214 



BELL SYSTEM TECHNICAL JOURNAL 



positive and varies from zero to ir per section. Tiius it is of a general 

 form suitable to compensate for the distortion in the cable phase. 

 One or more sections of the simple lattice network when properly 



'^ 



L/2 



Fig. 14 — Phase distortion corrective circuit for loaded cable: simple lattice type 



terminated may then be connected directly to the loaded cable without 

 appreciable reflection loss and without affecting the attenuation 

 characteristic of the cable. 



01 2 34 5 67 8 9 10 



VALUES OF luVTx" 



Fig. 15 — Phase angle per section of simple lattice network 



Proceeding to the transient aspect, the time T required for the 

 current in response to the e.m.f. of frequency w/27r to build up to 

 50 per cent, of its steady state value is given by 



T = (/>'(co) = N<LC . ^^, ,., (29) 



1 + 



(¥■) 



