PRIVATE LINE DATA TRANSMISSION 



1483 



band),Fc becomes (neglecting the factor §) 



Vc = cos (oj + ^)t. 



(4) 



At the receiving end, Vc is modulated with a carrier which may mo- 

 mentarily differ in phase from the signal carrier by angle tp, giving 



Vo = cos (w + 12)^ cos {ut + (f), (5) 



= ^ cos [(w + U)t - (oot + -p)] + I cos [(co + n)t + {cot + <p)]. (6) 



The lower frequency part of Vo constitutes the recovered signal, and 

 it is extracted by a filter that attenuates the higher frequency part. Thus, 

 again neglecting the factor of |, 



Vr = cos {o)t -\- 9.t — ut — tp), 



(7) 



Vr — cos {^t — (f). 



r 







(f) 



4 



7L 



2 



(d) 



(e) 



4 



TT 



(J) 



Fig. 7 — Distortion of baseband pulse signal in single sideband carrier facility. 



