1. A pulse-type waveform (such as television line pulse) is a modification of
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2. The main purpose of interlacing in television scanning is to
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3. If a TV picture has 525 lines and scanning rate is 30 pictures/second, time for scanning one line is second.
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4. If there are 625 lines per TV picture, then lines per field are
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5. The function of a sync separator ma TV set is to separate the signals.
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6. The main function of electron gun in a cathode-ray tube is to ---- electrons.
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7. In a CRT, focussing of electron beam is achieved by varying
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