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Introduction OTDR
Optical Time Domain Reflectometry (OTDR) is a method for measuring and testing optical fibers. With the OTDR method, faults in fibre optic cables can be detected directly, but also transmission parameters can be measured and analysed.
In OTDR measurement, according to the method, a light pulse is fed into the fiber from the source of the OTDR device. This light pulse is reflected within the optical fiber by backscattering, backscattering, but especially at cable breaks, splices, fiber optic connectors and adapters, and returns to the OTDR measuring device, where it is measured and analyzed. From the transit time of the reflected light pulse, the location of the fault can be determined immediately. Conclusions about the type of fault can be drawn from the attenuation curve of the pulse.