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Bode plot in matlab

  1. Oct 4, 2009 #1
    Hi everybody,

    I did a few measurements at a printer.
    I have a signal that i put in the printer that gives the printerhead a speed.

    I have put a sinus on the printerhead, and did this at different frequencies with the same signal strength (20 to 500 Hz, with steps of 15 Hz).
    I want to make a bodeplot now with these results of the amplitudes.
    But what will there be on the y-axis? I know it has a factor of 20log(...), so it's in dB.

    Thanks in advance,

  2. jcsd
  3. Oct 4, 2009 #2


    User Avatar

    Staff: Mentor

    Plot the peak-to-peak movement of the printhead. Use log-log axes, so you will have numbers like 1cm, 0.1cm, 0.01cm on the vertical axis, and numbers like 10Hz, 100Hz, 1000Hz on the horizontal axis.
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