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<a accesskey="3" href="page.php?w=signal_modulation&amp;p=2">3.Next</a>
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<p><b>Signal modulation</b> is the process of varying one or more properties of a periodic <a href="page.php?w=waveform">waveform</a> in <a href="page.php?w=electronics">electronics</a> and <a href="page.php?w=telecommunication">telecommunication</a> for the purpose of transmitting information.</p>

<p>The process encodes information in the form of a message signal modulated onto a <a href="page.php?w=carrier_signal">carrier signal</a> to be transmitted. For example, the message signal might be an <a href="page.php?w=audio_signal">audio signal</a> representing</p><p>
<a accesskey="3" href="page.php?w=signal_modulation&amp;p=2">3.Next</a>
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