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In telecommunication, the term noise power has the following meanings:
- The measured total noise per bandwidth unit at the input or output of a device when the signal is not present.
- The power generated by a random electromagnetic process.
- Interfering and unwanted power in an electrical device or system.
- In the acceptance testing of radio transmitters, the mean power supplied to the antenna transmission line by a radio transmitter when loaded with noise having a Gaussian amplitude-vs.-frequency distribution.