The first step is to check the cable specifications and make sure that the optical fiber you are using is compatible with the equipment and the environment. For example, you need to verify the type, size, length, and attenuation of the fiber, as well as the connectors, splices . This Applications Engineering Note (AEN 135) explains and recommends standard measurement methods for characterizing optical fiber system performance. This performs a single-ended test that will tell you the dista use a launch and tail fiber. You. Fiber cable quality is evaluated across multiple dimensions: Each parameter requires a specific test method and acceptance threshold. Visual inspection is always performed. d suppliers of electrical construction services.