From instrument scientist:
If the frequency box is selected, pressing any of the arrow key on the keyboard
will change the frequency of the choppers without any warning. The problem is
increased, as in IBEX for changing the phase of the choppers the number must be
typed in the apropriate box and then "return" must be pressed, what hightlights
the frequency box.
It would be ideal if after changing the phase of the choppers the frequency box
was not auto-selected.