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BELL SYSTEM TECHNICAL JOURNAL 



equal in absolute magnitude to each other. This lack of symmetry is due 

 to the fact that c is ()nl\' 10 limes v. 



115 3 



8 2 8 4 



PEAK PHASE SHIFT IN RADIANS 



Fig. 9— Spectrum of phase modulated wave cos {ct + k sin vt) as function of peak phase 

 shift k for values of ^ up to tt radians. 



One way of proving this is to go through the process of computing the 

 c — V term in this pulse modulated wave just as ihc c-\-v term was computed 



