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diff --git a/761/CH19/EX19.7.a/19_7_a.sce b/761/CH19/EX19.7.a/19_7_a.sce
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index 000000000..83f616f09
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+++ b/761/CH19/EX19.7.a/19_7_a.sce
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+clc;
+// page no 731
+// prob no 19.7
+// In given problem a TV receiver is tuned to channel 6.
+//All modern Rx uses a picture IF of 45.75 MHz with high-side injection of the signal into the cable.
+// The picture carrier of channel 6 is at a frequency of 83.25MHz,so
+ch=6;
+Fc=83.25;// expressed in MHz
+IF=45.75;//expressed in MHz
+f_lo=Fc+IF;
+a=f_lo+ch/2; b=f_lo-ch/2;
+disp('band','MHz',a,'to','MHz',b,'The interference would in');
+\ No newline at end of file