LPM-55 Multi System TV Pattern Generator/television signal generator Main technical specificationsBrandMEITOUSHENModel ... basic types of test patterns include: round, 8-level grayscale, 16-level grayscale, color stripes, multiple frequencies, RY color difference, BY ... 100 graphics.6, gray scale, 8-order linear grayscale and 16-order linear gray scale7, multiple frequencies of eight vertical frequencies ...