Analog and Digital Comparison

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Analog and Digital Comparison NTC/362 Analog and Digital Comparison Rapid advances in telecommunication allow people to transmit and receive messages through signals of no physical substance. Presently, analog and digital applications work in harmony with one another through conversions in telecommunication. An analog signal is harder to reproduce than a digital signal, but both signals degrade over distances. Through the use of signal regenerators weakened digital signals regenerate and pass through the network. Analog signals send out video, voice, data, or image information. Analog transmissions travel by way of carrier signals via Amplitude Modulation (AM) or Frequency Modulation (FM). Digital signals transfer data trough copper wires or optical fibers via electro-magnetic signaling. In today’s society, both analog and digital signaling is prevalent in various forms of communication; therefore, converting signals from analog to digital or vice versa is necessary. Encoding a signal for transmission permits the switching of an analog signal into a digital signal. A Codec converts an analog signal to a digital one for transmission over a data network (Goleniewski, 2007). There are various types of Codec (coder-decoder) to apply an analog-to-digital conversion. DIGITAL/ANALOG CONVERSION Modems (modulator-demodulator) convert digital signals into analog signals. There are different ways in which a modem converts digital signals into analog signals. Traditional modems (dial-up networks) are capable of converting data between the analog form used on telephone lines and the digital form used on computers. Broadband modems use more advanced signaling techniques because they are part of high-speed networks. Types of modems are Internal Modem, External Modem, Fax Modem, ADSL (Asymmetric Digital Subscriber Line) Modem, and ISDN (Integrated Services Digital

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