OTDR

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AKA:

Optical Time Domain Reflectometers

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Definition:
OTDRs characterize the integrity of optical fibers by measuring the impedance of applied light pulses.

These optoelectric instruments can determine estimated fiber length as well as attenuation, including splices and other losses or breaks.

Links:
Wisegeek.com OTDR tutorial
Wikipedia: Optical Time Domain Reflectometers


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