BAND WIDTH AND TRAXSMISSIOX PERFORM A\XE 



555 



mentation, it should be pointed out that the ehistic schemes tend to become 

 complex apparatus-wise. If one chooses to discount this on the grounds 



4 6 8 10 20 40 60 80 100 20C 



RADIO SIGNAL BANDWIDTH IN MEGACYCLES PER SECOND 



400 



r 



I ' I ^1 



FRAME TIME = 125//S- 

 I 8(-) 



5|6I 7(+) 



X-T" 



l|2]3l 4(+) 



rur\ rO" _ — , 



;T1t1t; •t4 + 3T iT;T; t7 + 3T ; 2T ; ts + ^T l tg + ST , 21 , 



N = NUMBER OF CHANNELS 

 a - NUMBER OF ACTIVE CHANNELS 



IIO(-) 



to = 



'^^-i ^^17 



TT tc 



SLICER ADVANTAGE = 20 LOGio ^ ^-3DB 



I 



:RF PULSE TO INTERFERENCE RATIO + 20 LOG ,o -3- 



rr tc 



-3 



CALCULATED for: RFRATI0=9DB (MARGINAL) 

 N = 1000 K - 6.3 (16 DB) 

 N = 100 K = 2.83 (9DB) 



A- 1 



N 8 



Fig. 23— Theoretical possibilities of exploiting non-simultaneous load advantage by an 

 elastic PLM-AM system. 



Ihat future developments may resolve the complexity, there remains the 

 objection that any system designed to take advantage of the multiplex load 

 rating counts heavily on being used almost exclusively for conversational 



