Check optical attenuation in both directions of fiber optic patch cord
It is common practice to perform the technique in two directions and average the result. Fiber optic testing of a newly installed system not only verifies that the system meets its design requirements, but also creates a performance baseline for all future testing and troubleshooting of t at system. It's measured in decibels per kilometer (dB/km), and it determines how far a signal can travel before it becomes too weak to read. While there are many different fiber optic cable tests, the most common version is an insertion loss test, also known as an attenuation, jumper, or connectivity test.
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