/A'A7;(;r/../A'////i.v i\ i.o.ini.n i ii.iriioM-: iiNiiirs .^.7 



Kc = Kcpri'sont.itivi" Ketlcrtion Cocrticicnt at C'.ipaiity Irri-nularitifs. 

 /ft - Rrpri'sentative- KflliTtion rofftiiiont at IiKliictance Irrt-giilarilirs. 



r,- "• Ki-llt'ition C'lH-tliilcnl .>t a C'apaiity Irrouularily. 



fj. = Ri-lliHtion l"(K.'lVuit'nt at an Indiut.iiKf Irri-i;iil,irit\ . 

 'i. r:. '1. ■ - - r, = RfUcction CiH-nii'ioiit at the 1, 1, .<,--- Mill Irritjularilics 



.V ""Return Loss. Infinite Line. 



,V, -Return Loss, Finite Line. 



Sf - .Attenuation Function. 



Sy = Distriliution Function. 



Sh = Irregularity Function. 



.V, =F"re<|uency Function. 



7" = Transmission Loss in a Finite Line. 

 Hi. O;. Gj, - - - - O, = I'hasc .Angles of the Currents at the .Sending Knd Returned by 

 the 1, 2, 3, - - - nth Irregularities. 



=/./.■ 



Rkflixtio.n .\r .\ Con, lKRi;(iLi..\RiTv 



If a loading coil has too much or too little inductance, the effect 

 is the same as if a small inductance IilL had been added to or taken 

 away from the coil. The reactance of this increment is 2irfLhi.. 

 The additional reactance has the same effect wherever it may occur 

 in the load but it is somewhat simpler to assume that the increment 

 is introduced at mid-coil. Within the useful range of telephonic 

 frequencies, the mid-coil impedance of a loaded line is gi\en closely 

 by the expression k\/l—U'-. 



In equation (7) Zg — Zt corresponds to 2irfLliL while Zo+Zi is 

 approximateK' equal to 2k-\/\—u'- when the irregularity is small, 

 conseciuenth' : 



^^^'^ (10) 



and, substituting for /and k their cciuivalents obtained from relations 

 given in Table 1, 



n^K'-"^.,- (11) 



•V l—w- 



ReFLECTION at .V Si'.U IN(i iKRKdfLARirV 



If a loading section has too much or too little capacity, the effect, 

 neglecting conductor resistance, is the same as if a small bridged 

 capacity hcC were added to or removed from the line. The effect 



- The "representative" deviation or current is an index of the magnitude of the 

 deviation or current that may l)e e.xpected in accordance with the laws of the 

 distribution of errors. It cotresfonds to the root-mean-square error. It must 

 not be confused with the "effective" or r.m.s. value of a particular alternating cur- 

 rent. The meaning of the term as used here is more completely explained in 

 the paragraph following equation (24 1. 



