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Understanding and Mitigating OTDR “Gainers”

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Understanding and Mitigating OTDR “Gainers”

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  • Author: Maury Wood
This localized increase in reflected optical power some distance from the launch point is fully unexpected, and can be confusing, particularly for non-expert OTDR users. Gainers are false positives that potentially lead to errors in fiber channel loss calculations and data rate impairments on high bandwidth links requiring additional truck rolls and other unnecessary operating costs to resolve. What are OTDR gainers? How are they caused? And how can they be mitigated?

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