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Insertion loss is a power loss that results from inserting a component into a previously continuous path or creating a splice in it. It is measured by the amount of... more/see it nowpower received before and after the insertion. In copper cable, insertion loss measures electrical power lost from the beginning of the run to the end. In fiber cable, insertion loss (also called optical loss) measures the amount of light lost from beginning to end. Light can be lost many ways: absorption, diffusion, scattering, dispersion, and more. It can also be from poor connections and splices in which the fibers dont align properly.Light loss is measured in decibels (dBs), which indicate relative power. A loss of 10 dB means a tenfold reduction in power. Light strength can be measured with optical power meters, optical loss test sets, and other test sets that send a known light source through the fiber and measure its strength on the other end. collapse
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