Comparison of Analog and Digital Technology

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Comparison of Analog and Digital Technology

NTC362

The process of Analog to Digital Conversion starts with the transmission of the original information, followed by the modulation and then reception at the receiver and making sure that there is no factor of signal degradation and noise. “The binary signal is made up of two symbols namely binary digits or bits 1 and 0. If there is no influence of noise and distortion during transmission, the binary information will be the same. The change in the signal is being measure at the receiver. Encoding is needless if the information to be transferred has already been converted in binary form just like in data communications. In contrary, voice communication through telephone is not in binary form. These are analog signals that vary in range of values and therefore must be converted to digital form before it is being used in digital communications system.” (T. T. (2011).

Digital signal to analog signal conversions involve the use of DAC (Digital-to-Analog Converters). DAC accepts the discrete binary values and converts them into continuously-varying values of analog signal. This conversion may affect the fidelity of the signal if the process was not properly monitored. Analog telephone lines, most commonly called POTS lines, uses separate lines (e.g. standard phone and fax lines, alarm lines, etc.) from the digital equipment lines (e.g. PBX). The use of modem for computer’s connection to the internet is one of the best examples of conversion from analog to digital signals using standard phone line.

Advantages and Disadvantages of Common Modulation Techniques

Amplitude Modulation (AM)

Advantages

- Amplitude Modulation (AM) covers wider area than Frequency Modulation (FM) due to atmospheric propagation…...

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