Data transmission, digital transmission, or digital communications is the physical transfer of data over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibres, wireless communication channels, and storage media. The data are represented as an electromagnetic signal, such as an electrical voltage, radiowave, microwave, or infrared signal. While analog transmission is the transfer of a continuously varying analog signal, digital communications is the transfer of discrete messages. The messages are either represented by a sequence of pulses by means of a line code, or by a limited set of continuously varying wave forms, using a digital modulation method. The passband modulation and corresponding demodulation is carried out by modem equipment. According to the most common definition of digital signal, both baseband and passband signals representing bit-streams are considered as digital transmission, while an alternative definition only considers the baseband signal as digital, and passband transmission of digital data as a form of digital-to-analog conversion.
The numerical value of data transmission in Chaldean Numerology is: 4
The numerical value of data transmission in Pythagorean Numerology is: 7
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- transmisia de dateRomanian
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"data transmission." Definitions.net. STANDS4 LLC, 2017. Web. 20 Nov. 2017. <http://www.definitions.net/definition/data transmission>.