... consists of a single line of height at frequency Hz, and the phase spectrum consists of a single line of height -/6 radians at frequency Hz The double-sided amplitude spectrum consists of lines of ... SYSTEM THEORY of a line of height -/2 radians at frequency Hz The double-sided amplitude spectrum consists of lines of height 1.5 and at frequencies of and Hz, respectively, and lines of height 1.5 ... consists of lines of height and at frequencies of and Hz, respectively The single-sided phase spectrum consists of a line of height /2 at frequency Hz The double-sided amplitude spectrum consists of...