, but working
with an FTDX-10 owner and WSJT-X development team leader Bill G4WJS (sadly now
SK) back in February 2021 revealed that the BS
command has undocumented side effects - like changing the contents of VFO B.
This is also happening when switching bands from WSJT-X. In general it's a
DXLab UX "bug". On the other hand current WSJT-X "force
USB mode" works, because of this "bug".
+ The defect lies in the FTDX-10 CAT command implementation - not in Commander.
73,
Dave, AA6YQ (developer, DXLab)
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