Method and apparatus for calibrating electronic scales for the h

Details Method and apparatus for calibrating electronic scales for the h Method and apparatus for calibrating electronic scales for the h

1993-07-29

1995-04-25

Wieder, Kenneth A.

Electricity: measuring and testing

Testing and calibrating electric meters

345 14, 348194, 327134, G01R 104

Patent

active

054102456

ABSTRACT:
A method and apparatus of calibrating electronic scales for the horizontal axis of an oscilloscope is provided. For each of two electronic scales or cursors, output voltages of a horizontal deflection circuit are generated. A measurement is made to determine a time interval in which the voltage of a sweep waveform, generated by a sweep waveform generator and appearing at the output of the horizontal deflection circuit, passes the two output voltages. The slope of the sweep waveform generated by the sweep waveform generator is adjusted such that the time interval coincides with a target time interval.

REFERENCES:
patent: 3840302 (1974-10-01), Brunton et al.
patent: 4196629 (1980-08-01), Philips
patent: 4540982 (1985-09-01), Jalovec
patent: 4542339 (1985-09-01), Iwakura et al.
patent: 4553091 (1985-11-01), Bristol
patent: 4581585 (1986-04-01), Bristol

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