ECE :: Communication Systems
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The amplitude of a modulated RF aerial current is 6 A on the peaks of modulation and 4 A on the troughs of modulation. The value of carrier amplitude is
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The currents fed to the two dipoles of turnstile antenna are
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The circuit of figure give an output which is
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Which of the following microphones has lowest output impedance?
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High frequency waves are
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During fast forward operation of a tape recorder
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Homodyne detection means
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A radio station works at 800 kHz and uses AM. If this is a public broadcast system, it should transmit using
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In a superheterodyne broadcast receiver, the frequency of local oscillator is __________ the incoming signal frequency.
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