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Link Loss Measurement Uncertainties: OTDR VS. Light Source Power Meter

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Link Loss Measurement Uncertainties: OTDR VS. Light Source Power Meter

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The OTDR is a very efficient tool for characterizing the elements on a fiber link, such as connectors and splices, because it can measure loss, reflectance and location for each link element. The OTDR also measures the link loss. There are often questions about the degree of uncertainty of the link loss measurement obtained using an OTDR compared to that of the traditional light source power meter (LSPM). This application note compares both approaches to measuring link loss and provides step-by-step best practices to understand and minimize the degree of measurement uncertainty for each device.

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