Underscan definitions

Underscan

Decreases raster size in both H and V so that all four edges of the picture are visible on the monitor.
Found on http://www.zoo.co.uk/~z0001325/Glossary.html

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Underscan

The picture content does not fill the whole picture tube area which means that there are borders aro
Found on https://www.encyclo.co.uk/local/22375

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