For the OTN and DWDM systems

the detection of the optical signal-to-noise ratio may produce the difference results.This paper analyzes the reasons of the problem from the aspects of technical principle

detection method

calculation method and applicable conditions.This paper summarizes the specific solutions and considerations.This paper can provide a reference for the project acceptance test and operation and maintenance

because the concrete solution and the attention are summarized.The relevant conclusions of this paper will help to reduce or eliminate the impact of this difference.