Re: eye pattern
CRO display ur going to get when signal is having error is feeded to it via vertical amplifier input and a trigger input to the horizontal amplifier .....if signal is having more noise means....the figure will be fully closed and for no or less noise it will be opened one.....if signal is having error at point and no error some point, the figure wiil close and open..this event is like opening and closing of human eye.so,it is called as eye pattern or eye diagram..from the figure,the ratio between height of the opening at full noise to that of no noise will give amount of error present in it
It comes under "Lissajous figure"
this is a scoring point for CRO applications ..ie its usage to study error phenomena...