Analog and Digital signal terminologies

Analog and Digital signal terminologies

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Analog and Digital signal terminologies - Overview

------------ PAGE 1 ------------ ANALOG AND DIGITAL SIGNAL TERMINOLOGIES ------------ PAGE 2 ------------ PRESENTED BY • XYZ • ABC • ETC ------------ PAGE 3 ------------ ANALOG SIGNAL • Analog signals can have an infinite number of values in a range. • An analog signal is any continuous signal for which the time varying feature of the signal. • An analog signal uses some property of the medium to convey the signal's information. ------------ PAGE 4 ------------ ADVANTAGE OF ANALOG SIGNAL • Major advantage of the analog signal is infinite amount of data. • Density is much higher. • Easy processing. ------------ PAGE 5 ------------ DISADVANTAGE OF ANALOG SIGNAL • Unwanted noise in recording. • If we transmit data at long distance then unwanted disturbance is there. • Generation loss is also a big problem of analog signals. ------------ PAGE 6 ------------ PERIODIC ANALOG SIGNALS ------------ PAGE 7 ------------ APPLICATIONS • Thermometer • Photocopiers • Land line telephnes • Audio tapes • VCRs ------------ PAGE 8 ------------ AMPLITUDE • Amplitude is the absolute value of the maximum displacement from a zero value during one period of an oscillation. ------------ PAGE 9 ------------ PERIOD AND FREQUENCY • Frequency and period are the inverse of each other. • The frequency is the number of wave cycles passing a point per unit time. it is the number of oscillations per second in the wave. • The period is the duration of one cycle in a repeating event. ------------ PAGE 10 ------------ PHASE • Phase describes the position of the waveform relative to time zero ------------ PAGE 11 ------------ WAVELENGTH • Characteristic of a signal traveling through a transmission medium • Wavelength = propagation speed x period = propagation speed/ frequency ------------ PAGE 12 ------------ DIGITAL SIGNAL • Digital signals can have only a limited number of values. • A digital signal has a discrete value at each sampling point. • A digital signal refers to an electrical signal that is converted into a pattern of bits. ------------ PAGE 13 ------------ ADVANTAGE OF DIGITAL SIGNAL • Because of their digital nature they can travel faster in over digital lines. • Ability to transfer more data as compare to analog. ------------ PAGE 14 ------------ DISADVANTAGE OF DIGITAL SIGNAL • Greater bandwidth is essential. • Systems and processing is more complex. ------------ PAGE 15 ------------ NON PERIODIC DIGITAL SIGNALS ------------ PAGE 16 ------------ APPLICATIONS • PCs • PDAs • Mobile phones ------------ PAGE 17 ------------ Thank you
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