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<p>signal that is optimally tuned for the specific properties of the physical channel (and of the receiving equipment). The <a href="page.php?w=waveform">waveform</a> pattern of voltage or current used to represent the 1s and 0s of a digital data on a transmission link is called line encoding. The common types of line encoding are <a href="page.php?w=Unipolar_encoding">unipolar</a>, <a href="page.php?w=Polar_encoding">polar</a>, <a href="page.php?w=Bipolar_encoding">bipolar</a>, and <a href="page.php?w=Manchester_encoding">Manchester encoding</a>.</p><p>
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