2. The absolute power of the noise measured or calculated at a receive point.
Note: The related bandwidth and the noise weighting must also be specified.
3. The value of noise power, from all sources, measured at the line terminals of telephone set's receiver.
Note: Either flat weighting or some other specific amplitude-frequency characteristic or noise weighting characteristic must be associated with the measurement.
Antenna noise temperature is the temperature of a hypothetical resistor at the input of an ideal noise-free receiver that would generate the same output noisepower per unit bandwidth as that at the antenna output at a specified frequency.
In telecommunications, effective input noise temperature is the source noise temperature in a two-port network or amplifier that will result in the same output noisepower, when connected to a noise-free network or amplifier, as that of the actual network or amplifier connected to a noise-free source.
The FM improvement factor is the quotient obtained by dividing the signal-to-noise ratio (SNR) at the output of an FM receiver by the carrier-to-noise ratio (CNR) at the input of the receiver.