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+clc;
+//page no 5-13
+//Example 5.8
+//Given carrier swing is 70kHz and frequency of modulating signal is 7kHz
+Cs=70;//in kHz
+fm=7;//in kHz
+//Carrier swing=2*frequency deviation
+fd=Cs/2;
+disp(+'kHz',fd,'Frequency deviation is');
+beta1=fd/fm;
+disp(beta1,'Modulation index is');