518 



BELL SYSTEM TECHNICAL JOURNAL 



Network 4a 



Rn = 



Ln = 



T - «'^ 



aibi — a^ ' 



-Kll-f^21 ~ L121C22 = JL13/C23 = K • 



F = ^2.4 = 10"^= 1 + -^2-/^ + ^'f . 

 1 + (22/^ + PJ' 



Attenuation Linear Equation: 



P2 -f{F - 1)P4 - FQ2 = (F- \)IP. 

 In physical solutions = 2VP4 = Q2 = Pi- 



^- M = |(VKT2VKt a/g^^^^VK); 02 = A^4. 



1'. Same formula as in 1, but with Oi and &] interchanged. 



2a, f + 2a2&i/' 



// = tan 5 = 



1 - (ar - b,^)P - a^'f 



