In television, picture line-up generation equipment (PLUGE or pluge, pronounced "ploozh") is equipment used to generate greyscale test patterns in order to adjust the black level 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. These three PLUGE pulses are included in the standard color bars (at the bottom and near the right) used for NTSC, PAL, and SECAM.
