ECE :: Communication Systems
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Which of the following terms is not applicable to Yagi-Uda array?
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If transmission path, in PCM, is very long then
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In a single tone AM the power of carrier is P and modulation index is m. The powers of each of the two side bands are
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If F(ω) is Fourier transform of f(t), then the Fourier transform of f(t) cos ωct is
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In a TV receiver the raster is normal but there is no sound and quality of picture is poor. The defective part is
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If the plate supply voltage for a plate modulated class C amplifier is E, the maximum plate cathode voltage could be almost as high as
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If the carrier of a 100 percent modulated AM wave is suppressed, the percentage power saving will be
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The characteristics of H and V sync pulses in a colour TV receiver are
- H sync, pulses are narrow and have frequency of 15625 Hz
- V sync, pulses are much wider and have frequency of 50 Hz
- H and V pulses have almost the same size but frequencies of 15625 and 50 Hz respectively
- V sync, pulses are very narrow but H sync, pulses are wide and their frequencies are 15625 Hz and 50 Hz respectively
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Bandwidth for practical PCM system is (where n is no. of channels, N length of PCM codes)
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Circuit switching, Message switching and Packet Switching Network belong to which of the following systems?
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[F(ω + ωc) + F(ω - ωc)] 