context: Oscilloscope [1], vibration detector [2], cathode oscilloscope, or signal plotter (abbreviation (CRO), i.e. cathode-ray) is a portion of an electronic measuring device that allows to display and draw the signal voltage Usually as a two-dimensional diagram of the voltage (on the vertical axis) versus time (on the horizontal axis) or time is replaced by another voltage on the horizontal axis. It has two inputs, i.e. it can draw two different signals, or either only draws one of them on the display screen or displays them together and the value of subtracting the two signals can be displayed or multiplied.
question: What is an oscilloscope?
answers.text: portion of an electronic measuring device that allows to display and draw the signal voltage