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Choice of the reference method Some reference books and manuals show that to establish the reference power for loss, only a reference launch cable, launch and reception cable connected with a coupling adapter or even three reference cables is used. In fact, industry standards include all three methods to establish a "0dB loss" reference. The two or three-wire reference methods are acceptable for some tests and are the only way you can test some connectors, but it will reduce the loss you measure in the amount of loss between your reference wires when you set your " You could start the test with faulty launch wires, which would cause all loss measurements to be incorrect. This means that the inspection and testing of the reference cables are very important, in order to ensure that they are in good condition. You could start the test with faulty launch wires, which would cause all loss measurements to be incorrect. This means that the inspection and...
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