js8call/doc/user_guide/en/faq.adoc

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[qanda]
My displayed spectrum is flatter when I do not check the *Flatten* box. What's wrong?::

_WSJT-X_ does not expect a steep filter edge within the displayed
passband. Use a wider IF filter or reduce the displayed passband by
decreasing *Bins/Pixel*, increasing *Start*, or reducing the width of
the *Wide Graph*.  You might also choose to re-center the filter
passband, if such control is available.

How should I configure _WSJT-X_ to run multiple instances?::

Start _WSJT-X_ from a command-prompt window, assigning each instance a
unique identifier as in the following two-instance example.  This
procedure will isolate the *Settings* file and the writable file
location for each instance of _WSJT-X_.

 wsjtx --rig-name=TS2000
 wsjtx --rig-name=FT847

Rig control through _OmniRig_ seems to fail when I click *Test CAT*.  What can I do about it?::

_Omni-Rig_ apparently has a bug that appears when you click *Test
CAT*.  Forget using *Test CAT* and just click *OK*.  _Omni-Rig_ then
behaves normally.

I am using _WSJT-X_ with _Ham Radio Deluxe_.  All seems well until I start HRD Logbook or DM780 running in parallel; then CAT control becomes unreliable.::

You may see delays up to 20 seconds or so in frequency changes or
other radio commands, due to a bug in HRD.  HRD folks are aware of the
problem, and are working to resolve it.

I am running _WSJT-X_ under Ubuntu.  The program starts, but menu bar is missing from the top of the main window and the hot-keys don't work.::

Ubuntu's new "`Unity`" desktop puts the menu for the currently active
window at the top of the primary display screen.  You can restore menu
bars to their traditional locations by typing the following in a
command-prompt window:

 sudo apt remove appmenu-qt5

+
Alternatively, you can disable the common menu bar for just _WSJT-X_
by starting the application with the environment variable
QT_QPA_PLATFORMTHEME set to empty (the space after the '=' character
is necessary):

 QT_QPA_PLATFORMTHEME= wsjtx