Alignment of a video display system having multiple inputs

Details Alignment of a video display system having multiple inputs Alignment of a video display system having multiple inputs

1974-11-29

1976-11-30

Farley, Richard A.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

315377, 340324A, G01S 722, G08B 2300

Patent

active

039952690

ABSTRACT:
Alignment apparatus is disclosed for use in a radar display system in which targets are displayed on a raster scanned cathode ray tube and a computer causes target identities to be displayed adjacent to each target. To align the display system the computer generates a first signal which is applied to the system in the same manner as are radar video signals, and generate a second signal which is applied to the system in the same manner as are target identity signals. The two signals cause two dot test patterns to be displayed on the tube and interactive display techniques including a positional entry device such as a light pen are used to cause the two test patterns to be superposed. In response to superposition of each dots of the test patterns, the computer generates and stores correction signals which are thereafter used to modify the target identity signals to assure that target identities are displayed in proper registration with the targets.

REFERENCES:
patent: 3324471 (1967-06-01), Rover, Jr.
patent: 3337860 (1967-08-01), O'Hara, Jr.
patent: 3440638 (1969-04-01), Van Valkenburg
patent: 3543269 (1970-11-01), Dudley
patent: 3648283 (1972-03-01), Busch et al.
patent: 3753032 (1973-08-01), Naidich et al.
patent: 3896432 (1975-07-01), Young

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