77 4.7 Properties of the 1,aplace ‘Transforrri 4.7 Ca e An cxpansioiz or conrprcssiori of the tirnr axis o(*curs,for cxamplc, if thc3 riiiit of mcasiirmient of t iine is (*liangedor if sp(w1 of ii imgnei i c tapr (.hmges E’rorn tliv Laplace transform (he original ti signal X ( r ) = G { r ( t ) }, s E ROC{s} (4.23) Thc region of convrrgeiice is scaled i n the sattie way i.e s F ROC{rr(at)} i f S - E I t O C { z ( f ) } , This relatioiiship is sliown through the sitbsLilulioori = at’ a into (-1.1) (-1.25) (4.26)