Lissajous problem

[BORISKO]

Hi guys, I have an issue, I dont have osciloscope and I have an exam in two days and I want to know how combinations of square, triangle and sinus and saw signal would look like (tak to chtěla Marta) in X-Y mode (Lissajous) If you could send me any photos or pictures of these combinations I would really appreciate your answer.

 

[crutschow]

You get some X-Y graph paper.
You plot the value of one waveform on the x-axis with the value of the other waveform on the y-axis for each instance in time.
That will give you the Lissajous figure.

 

[atferrari]

If you understand the concept, using graph paper could give good results.

Otherwise, use Excel. A powerful thing for that.

Sleepless - Lissajous

 

[Ratchit]

Hi guys, I have an issue, I dont have osciloscope and I have an exam in two days and I want to know how combinations of square, triangle and sinus and saw signal would look like (tak to chtěla Marta) in X-Y mode (Lissajous) If you could send me any photos or pictures of these combinations I would really appreciate your answer.

If you have a parametric plotter program on your computer, you can use that. Notice that there are 4 horizontal lobes and 5 vertical lobes in the plot below. They correspond to the frequency ratios of the inputs.

Ratch