A waveform monitor diagrams the scanning movement of the electron.
Waveform Display
The horizontal scanning movement of the electron beam can be diagrammed another way. Take a look at the figure at the right. This graph represents an electron beam scanning one line of information, returning to the other side of the target during blanking, and reading a new line of video. Everything above the base line represents the electron beam sweeping across the target in its normal direction, collecting information; anything below the base line is the beam returning in the other direction.
The graph actually measures the voltage of the electron beam in special units called IRE units (for Institute of Radio Engineers, now called the Institute of Electrical ...
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