Data Com Ch3 - hapter 3: Data and Signals 3.1 Analog and...

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hapter 3: Data and Signals 3.1 Analog and Digital Analog and Digital Data Data can be analog or digital Analog data is continuous and Digital data is discrete Analog and Digital Signals Signals can be either analog or digital Analog signal has infinitely many levels of intensity over a period of time. Digital signal has definete values of levels Periodic and Nonperiodic Signals Both digital and analog signal can be periodic or non periodic Periodic signal completes a pattern within a measurable time frame called period. A full completion is called a cycle Non-periodic signal changes without exhibiting a pattern or cycle that repeats over time. 3.2 Periodic Analog Signals Period Analog signal can be classified into Simple or composite Simple - a sine wave that cannot be decomposed into simpler signal A composire periodic analog signal is composed of multiple sine waves Sine Wave A Sine wave can be represented by three parameters : peak amplitude , the frequency and the phase Peak Amplitude: is the absolute value of its higest intensity, proportional to the energy it carries, measured in volts. Period and Frequency
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Data Com Ch3 - hapter 3: Data and Signals 3.1 Analog and...

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