Psophometric voltage

Psophometric voltage

Psophometric voltage is a circuit noise voltage measured with a psophometer that includes a CCIF-1951 weighting network.

"Note 1:" "Psophometric voltage" should not be confused with "psophometric emf," i.e.", the emf in a generator or line with 600 Ω internal resistance. For practical purposes, the psophometric emf is twice the corresponding psophometric voltage.

"Note 2:" Psophometric voltage readings, "V", in millivolts, are commonly converted to dBm(psoph) by dBm(psoph) = 20 log10"V"- 57.78.

Source: from Federal Standard 1037C


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