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XY Text Writer

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Uses the 33522A waveform generator to write text on scope screen. Turns scope into message board.

Letter_U()
function [y x] = Letter_U()
	%Create the letter U
    x1 = [.2 .1 0 0 0 0 0 0 0 0 0 0 0];
    y1 = [.1:.2:2.5];
    x2 = [.8 .9 1 1 1 1 1 1 1 1 1 1 1];
    y2 = [.1:.2:2.5];
    y3 = [0 0 0];
    y3 = y3 + .1;
    x3 = [.3:.2:.7];
    
    y = [y1 y2 y3];
    x = [x1 x2 x3];

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