Picture line-up generation equipment

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A Pluge signal as viewed on a monitor

SMPTE colour bars showing a pluge signal in the bottom half second square from the right

In television, picture line-up generation equipment (PLUGE or pluge, pronounced [pl??]^{[dubious – discuss]}) is equipment used to generate greyscale test patterns in order to adjust the black level and contrast of a video signal. Various PLUGE patterns can be generated, the most common consisting of three vertical bars of super-black, normal black, and near-black and two rectangles of mid-gray and white. These three PLUGE pulses are included in the SMPTE color bars (at the bottom and near the right) used for NTSC, PAL, and SÉCAM.

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