Cable Quality
The same VGA cable can be used with a variety of supported VGA resolutions, ranging from 640×400px @70 Hz (24 MHz of signal bandwidth) to 1280×1024px (SXGA) @85 Hz (160 MHz) and up to 2048×1536px (QXGA) @85 Hz (388 MHz). There are no standards defining the quality required for each resolution, but higher-quality cables typically contain coaxial wiring and insulation which make them thicker. A quality cable should not suffer from signal crosstalk which occurs when the signals in one wire induce unwanted currents in adjacent wires, ghosting which occurs when impedance mismatches cause signals to be reflected (note that ghosting with long cables may not be the fault of the cable but may instead be caused by equipment with incorrect termination or by use of passive splitters), and other signal degradation effects; shorter VGA cables are less likely to introduce significant degradation. Some higher-end monitors and video cards featured 5 separate BNC connectors for RGBHV signal, allowing highest quality connection using five 75 ohm coaxial cables.
Read more about this topic: VGA Connector
Famous quotes containing the words cable and/or quality:
“To be where little cable cars climb halfway to the stars.”
—Douglass Cross (b. 1920)
“Self-esteem evolves in kids primarily through the quality of our relationships with them. Because they can’t see themselves directly, children know themselves by reflection. For the first several years of their lives, you are their major influence. Later on, teachers and friends come into the picture. But especially at the beginning, you’re it with a capital I.”
—Stephanie Martson (20th century)