Which instrument is used to locate faults along fiber by sending pulses and analyzing reflections?

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Multiple Choice

Which instrument is used to locate faults along fiber by sending pulses and analyzing reflections?

The technique uses Optical Time Domain Reflectometry. An OTDR sends very short light pulses into the fiber and measures the backscattered and reflected light as a function of time. Each discontinuity along the fiber—such as a splice, connector, bend, or fault—produces a reflection or loss step that appears on the trace. By converting time to distance, you can locate the exact point of a fault and also assess the fiber’s condition, length, and segment losses. Other tools don’t provide this mapping capability: an OLTS measures overall end-to-end loss but not where along the fiber issues occur; a power meter simply measures returned power at the end; a visual fault locator highlights gross breaks with visible light but doesn’t create a distance-based trace.

The technique uses Optical Time Domain Reflectometry. An OTDR sends very short light pulses into the fiber and measures the backscattered and reflected light as a function of time. Each discontinuity along the fiber—such as a splice, connector, bend, or fault—produces a reflection or loss step that appears on the trace. By converting time to distance, you can locate the exact point of a fault and also assess the fiber’s condition, length, and segment losses. Other tools don’t provide this mapping capability: an OLTS measures overall end-to-end loss but not where along the fiber issues occur; a power meter simply measures returned power at the end; a visual fault locator highlights gross breaks with visible light but doesn’t create a distance-based trace.

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