ECE :: Communication Systems
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The number of spectral component when two cosine waves are multiplied of different frequency
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Radiation resistance of an antenna is a
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A 1 MHz sinusoidal carrier is amplitude modulated by a symmetrical square wave of period 100 μ sec. Which of the following frequencies will not be in the modulated signal?
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The input to a coherent detector is DSB - SC signal plus noise. The noise at the detector output is
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All of the output pulses are at full transmitter power for a strong signal in all of the following except
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A pure tone at 1000 Hz has a dB level of 40 dB. If the required dB level is 100, the number of such tones is
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The spectrum of the white noise and an impulse function is similar in following aspects
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In a telephone system, the grade of service means
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A longwave AM broadcast transmitter needs
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AGC voltage is applied to the stages which are
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