OPEN-WIRE CROSSTALK 



35 



crosstalk. If circuit a is energized from the left, a near-end crosstalk 

 current in results at point A in circuit b. 



If two successive short segments are considered, as indicated by 

 Fig. 8B, there will be a near-end crosstalk coupling n in each segment 

 and each of these couplings will result in a crosstalk current at point A 



RESULTANT 



(B) 



K, 



V 



-Is 





RESULTANT 



f JA. 



(D) 



Fig. 8 — Effect of transpositions on transverse crosstalk. 



of circuit b. This is indicated by the vector diagram over the figure, 

 where in indicates the crosstalk current due to the segment AB and 

 in indicates the crosstalk current at A due to BC. The latter current 

 is slightly smaller and slightly retarded in phase with respect to in 

 because in order for i,/ to appear at point A, the transmission current 

 Ia must be propagated a distance d and the resulting crosstalk current 



