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+//chapter 11 example 5//
+clc
+clear
+//value of parameter=p,length of link=L,speed of light=c,wavelength=l,spectral width=dl,rise time=dtr//
+c=3*(10^8);//in mts per sec//
+l=830;//in nm//
+dl=40;//in nm//
+L=2.5*(10^3);//in mts//
+p=0.024;//value of parameter//
+dtmat=(-L*dl*p)/(c*l)*(10^9);
+dtmodal=(2.5*3.5);
+dtr=10;//in ns//
+dts=8;//in ns//
+g=sqrt((dts^2)+(dtr^2)+(dtmat^2)+(dtmodal^2));
+dtsys=1.1*g;
+printf("\n material dispersion delay time=%f m\n",dtsys)
+Btmax=(0.75/dtsys)*(10^9);
+printf("\n a)Btmax for RZ format=%f m\n",Btmax)
+Btmax1=(0.35/dtsys)*(10^9);
+printf("\n b)Btmax for NRZ format=%f m\n",Btmax1)
+\ No newline at end of file