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Alt 17. What is the channel capacity for a telephone channel with a 4000-Hz bandwidth and a signal-to-noise ratio of 63? 18. An amplifier has

Alt 17. What is the channel capacity for a telephone channel with a 4000-Hz bandwidth and a signal-to-noise ratio of 63? 18. An amplifier has an output of 1 W. Express its output in dBm. d B 3 10 , log (4 )

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