Hi All
Aabid i also believe that your problem of designing the component to allow certain power levels above or below the threshold is different from what Ranjeet is asking, He wants to enquire about how to set threshold for the BER analyzer. I hope i had understood it correctly. As far as what Ranjeet is asking i am attaching a link below i hope u get to know how to set threshold as it shows how to calculate BER using a test set. And Aabid in your case u have to design a component as a whole i believe.
Best Regards
Burhan