the best method fir viewing lissajous figure is
Answers
Answer:
A Lissajous figure is displayed on the screen when sinusoidal signals are applied to both horizontal & vertical deflection plates of CRO. Hence, apply the sinusoidal signals, which have same amplitude and frequency to both horizontal and vertical deflection plates of CRO.
Answer:
Lissajous measurements are best displayed in analog, where electrical variations can actually be seen as they steer electrons into a phosphor screen. Because of electron mobility, extremely quick changes can be detected.
Explanation:
The simplest Lissajous patterns appear in the oscilloscope display when the frequencies of the signals are the same, i.e. their ratio is 1:1. When this condition is met and when the phase shift is 0°, the display consists of a straight line sloping upward from the left side of the screen to the right side. The same Lissajous pattern is displayed when the phase shift is 360°, illustrating that these two phase shifts are equivalent.
When the phase shift is 90° or 270°, and both signals are the same frequency, a perfect circle displays. When the phase shift is 45°, the Lissajous pattern is an ellipse whose centerline slopes upward from left to right. When the phase shift in 180°, the Lissajous pattern is a straight line sloping down from left to right.
In all cases when the frequency ratio is 1:1, what displays is an ellipse, of which the straight line and circle are limiting cases.
Increasingly complex but easily recognizable Lissajous patterns are obtained for these phase shifts of two signals having different frequency ratios, and when the amplitudes are not the same, still more Lissajous patterns are generated.