Patent ID: 6069718
Filing Date: 2000-05-30
Classification: H04B,H04J

Abstract:
A method for measuring the distortion penalty imposed on an information signal travelling on an optical transmission path of a transmitter, a receiver, and a transmission link, said method comprising the steps of:(a) lowering the Q-factor of said transmission path to a value of interest Q.sub.O ;(b) determining an operating point (OP) for said transmission path;(c) in said OP, measuring a first parameter including information on errors in said information signal due to the noise cumulated along said path;(d) in said OP, measuring a second parameter including information on errors in said information signal due to the noise cumulated along said path and to distortion introduced by said transmitter and said receiver;(e) calculating a pair distortion penalty (D.sub.TR) for said receiver and said transmitter by comparing said first parameter with said second parameter.