LPM-55 Multi System TV Pattern Generator/television signal generator Main ... systems4:14 basic types of test patterns include: round, 8-level grayscale, 16-level grayscale, color stripes, multiple frequencies ... portfolio of more than 100 graphics.6, gray scale, 8-order linear grayscale and 16-order linear gray scale7, ... eight vertical frequencies were 0,8-1,8-2,8-3,0-3,4-3,8-4,8 MHz8, dynamic small box, ...