Adjustable electronic graticules for measuring waveform distorti

Details Adjustable electronic graticules for measuring waveform distorti Adjustable electronic graticules for measuring waveform distorti

1990-06-28

1991-04-02

Wieder, Kenneth

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Cathode ray

324158R, 324115, 324 731, 364487, 315377, G01R 3122, G01R 1330

Patent

active

050049755

ABSTRACT:
Adjustable electronic graticules for measuring waveform distortions are generated from operator inputs indicating a measurement mode and a scale factor. A template of a graticule for the measurement mode in the form of a display list of move and draw instructions is scaled by the scale factor and a measurement value is computed from the scale factor and the instrument units per division setup. The graticule and measurement value are stored as a modified display list. A readout engine interprets the modified display list and produces electrical signals for drawing the graticule and measurement value on a display monitor. The electrical signals are combined with the waveform for display on the display monitor. The operator varies the scale factor until the displayed graticule touches the waveform at a measurement point, and the measurement value is accordingly displayed.

REFERENCES:
patent: 4283655 (1981-08-01), Mossman et al.
patent: 4743844 (1988-05-01), Odenheimer et al.
patent: 4751504 (1988-06-01), Slavin
patent: 4761640 (1988-08-01), Slavin
patent: 4764721 (1988-08-01), Slavin
patent: 4924175 (1990-05-01), Clinton

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