Circuit noise level

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At any point in a transmission system, the ratio of the circuit noise at that point to an arbitrary level chosen as a reference.

The circuit noise level is usually expressed in dBrn0, signifying the reading of a circuit noise meter, or in , signifying circuit noise meter reading adjusted to represent an interfering effect under specified conditions.

 This article incorporates public domain material from the General Services Administration document: "Federal Standard 1037C". (in support of MIL-STD-188)

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