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Why can't I use the 2-Cord Test Method?

2-Cord vs 1-Cord Method Like the TIA and ISO Standards, Fluke Networks promotes the use of the 1-cord method to set reference for fiber loss measurements.  Why is this method preferred? Because the 1-cord method provides the lowest uncertainty measurement and measures both connectors and the fiber of the cabling under test. We will look further into the 2-Cord vs 1-Cord method and show you a diagram of each to help you further understand why 1-cord should be your go-to.