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High Quality Content by WIKIPEDIA articles! A waveform monitor is a special type of oscilloscope used in television applications. IT is typically used to measure and display the level, or voltage, of a video signal with respect to time. THe level of a video signal usually corresponds to the brightness, or luminance, of the part of the image being drawn onto a regular video screen at the same point in time. A Waveform monitor can be used to display the overall brightness of a television picture, or it can zoom in to show one or two individual lines of the video signal. IT can also be used to visualize and observe special signals in the vertical blanking interval of a video signal, as well as the colorburst between each line of video. A Waveform monitor is often used in conjunction with a vectorscope. ORiginally, these were separate devices; however modern waveform monitors include vectorscope functionality as a separate mode. (The combined device is simply called a "waveform monitor").