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+// Exa 3.3
+
+clc;
+clear;
+
+// Given
+
+NF = 30; // Noise figure in dB
+BW = 1; // Bandwidth of 3 dB filter in kHz
+
+// Solution
+
+printf(' The noise level of the spectrum analyser is related to the noise figure and the IF bandwidth by the following equation - \n MDS = -114 dbm + 10*log(BW/1MHz) + NF \n so, by calculation :- ');
+
+MDS = -114 + 10*log10(BW*10^3/10^6)+NF;
+
+printf(' MDS = %d dBm \n ' , MDS);
+
+// The answer provided in the textbook is wrong