Method and apparatus for determining and selectively displaying

Details Method and apparatus for determining and selectively displaying Method and apparatus for determining and selectively displaying

1995-01-20

1996-06-25

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324 7611, 324115, 395140, 364483, 364482, 341120, G01R 2316

Patent

active

055303730

ABSTRACT:
An electronic test instrument adapted for displaying only meaningful information notwithstanding the intermittent arrival of valid input signals due to probing operations is provided. Two independent measurement processes measure the input signal simultaneously. The first measurement process operates in a similar fashion to a digital storage oscilloscope (DSO) by successively sampling the input signal to produce waveform information which are selectively sent to an LCD display device which graphically displays the waveform. The second measurement process continually performs a stability assessment of the input signal by collecting a series of stability measurements of a selected input signal parameter, creating a moving average of the series, and comparing each new stability measurement to the moving average relative to stability criteria. The stability decision controls the flow of waveform information to the display, thereby ensuring that only meaningful information is displayed based on waveform scans conducted when the input signal is stable.

REFERENCES:
patent: 4532470 (1985-07-01), Wiesmann
patent: 4663586 (1987-05-01), Swerlein et al.
patent: 5012181 (1991-04-01), Eccleston
patent: 5127035 (1992-06-01), Ishii
patent: 5138252 (1992-08-01), Ferguson
patent: 5142221 (1992-08-01), Meldrum et al.

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