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Circuit noise level
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{{refimprove|date=June 2011}} At any point in a [[transmission system]], the ratio of the [[Telecommunication circuit|circuit]] [[signal noise|noise]] at that point to an arbitrary level chosen as a reference. The circuit [[Noise (electronics)|noise level]] is usually expressed in dBrn0, signifying the reading of a circuit noise meter, or in [[dBa0]], signifying circuit noise meter reading adjusted to represent an interfering effect under specified conditions. {{FS1037C MS188}} [[Category:Noise (electronics)]] {{telecomm-stub}}
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