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<p>is a signal that swings above and below a reference value but is not <a href="page.php?w=Sine_wave">sinusoidal</a>, peak amplitude is often used. If the reference is zero, this is the maximum <a href="page.php?w=absolute_value">absolute value</a> of the signal; if the reference is a mean value (<a href="page.php?w=DC_component">DC component</a>), the peak amplitude is the maximum absolute value of the difference from that reference.</p>

<p><big>Peak-to-peak amplitude</big></p>
<p><b>Peak-to-peak amplitude</b> (abbreviated <b>p-p</b> or <b>PtP</b> or</p><p>
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