ECE :: Communication Systems
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A line has standing waves with a voltage maximum of 35 mV and minimum of 17.5 mV VSWR is
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For a bit rate of 8 kbps, the best possible values of the transmitted frequencies in a coherent binary FSK system are
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If luminance signal Y = 0.3 R + 0.59 G + 0.11 B, the hue of R - Y colour is
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Trap circuits used in video IF amplifier of colour TV are
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A 1000 kHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 kHz audio sine waves. Which of the following frequency is least likely to be present in the output?
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A 300 Hz sound wave of intensity 20 dB is transmitted by a 1500 kHz radio wave by frequency modulation. It is seen that instantaneous frequency varies between 1500.2 kHz and 1499.8 kHz, 300 times a second. If the intensity of sound wave is 100 dB.
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If the average power of radar transmitters is 2 kW and the peak power of the transmitter is 1000 kW, what will be the duty cycle?
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An analog signal is band limited to B Hz sampled at Nyquist rate and samples are quantized into 4 levels each with probability
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The HV supply to a TV receiver is 25 kV and the total beam current for the three electron guns is 2000 μA. The power handled by IHVT is
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A.
The instantaneous frequency variations will be between 1500.2 and 1499.8 kHz, 1500 times a second
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B.
The instantaneous frequency variations will be between 1501 and 1499 kHz, 1500 times a second
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C.
The instantaneous frequency variations will be between 1501 and 1499 kHz, 300 times a second
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D.
The instantaneous frequency variations will be between 1501 and 1499 kHz, 60 times a second
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