Oscilloscope based signal level measurement system

Details Oscilloscope based signal level measurement system Oscilloscope based signal level measurement system

G - Physics

01

R

375/33

G01R 13/22 (2006.01)

Patent

CA 1267981

Abstract In an oscilloscope, a readout control circuit is adapted to create a horizontal cursor on an oscilloscope screen at a vertical level controlled by cursor level data generated by is microcomputer, and to cause the beam to form characters on the screen indicating a voltage represented by the vertical level of the cursor. Vertical offset and vertical gain parameters characterizing a vertical preamplifier system controlling display of a wave- form are measured and utilized to determine the value of cursor level data needed to cause the readout control circuit to position the cursor on the screen to accurately reflect a selected voltage with respect to voltage magnitudes represented by points on the displayed waveform. The oscilloscope is adapted to measure peak magnitudes of a vertical preamplifier input signal, and the readout control circuit permits the oscilloscope to display a cur- sor on a screen at a level indicating the magnitude of the measured peak with respect to magnitudes represented by a displayed waveform.

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