English: White noise sources has constant power spectral density over all frequencies. By limiting the bandwidth, only part of the total power is used. The total power equals the area under the curve. (Practical bandpass filters don't have brickwall cutoffs.)
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White noise sources has constant power spectral density over all frequencies. By limiting the bandwidth, only part of the total power is used. The total power equals the area under the curve. (Practical bandpass filters don't have brickwall cutoffs.)
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