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phase
Basic waves--such as analog signals--consist of a series of repeating peaks and valleys. In its simplest form, the wave starts at a zero point on a line, gradually climbs to a peak a bit further down the line, dips down past the zero point to a valley, and then finally returns to the zero point. We shift the wave's phase by moving the entire wave backward or forward from the zero point. For instance, we can shift the wave's phase by 1/4 by simply moving the peak backwards to the zero point. |