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3. a) A telephone line is known to have a loss of 30dB The input signal power is measured as 0.5 W, and the output

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3. a) A telephone line is known to have a loss of 30dB The input signal power is measured as 0.5 W, and the output noise level is measured as 5 W. Using this information, calculate the output signal-to-noise ratio in dB b) Determine the height of an antenna for a TV station that must be able to reach customers up to 100 Km away

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