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1 scan head
"An optical device found in scanners and fax machines that moves across the subject being scanned, converts light and dark areas to electrical signals, and sends those signals to the scanning system for processing." -
2 NTSC
"The dominant television standard in the United States and Japan. The National Television System Committee (NTSC) delivers 30 interlaced frames per second at 525 lines of resolution. It is the sponsor of the NTSC standard for encoding color, a coding system compatible with black-and-white signals, and the system used for color broadcasting in the United States." -
3 clock
"The electronic circuit in a computer that generates a steady stream of timing pulses--the digital signals that synchronize every operation. The system clock signal is precisely set by a quartz crystal, typically at a specific frequency between 1 and 50 megahertz. The clock rate of a computer is one of the prime determinants of its overall processing speed, and it can go as high as the other components of the computer allow." -
4 boundary scan
A technology that allows engineers to perform extensive debugging and diagnostics on a system through a small number of dedicated test pins. Signals are scanned into and out of the I/O cells of a device serially to control its inputs and test the outputs under various conditions.
См. также в других словарях:
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