Tool Used: OptSim
This example demonstrates using OptSim in block mode to analyze analog CATV transmission systems. Here we consider distortions such as composite second order, composite triple beat, and intermodulation distortion. In fiber-based analog CATV transmission systems, there is usually one wavelength used for the signal transmission with multiple analog RF channels modulated onto it. While BER is the most common performance metric in a digital transmission system, measurements of distortions are the critical metrics in an analog transmission system. These results can be produced through simulations in OptSim. Let us first consider a two tone direct modulated analog transmission system shown below: