Science Fair Project Encyclopedia
Since the NTSC color television standard is susceptible to color errors, there is a tint control on NTSC television sets, which allows the image hue to be corrected. This is traditionally a knob but is today mostly available through an on-screen menu (OSD).
The control allows the image to be adjusted between a green and a violet tint, with the correct hue lying somewhere in between. Dynamic adjustment may be needed in case of an antenna signal, because the path of the signal changes according to atmospheric conditions. The tint can oscillate during a storm. If the signal travels a fixed path, e.g. from a cable television network or a DVD player, dynamic adjustment should not be necessary.
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