A tool that measures optical power levels on fiber optic connections to identify signal loss caused by damaged fiber or dirty connectors.

A tool that measures optical power levels on fiber optic connections to identify signal loss caused by damaged fiber or dirty connectors.

• A. nmap
• B. tcpdump
• C. Light Meter
• D. OTDR

Answer: (C)

In fiber maintenance, the key task is to know how much light actually makes it through the link. A light meter measures the optical power at a point in the fiber, usually at the receiver end, and reports it in units like dBm. By comparing this measured power to the transmitter’s output and the expected losses along the path, you can determine whether there’s excessive attenuation. If the reading is lower than expected, it points to issues such as dirty connectors, damaged fiber, or poor splices. Cleaning connectors or inspecting the connection and rechecking helps confirm where the problem lies. Other tools aren’t used for this direct power check. A network scanner or packet analyzer isn’t involved with optical signals, and an OTDR maps faults along the fiber by sending pulses and analyzing reflections, which is more about locating where loss occurs over a distance rather than providing a simple end-to-end power measurement.

In fiber maintenance, the key task is to know how much light actually makes it through the link. A light meter measures the optical power at a point in the fiber, usually at the receiver end, and reports it in units like dBm. By comparing this measured power to the transmitter’s output and the expected losses along the path, you can determine whether there’s excessive attenuation. If the reading is lower than expected, it points to issues such as dirty connectors, damaged fiber, or poor splices. Cleaning connectors or inspecting the connection and rechecking helps confirm where the problem lies.

Other tools aren’t used for this direct power check. A network scanner or packet analyzer isn’t involved with optical signals, and an OTDR maps faults along the fiber by sending pulses and analyzing reflections, which is more about locating where loss occurs over a distance rather than providing a simple end-to-end power measurement.