DVI, or digital video interface, is a standard used to transfer digital video between computer and monitor. This standard is most commonly used for connecting LCD monitors, but it also works with modern GPUs and other devices.
DVI cables are available in both single-link and dual-link versions. DVI cables use transition-minimized differential signaling (TMDS) to transmit video signals over a cable. TMDS uses three data pairs that carry the designated 8-bit RGB component of the video signal for a total of 24 bits per pixel.
The length of a Dvi cable can make a difference to your digital video display. The quality of the signal is not degraded by distance like it is in an analog connection, but longer cables can produce undesirable anomalies such as artificial signal noise, pixel sparkling’ or screen flickering.
The shortest Dvi cable typically runs between 9 and 10 meters in length, providing the best possible signal reproduction to LCD screens. Longer cables can cause visual distortions that are difficult to avoid and are generally considered to be unusable at any length.
The maximum length of a DVI cable is not included in the DVI specification, but it does depend on the TMDS clock frequency. For displays using resolutions of 1920 x 1200 or lower, cable lengths up to 4.5 meters (approximately 15 feet) will work. For longer distances, the use of a DVI booster is recommended to mitigate signal degradation.
The connectors on DVI cables come in four different types. They are DVI-D, DVI-A, DVI-I and DVI-P (also known as P&D).
DVI-D connects to digital equipment that needs a digital video signal. These include DVI-D monitors, DVD players, and cable/satellite set-top boxes that don’t use analog signals.
It also supports HDCP compliance and includes control signals for reducing power consumption. It’s a great option for connecting to a high-end TV or projector.
A DVI-D monitor can support resolutions of up to 1920 x 1200, which is significantly higher than the resolution available with component and S-video connections. It also supports 165 MHz of data transmission on a single TMDS twisted pair.
DVI-D also offers a dual-link option, which can handle twice as much information. Its TMDS technology can transfer up to 1.65Gbps of information on two twisted pairs.
Dvi cables come in various wire thicknesses or gauges. These range from soft, pliable wires that are used for craftwork to hard, stiff ones designed for more heavy-duty applications.
The American Wire Gauge (AWG) system rates wire with a numerical designation that runs opposite the diameter of the conductors, with lower numbers referring to smaller diameters and higher numbers referring to thinner wires. For example, an AWG of 0 is 0.003 inches in diameter while an AWG of 40 is 0.013 inches in diameter.
The size of a wire determines how much current it can safely carry. Using the correct size gauges and types of wire materials is essential for engineers in designing power systems.
DVI Cable Manufacturers provide high-quality digital video interface (DVI) and analog signals to display devices. These cables are designed to transmit data from a digital source device such as a computer monitor or video card to an analog monitor, TV, projector or other display.
DVI cables use TMDS (transmission minimized differential signaling), which transmits two halves of each video signal down a single twisted pair wire. These two halves are then measured against each other to compensate for any degradation that may have occurred during transmission.
DVI cables are sensitive to many performance characteristics that can negatively affect picture quality, such as skin effect, skew, and impedance variations. Because of this, it is important to choose a DVI cable that will perform well over long lengths.