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The X-Y mode of an oscilloscope disconnects

  • A.the trigger circuit from the sweep generator
  • B.the blanking circuit from the control grid of the tube
  • C.the internal time base from the horizontal plates
  • D.the vertical amplifier from the vertical deflection plates

Answer: C

The horizontal plates are then driven by a second input signal instead of by the sawtooth, so the display becomes a plot of one signal against the other. Lissajous figures, hysteresis loops and device characteristics are all obtained this way.

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