Automatic magnetic field compensator for a CRT

摘要: An apparatus for automatically compensating the deflection of electron beam in a cathode ray tube display by earth's magnetic field (EMF) detects EMF at installation site detector comprising plurality sensors sensing x, y, z component field. A pulse generator and counter transform each detected into predetermined gate signal then output to microcomputer. The microcomputer compares indicative with reference stored internal memory obtain compensation value. further outputs value processor, which compensates tube.