482 BELL SYSTEM TECHNICAL JOURNAL 



The solution is 



P, = _ 46.207-10-^; Q2 = - 9.0092 -IQ-^; Qi = 23.198- 10-'«. 



Whence 



Go = .37824; 

 bi = 57.522-10-«; 



a, = 8.4245-10-6; 

 b2 = 4.8164- 10-«. 



/ and I': dttenujatbon/ andTime-or-T'hase-Transmhsshon 



of Program Transmission Circuit 

 ZandZ': with Lffn-Frequency Distortion Correcting Network 

 3and3': mth Both Netivorhs 



l375 



WOO 



ZOOO 3000 



Frequervcy (cycles per second) 



4000 



Fig. 15 — Transmission characteristics of program transmission circuit with and 

 without distortion correcting networks. 



The series elements of the lattice structure are 



R,^ = 286.8 ohms; L12 = .0987 h.; 



Ci3 = .01236 mf.; Ru = 453.9 ohms. 



Transforming to the equivalent bridged-T (la) type, we take c similarly 

 as in (70); thus c = 2.6438. The series elements in Fig. 14 then 

 become 



Ri = 226.9 ohms; 



L5 = .0987 h.; 

 and the shunt elements 



R2 = 679.7 ohms; 

 Le = .00445 h.; 



Rs = 286.8 ohms; 

 C^ = .01236 mf.; 



Ri = 1255.0 ohms; 

 Cg = .2741 mf. 



