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//Example 12.7
//Program to estimate the maximum bit rate that may be achieved on
//the link when using NRZ format
clear;
clc ;
close ;
//Given data
L=8; //km - LENGTH OF FIBER LINK
Ts=8*10^(-9); //s - SOURCE RISE TIME
Dn=5*10^(-9); //s/km - INTERMODAL RISE TIME
Dc=1*10^(-9); //s/km - INTRAMODAL RISE TIME
Td=6*10^(-9); //s - DETECTOR RISE TIME
Tn=Dn*L;
Tc=Dc*L;
//Total Rise Time
Tsyst=1.1*sqrt(Ts^2+Tn^2+Tc^2+Td^2);
//Maximum bit rate
Bt= 0.7/Tsyst;
//Displaying the Result in Command Window
printf("\n\n\t Maximum bit rate, Bt(max) is %0.1f Mbit/s which for NRZ is equivalent to a 3 dB optical bandwidth of %0.1f Mbit/s.",Bt/10^6,Bt/10^6/2);
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