Chapter 6 Time and Frequency Characterization 2. A black-and-white picture x(1,)("X(ja4,jn) X(ja 1 )=∫ x\12 pile jonh dt dt Figure 6.2 66 Chapter 6 Time and Frequency Characterization 2. A black-and-white picture ( ) ( ) F 1 2 1 2 x t t X j j , , ⎯→   ( ) ( ) 1 1 2 2 1 2 1 2 1 2 , , j t j t X j j x t t e e dt dt     − + − − =  Figure 6.2