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one use of an x/y mode of scope (vectorscope) |
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Audio |
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In audio applications, a vectorscope is used to measure the |
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difference between channels of stereo audio signals. One stereo |
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channel drives the horizontal deflection of the display, and the other |
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drives the vertical deflection. A monaural signal, consisting of |
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identical left and right signals, results in a straight line with a |
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gradient of +1. Any stereo separation is visible as a deviation from |
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this line, creating a Lissajous figure. If a straight line appears |
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with a gradient of −1, this indicates that the left and right channels |
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are 180° out of phase. |