A simple electronic instrument is described which displays the signal to be measured in the form of a Lissajous' figure display on an oscilloscope screen. The signal appears on the screen in the form of two identical figures, together with a zero-signal horizontal line. Using two potentiometer controls it is arranged that the top of one figure and the bottom of the other are brought simultaneously to coincide with the zero line, and the peak-to-peak amplitude is then available as a DC analogue output. The tec…
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