102 



THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1952 



,/V\ — 



m^ ^'^ "^— III! 



Fig. 12 — Simulated two-path transmission. 



relative delay between the tAvo component pulses. Flat topped pulses 

 seem to be characteristic of conditions where the two carriers are in phase 

 quadrature and about equal in amplitude. 



Fig. 12 shows a set of conditions with a constant delay difference of 2 

 millimicroseconds (corresponding to a path difference in free space of 

 about 2 feet). For the pulses shown on Fig. 13 there was a constant delay 

 difference of 7.34 millimicroseconds, enough to provide complete separa- 

 tion of the pulses. The carriers were in phase opposition but with this 

 amount of separation there is no overlap of pulses and the results would 

 ha^'e l)een the same if the phase had been aiding. Any increase of delay 



Fig. 13 — Simulated two-path transmission. 



