tx filter [name=] [num=]More details can be found in the discussion of the rfilter command.
Note: slot 0 is defined to be just clockwise of the home index hole, when looking at the filterwheel as the filters are installed.
tx filter name=J tx filter num=1
To determine the present position type.
If you forget the filter names
tx filter help
You may also want to home the filter occasionally if you don't trust its position. You then must move it to the desired position.
tx filter home tx filter name=Kshort