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+clc;
+
+//page 14
+//ex-1.10
+function [V]=voltage(PdBm)
+    P=1*10^(-3)*(10^(PdBm/10));
+    V=(75*P)^0.5;
+endfunction
+S=10;  //dBm
+G1=13;  //dB
+L1=26;  //dB
+G2=20;  //dB
+L2=29;  //dB
+disp('(a)  The output levels are');
+PdBm=S;
+V=voltage(PdBm);
+disp(V,'in Volts:',PdBm,'1. Signal source in dBm:');
+PdBm=S+G1;
+V=voltage(PdBm);
+disp(V,'in Volts:',PdBm,'2. Line Amplifier in dBm:');
+PdBm=S+G1-L1;
+V=voltage(PdBm);
+disp(V,'in Volts:',PdBm,'3. Cable section A in dBm:');
+PdBm=S+G1-L1+G2;
+V=voltage(PdBm);
+disp(V,'in Volts:',PdBm,'4. Booster amplifier in dBm:');
+PdBm=S+G1-L1+G2-L2;
+V=voltage(PdBm);
+disp(V,'in Volts:',PdBm,'5. Cable section B in dBm:');
+disp('(b).  The output power to get a voltage of 6V');
+V=6;   //volts
+R=75;  //ohm
+Po=(V^2)/R;
+disp('W',Po,);
+PodBm=10*log10(Po*1000/1);
+disp('dBm',PodBm,'power in dBm');
+GrdB=PodBm-PdBm;
+disp('dB',GrdB,'The required gain is');