An OTDR (Optical Time Domain Reflectometer) is the most accurate instrument for detecting fiber defects. It measures line and event attenuation, and from this, together with the propagation time of the reflected pulse, can determine the line length, splices and connectors. When measuring with two wavelengths, a bending radius violation (macrobend) can be detected and localized. The OTDR in the ARGUS® 300 is available with 1310 + 1650 nm or with 1310 + 1550 nm.

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