Method and apparatus for calibrating deflection in an oscillosco

Details Method and apparatus for calibrating deflection in an oscillosco Method and apparatus for calibrating deflection in an oscillosco

1984-12-24

1987-06-30

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

With radiant energy sensitive control means

358 69, 324404, H01J 3126

Patent

active

046773401

ABSTRACT:
The cathode-ray-tube beam deflection of an oscilloscope is automatically calibrated by photoelectrically detecting the intersection of the tube's electron beam with visible graticule lines on the tube's faceplate. An input signal is compared, at the time of intersection, with stored values representative of the graticule lines, and the deflection amplifier gain of the oscilloscope is adjusted until the graticule lines properly represent the measurement of the input signal.

REFERENCES:
patent: 4021724 (1977-05-01), Rawcliffe et al.
patent: 4099092 (1978-07-01), Bristow
patent: 4439735 (1984-03-01), Alvite et al.

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