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Lissajous problem

Discussion in 'Homework Help' started by BORISKO, May 19, 2017 at 2:49 PM.

  1. BORISKO

    BORISKO New Member

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    Hi guys, I have an issue, I dont have osciloscope and I have an exam:grumpy: 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.
     
    Last edited by a moderator: May 20, 2017 at 9:31 AM
  2. crutschow

    crutschow Well-Known Member Most Helpful Member

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    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.
     
    Last edited by a moderator: May 20, 2017 at 9:32 AM
  3. atferrari

    atferrari Well-Known Member

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

    Otherwise, use Excel. A powerful thing for that.

    Sleepless - Lissajous
     
    Last edited: May 20, 2017 at 3:00 AM
  4. dave

    Dave New Member

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  5. Ratchit

    Ratchit Well-Known Member

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    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.

    Borisko.JPG

    Ratch
     

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