BAM) WIDTH WD TRAXSM ISSIO.X PERFORMANCE 



MAXIMUM CIRCUIT LENGTH, Lq, IN MILES (FOR I DB PER MILE) 



571 



400 600 1000 2000 4000 



10,000 



40,000 100,000 



40 60 100 200 400 600 1000 2000 4000 10,000 



OPTIMUM NUMBER OF SPANS, Oo 



Fig. 31 — Optimum number of repeater sections and maximum circuit length for metal- 

 lic PPM-AM system with reshaping at every repeater. 



100 

 18 



MAXIMUM CIRCUIT LENGTH , Lq.IN MILES (FOR I DB PER MILE) 

 200 400 600 1000 2000 4000 10,000 40,000 



-r 



100,000 



40 60 



10,000 



100 200 400 600 1000 2000 



OPTIMUM NUMBER OF SPANS , Hq 



Fig. 32— Optimum number of repeater sections and maximum circuit length for metal- 

 lic FM system with limiting at every repeater. 



modulation methods discussed in this paper. We will not attempt to make 

 such a re-evaluation here. 



