Testing of magnetic memory planes

Claim 1

APPARATUS FOR TESTING THE NOISE DISTURBANCE IN A MAGNETIC CORE MEMORY ARRAY INCLUDING A PLURALITY OF MAGNETIC CORES CAPABLE OF BEING SWITCHED BETWEEN FIRST AND SECOND STABLE CONDITIONS OF REMANENT MAGNETIC FLUX ARRANGED IN X COORDINATE ROWS AND Y COORDINATE COLUMNS, CORRESPONDING X AND Y COORDINATE CONDUCTORS LINKING CORRESPONDING ROWS AND COLUMNS OF CORES, AND A SENSE WINDING LINKING ALL OF SAID CORES SO AS TO INTERCEPT THE ELECTROMAGNETIC FIELD OF SUBSTANTIALLY HALF THE CORES OF EVERY ROW AND COLUMN IN ONE EFFECTIVE DIRECTION AND HALF IN THE OPPOSITE DIRECTION, SAID APPARATUS COMPRISING: MEANS FOR APPLYING TO SAID SENSE CONDUCTOR A FIRST PULSE TO SWITCH HALF OF SAID CORES IN EVERY ROW AND COLUMN TO ONE STABLE FLUX CONDITION AND THE OTHER HALF OF SAID CORES IN EVERY ROW AND COLUMN TO THE OTHER STABLE FLUX CONDITION, MEANS FOR APPLYING TO SAID SENSE CONDUCOTR A SECOND PULSE TO READ DISTURB HALF OF SAID CORES IN EVERY ROW AND COLUMN AND WRITE DISTURB THE OTHER HALF OF SAID CORES IN EVERY ROW AND COLUMN, MEANS FOR APPLYING TO SELECTED COORDINATE CONDUCTORS RESPECTIVE THIRD PULSES TO SWITCH THE CORE LINKED BY SAID SELECTED CONDUCTORS AND FURTHER DISTRUB THE FLUX CONDITION OF THE REMAINING CORES LINKED BY EACH SELECTED COORDINATE CONDUCTOR, AND MEANS FOR DETECTING THE NOISE SIGNAL INDUCED IN SAID SENSE WINDING BY SAID SWITCHED CORE AND THE FURTHER DISTRUBED CORES.