I have an old Hughes system from 1996 and it has a mode for 16x9. Although, I only have a 4x3 TV, setting it to 16x9 makes no difference at all. The menus aren't tall and skinny. Everything's the same. I figured a 16x9 mode would make the menus all anamorphic, but it don't. What does this 16x9 mode do?