COAXIAL CABLE SYSTEM FOR TELEVISION TRANSMISSION 441 



The repeaters used along this route were novel in that most of them 

 were placed in small iron boxes located at convenient points along the 

 line. Power for their operation was transmitted at sixty cycles over 

 the coaxial cable itself. Figure 5 shows one such unattended repeater 

 located near Dunellen, New Jersey. 



+5.0 



< +2.5 



-2.5 



-5.0 



■100 



-J -250 

 -300 

 -350 

 -400 

 -450 

 -500 

 -550 

 -600 



200 300 400 500 



FREQUENCY IN KILOCYCLES PER SECOND 



1000 



Fig. 3 — Overall attenuation of the New York-Philadelphia cable without repeaters 

 and the net attenuation after repeaters and equalizers had been provided. 



The coaxial system between New York and Philadelphia was 

 designed to provide 240 telephone circuits. Skeleton terminal appa- 

 ratus was installed at New York and Philadelphia to test out such 

 operation. This apparatus has been described 2. 3. 4 jj^ various papers 

 and will not be discussed here. Sufifice it to say that methods and 



