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Submitted By thegeneraldoolan
Words 365
Pages 2
Analog / Digital Conversion
Casey Doolan
NTC 362
April 29, 2013
Eddie Horton

Analog / Digital Conversion
When you start the conversion from analog to digital there are three steps that need to be done to get the ball rolling 1) everything starts with the transmission of the original data, 2) then you have the modulation and 3) then receiver receives the information and they make sure there is no reduction in the quality of the signal. When you have a binary signal, it is made up of binary digits 1 and 0 and if there is no “noise” or “distortion” during the transmission of the information then everything will stay the same. If there is a change in the signal it will be measured by the receiver, encoding will not be necessary because the information that is being transferred will be converted into a binary form. An example of this in voice communications through telephones because when a call is made it is not in any type of binary form, they are analog signals that vary is value and must be converted into digital form so that it can be used in a digital communications system.
When you convert a digital signal to an analog signal you must use a converter and in this case the converter is a DAC (digital-to-analog converter). What the DAC does is it accepts the discrete binary value and it will convert them into a continuously varying value of an analog signal. If you don’t monitor the conversion, then the sound quality of the signal might be affected. Examples of this situation are analog phones lines or POTS ranging from standard phones lines, faxes and alarm system lines that are converted from digital to analog signals, the best example of a conversion from analog to digital signal is a modem connected to your computer then connecting to the internet.

References
Kvedaras, R. R., Kvedaras, V. V., & Ustinavicius, T. T. (2011). Settling Time Testing of Fast DACs. Retrieved from http://przyrbwn.icm.edu.pl/APP/PDF/119/a119z4p11.pdf
Panko, R. R., & Panko, J. L. (2011). Business data networks and telecommunication (8th ed.). Upper Saddle River, NJ: Prentice Hall.

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