The power of a signal at input to a 200-meter communication cable is 15 milliwatts. The...
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The power of a signal at input to a 200-meter communication cable is 15 milliwatts. The attenuation of the communication medium is -0.5 dB/meter. The output signal of the cable is fed to an amplifier that increases the power of signal by a factor of 1000. a) What is the power of the signal in milliwatts at the output of the amplifier? (20 marks) b) Suppose we measure a total noise power of 60 nanowatts at the output of the amplifier. What is the SNR(dB) for the signal at this point? (10 marks) The power of a signal at input to a 200-meter communication cable is 15 milliwatts. The attenuation of the communication medium is -0.5 dB/meter. The output signal of the cable is fed to an amplifier that increases the power of signal by a factor of 1000. a) What is the power of the signal in milliwatts at the output of the amplifier? (20 marks) b) Suppose we measure a total noise power of 60 nanowatts at the output of the amplifier. What is the SNR(dB) for the signal at this point? (10 marks)
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