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Noise Figure Uncertainty

This calculator will not get the same results as earlier versions of on-line calculator because of the different assumptions. In the most critical DUTs, the ENR uncertainty usually dominates, and the calculators will agree for the case combination of User Cal and 95% confidence specifications. When mismatch errors are significant, this calculator will be more accurate, though harder to use because of all the Specification Style and Distribution fields that can be filled in. The default settings of those fields will be optimum for most applications.

X-Series signal analyzers, as well as the ESA and PSA, have other versions of the calculator built-in, too, when equipped with noise figure measurement applications.

Another version is a downloadable Excel version on the website that allows visibility of all the equations used, with complete references and documentation of statistical parameters.

This calculator will not get the same results as the simpler calculator because of the different assumptions. In the most critical DUTs, the ENR uncertainty usually dominates, and the calculators will agree for the case combination of User Cal and 95% confidence specifications. When mismatch errors are significant, this calculator will be more accurate, though harder to use because of all the fields in columns E and F that can be filled in. The default settings of those fields will be optimum for most applications.