APPLYING CARRIER TELEPHONE SYSTEMS 



563 



TABLE 6 

 Charlotte-New York Type K Carrier Noise Computations 



Section 



Estimated 

 57 kc 

 Noise 

 Level 2 

 at Rept. 

 Output 



Charlotte-Charlotte KN 



Charlotte KN-Salisbury KS 



Salisbury KS-Salisbury 



Salisbury-Salisbury KN 



Salisbury KN-Greensboro KS 



Greensboro KS-Greensboro 



Greensboro-Greensboro KN 



Greensboro KN-Durham KS 



Durham KS-Durham 



Durham-Durham KN 



Durham KN-Norlina KS 



Norlina KS-Nor!ina 



Norlina-Norlina KN 



Norlina KN-McKenney KS 



McKenney KS-McKenney 



McKenney-McKenney KN 



McKenney KN-Richmond KS 



Richmond KS-Richmond 



Richmond-Richmond KN 



Richmond KN-Fredericksburg KS. . 

 Fredericksburg KS-Fredericksburg . 

 Fredericksburg-Fredericksburg KN . 

 Fredericksburg KN-Washington KS 



Washington KS-Washington 



Washington-Washington KN 



Washington KN-Baltimore 



Baltimore-Baltimore KN 



Baltimore KN-Elkton KS 



Elkton KS-Elkton 



Elkton-Elkton KN 



Elkton KN-Philadelphia KS 



Philadelphia KS-Philadelphia 



Philadelphia-Philadelphia KN 



Philadelphia KN-Princeton KS. . . . 



Princeton KS- Princeton 



Princeton-Princeton KN 



Princeton KN-New York KS 



New York KS-New York 



Charlotte-New York Totals 



- 9.15 

 + 5.91 



- 7.60 

 + 14.13 

 -f 2.06 

 + 4.70 

 + 7.10 

 -f 17.29 

 + 5.31 

 + 17.07 

 + 3.12 

 + 11.86 



- 6.11 

 8.91 



.78 

 8.49 

 .71 

 .60 

 5.94 

 5.94 

 6.11 

 2.95 

 6.69 

 4.72 

 4.06 

 3.09 

 3.49 

 3.61 

 1.84 

 8.99 

 -12.20 



- 1.34 

 -12.77 



- 9.34 



- 9.67 



- 2.75 



- 5.38 



- .69 



+ 23.463 



+ 

 + 

 + 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



+ 



' Attenuation figures used: 3.76 for U.G. at 73° and 3.94 for Aerial at -110' 

 ^ For top channel, referred to — 9 db switchboard level. 

 3 Computed on a root-sum-square basis. 



Figure 6 shows a comparison of the computed levels for maximum 

 cable temperature conditions in the New York-Philadelphia Cable 

 under conditions of both regulation and non-regulation. Omitting the 

 regulation from a carrier repeater office where noise conditions and 



