Method and apparatus for the generation of mixed REFRESH and ROL

Details Method and apparatus for the generation of mixed REFRESH and ROL Method and apparatus for the generation of mixed REFRESH and ROL

1987-07-07

1989-06-06

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

324112, 324121R, 364487, G09G 106

Patent

active

048375616

ABSTRACT:
According to a method and apparatus for displaying data on a display screen, such as the screen of a digital storage oscilloscope, in a ROLL mode and prior to a trigger event, newly acquired data is continuously newly displayed at a given point on the screen as the oldest displayed data is rolled off the screen at a first side. This is continued even during a REFRESH mode until a trigger event occurs, at which time the displayed data is frozen on the screen and newly acquired data is written across the screen toward a second side of the screen, so that at the time the newly acquired data is written to the second end of the screen, data is observable which represents a certain period before the trigger event and after the trigger event.

REFERENCES:
patent: 3406387 (1968-10-01), Werme
patent: 3653027 (1972-03-01), Scheer
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patent: 4251814 (1981-02-01), Dagostino
patent: 4251815 (1981-02-01), Dagostino
patent: 4346333 (1982-08-01), Dagostino
patent: 4470043 (1984-09-01), Sorensen et al.
patent: 4644337 (1987-02-01), Shank et al.
patent: 4647862 (1987-03-01), Blair

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