hi all,
i my self thinks now that penalty for eye opening can be both positive and nagative
case1:positive penalty: in this situation we require to compenate the losses of any parameter in design such as length.
case2:nagative penalty: there may be case where excess of power may create nonlinearities and other thermal noise at reciver end,
hence we should reduce the power, threfoe the penality is nagative.>>>>>>>>>>>>.
with reagards