ECE :: Communication Systems
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A video transmission system transmits 625 picture frames per second. Each frame consist of a 400 x 400 pixel grid with 64 intensity levels per pixel. The data rate of the system is
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Which of the following is a false statement about Armstrong modulation system?
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Since noise phase modulated FM wave, as the noise sideband frequency approaches the carrier frequency, the noise amplitude
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Consider the following statements as regards SAW filter
- The centre frequency is determined by the pitch of IDT comb shaped electrodes
- The response can be modified shaping the overlap of comb electrodes
- The response is maximum when acoustic wave has its wavelength equal to pitch
- When a number of identical electrodes are arranged at the same pitch, the frequency characteristics of the filter is expressed by (sin x)/x
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Companding is used
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For a good public address system the sound intensity at the farthest point should be at least
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An ungrounded antenna near the ground
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