VGA Cable 10m

Description

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-qualitycables typically contain coaxial wiring and insulation which make them thicker. A quality cable should not sufferfrom 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 longcables may not be the fault of the cable but may instead be caused by equipment with incorrect termination or by useof passive splitters), and other signal degradation effects; shorter VGA cables are less likely to introduce significantdegradation. 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.

Adapters

There are HDMI to VGA [1] and DVI to VGA adapters, and VGA to SCART converters. [2][3][4]For a simple VGA to SCART adapter cable to be viable, the display card must have sufficient features. Namely theability to provide interlaced output and adjust the frequency, number of total scan lines and number of visible lines(the actual resolution) to match those of the prevailing TV standard. [5] Signal incompatibility rises from the fact thatSCART uses composite sync, so either display card must be able to do so too, or sync signals must be summed witha simple circuit. Additionally some TV sets may require 1 volt voltage on SCART pin 16 as explicit signal to usecomponent instead of composite signal. [6] Likewise, three conductor analog RGB signal uses composite sync ongreen, but a converter circuit for to achieve that is simple as well. http://www.epanorama.net/circuits/sync_r.htmlHDMI/DVI to VGA adapters do not carry the audio channel. Separate audio cables are used.HDMI to VGA adapters generally won’t be useful as most displays can’t read analog over the HDMI port. Thedisplay’s EDID can still be read.