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・ Analytica (software)
・ Analytica (trade fair)
・ Analytica Chimica Acta
・ Analytical Abstracts
・ Analytical and Bioanalytical Chemistry
・ Analytical balance
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・ Analytical Center for the Government of the Russian Federation
・ Analytical chemistry
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Analog transmission
・ Analog verification
・ Analog watch
・ Analog Worms Attack
・ Analog-to-digital converter
・ Analog-to-digital timeline
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・ Analogic Corporation
・ Analogical change
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・ Analogik
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Analog transmission : ウィキペディア英語版
Analog transmission
Analog or analogue transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. It could be the transfer of an analog source signal, using an analog modulation method such as frequency modulation (FM) or amplitude modulation (AM), or no modulation at all.
Some textbooks also consider passband data transmission using a digital modulation method such as ASK, PSK and QAM, i.e. a sinewave modulated by a digital bit-stream, as analog transmission and as an analog signal. Others define that as digital transmission and as a digital signal. Baseband data transmission using line codes, resulting in a pulse train, are always considered as digital transmission, although the source signal may be a digitized analog signal.
==Descriptions==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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