To change a numeric parameter like Azimuth, Elevation or Polarization. Here an example for the azimuth axis: select SET AZIMUTH from the main menu.
The lower display line shows the actual value. You enter the new
value, using the number keys. The arrow up key adds a (-) in front of
the numeric value and the arrow down adds a (.). The key 
clears the entered value.
To accept the edited value, press 
. This checks the entered value against its limits
and executes the parameter change. Pressing twice (the first key press clears the display) leaves
the editing mode without changing anything.