COMMON FREQUENCY BROADCASTING 



597 



ing. Also the rapid decrease in the amount of distortion present as the 

 field strength ratio diverges from unity is noteworthy where /S 5^ 0. 

 The distortion for values of jS = and equal degrees of modulation 

 {V = 1) remains constant in both these series of curves because this is 

 the limiting case and is the distortion that would result from the re- 



30 



r 



60 90 120 150 



RADIO PHASE ANGLE IN DEGREES 



pig_ 15 — Ratio of distortion products to fundamental with 50 per cent modulation 

 of each carrier for varying audio and radio phase angles, /3 and 7 respectively, where 

 the field strength ratio E1IE2 = 1. 



ception of a similar program from but a single station. This fact 

 affords a basis for comparison in considering the additional distortion 

 that results under certain conditions from the simultaneous operation 



