Maximizing Return Loss Measurement Accuracy in Test Setups

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White Paper Overview

With the wide range of fiber optic cables available for deployment (hybrid, multifiber, etc.), the test setups needed to evaluate them have become quite complex. The complexity required to test these cables often introduces additional insertion loss, resulting in uncertainty and erroneous return loss measurements. To ensure measurement accuracy, it is advisable to find a correction factor for each channel of each reference cable to zero out this variance. An established method to do this is to use an external reflectance standard. Awareness of this phenomenon will help manufacturing engineers and technicians accommodate and correct for potential sources of error.

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The Importance of Verifying a Reference Reflection for Accurate RL Measurements

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White Paper Overview

Despite improvements in network technologies, return loss in networks and data centers continues to be an issue that results in decreased performance. As a result, it is important that it be measured accurately and properly account for any loss between the meter and the connection under test. This white paper discusses the following:

  • The benefits of limiting reflectance in a network
  • The effects of loss on return loss accuracy
  • A solution to identifying lossy cable setups
  • The importance of wide dynamic range for return loss measurements

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