Published:2009/7/11 2:51:00 Author:May | From:SeekIC
IC5 generates RS-170 NTSC synch.IC1,IC2 and IC3 make up the red,green,and blue video signals that drive the videoencoder section of IC6 to make up the color bars. IC3 is an a÷2 counter that drives 4-bit counter IC1.Gates IC2a through IC2b formthe R,B,and G,Video signals.IC6 encodes these,plus synch,to form an NTSC video output signal,which appears at TP12.
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