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+// Exa 4.3
+// To calculate the spacing between successive pulses of the multiplexed signal.
+
+clc;
+clear all;
+
+Fs=8*10^3;  //in Hz
+Fm=3.4*10^3; // in Hz
+VCH=24; //voice channels
+SCH=1; //sunchronization channel
+PDur=1;  //extra pulse duration in microsec
+
+//solution
+Ts=1/(Fs);
+TimeCH=Ts/(VCH+SCH)*10^6;   // in microsec
+printf('Time between the pulses is %d microsec\n',(TimeCH-PDur));
+//Now by using the engineering version of Nyquist rate sampling
+NyquistRate=2.2*Fm;
+Ts1_microsec=1/NyquistRate*10^6;
+Tc=round(Ts1_microsec)/(VCH+SCH);
+printf(" Time between the pulses by using engineering version of Nyquist rate sampling  is %.2f microsec\n",(Tc-PDur));