A cable stores a small amount of energy between
conductors; this quality is called capacitance, and it limits the cable??™s ability to handle
fast signals. The longer the cable, or the poorer the insulator, the more energy is
stored. This restricts the maximum refresh rate that can be used without noticeable
image degradation.
Monitor connections
Monitors connect to a video card using one of these standard connection schemes:
Television
All of the color, luminosity (brightness), and synchronization information is
encoded into a single composite analog electrical signal. This type of signal is
most useful for connecting to consumer video equipment such as a VCR or television;
the standard connector is a coaxial ???RCA??? plug.
One variation on a television video signal is S-Video, which separates the luminance
and chroma (color) information onto separate wires; many video cards
that have a ???TV Out??? feature use this type of connector. In Europe, a rectangular
SCART connector is standard and may include a composite signal.
VGA
An analog connection scheme that uses varying voltages on three separate pins
to control the RGB levels. Additional pins are used for synchronization and
device probing.
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