AN-145 Measuring ILRL and Verifying Polarity

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  AN-145 Measuring Insertion Loss and Return Loss and Verifying Polarity

Overview

Polarity testing and Insertion Loss (IL) testing are crucial steps in the production and assessment of multi-stranded fiber optic cables. With certain setups, IL can be measured while verifying polarity.

The IL test measures the amount of light lost when traveling through the DUT en route to the detector. A test setup that uses a multichannel source and multichannel power meter evaluates the light paths of a multifiber device under test (DUT) one at a time. If any of the fibers are crossed or broken, light does not reach the OPM on the expected channel resulting in dark values. Using an Insertion Loss and Return Loss (RL) meter as the source instrument and a multichannel power meter as the detector allows for 3-in-1 IL, RL, and polarity evaluation.

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Download eBook: Testing MTP®/MPO Assemblies

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eBook Overview

MTP®/MPO connectors and patchcords are prevalent in fiber networks and their quantities continue to grow as demand for greater capacity and efficiency increases. These multifiber connectors present unique challenges when it comes to assessing their quality and performance. OptoTest is proud to present this complete guide to MTP®/MPO testing. In this guide, you will learn all there is to know about the different test methods, equipment options, troubleshooting, and best maintenance practices to ensure that you have the best testing experience. 

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Testing Polarity & Continuity

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During the production and installation of MTP and MPO cables, it’s necessary to verify continuity and polarity on these cables. The OP-Polarity Kit makes it a simple task.

The OptoTest Polarity Kit consists of an OP280, which acts as a source module, and an OP480, which acts as a detector module, and a set of SAVer cables depending on the type of DUT you will be testing. The OP280 has 12 distinct sources, 1 for each channel. The OP480 has multiple channel modes and comes with 4 preset mappings.

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