Dvi Cable Manufacturers manufacture cables and wire to connect video equipment like DVD players, cable/satellite set-top boxes, high-definition televisions, and projectors. Their product lines also include AV over CAT5 and AV over IP.
DVI cables are available in a variety of lengths and connector types. However, there are a few things to look for when selecting the best DVI cord.
Cable Connectors
Dvi Cable Manufacturers use a variety of connector types to connect video signals to AV equipment. The most common connector type is DVI-D, which transmits digital video signals.
DVI-D cables have 19 pins (18+1) and dual-link DVI-D cables have 25 pins (24+1). DVI-D cables are typically used to connect a computer graphics card to an LCD monitor, and DVI-D cables can support resolutions up to 2560×1600 pixels.
A single-link DVI interface uses a TMDS link containing red, green, and blue twisted pairs. This TMDS signal is clocked up to 165 MHz, which supports resolutions up to 1920×1200 at 60 Hz.
DVI and HDMI are relatively high bandwidth devices, but their performance is limited by skin effect, skew, attenuation, and other factors. This can affect the signal’s ability to transmit and recover. Fortunately, advancements in the silicon and board layout of the transmitter and receiver devices improve their capabilities. However, the quality of the cable’s insulation and length still have a significant impact on its ability to deliver the signal.
Cable Length
As with most digital video signals, the length of a Dvi Cable plays a critical role in signal quality. While DVI does not degrade like analog signals, longer lengths can cause a loss in image quality.
For a clear, uninterrupted signal that is free of unwanted video anomalies such as pixel ‘sparkling’, screen flickering and image shaking, DVI cables between 9 and 10 meters in length perform well.
However, extending DVI cables beyond this limit can result in a signal loss that is unusable. This is because longer DVI cables are more prone to inter-pair skew, which can cause timing errors and data dropouts.
Cable Material
Digital visual interface (DVI) cables are used to transmit high-definition video signals to computer monitors, LCD televisions and projectors. These digital optical cables provide a purer signal than coaxial cabling.
Unlike older analog video systems, DVI and HDMI interconnect use a unique encoding technology called transmission minimized differential signaling (TMDS), which separates the two halves of a signal and protects them from degradation. This eliminates signal noise that can degrade the quality of a display.
The dielectric material in a video cable plays an important role in the behavior of the center conductor, determining its impedance and the level of signal attenuation. The best-performing cables today are rated for impedance within +/- 1.5 ohms, and even the low-flex cables come close to that limit.
The dielectric in video cables can be of several different materials. Foamed polyethylene (PE) is the most common these days, though Teflon-dielectric cables are also available. These are more expensive, but they are better suited for professional applications where fire codes call for plenum-rated2 cables.
Cable Type
Dvi Cable Manufacturers use cables that transmit digital signals through a twisted pair of copper wire. This technology, called transmission minimized differential signaling (TMDS), protects the video signal from degradation.
Single-link DVI cables support resolutions up to 1920 x 1080 at 60 Hz. They also have 8 fewer pins than dual-link DVI cables.
HDMI, on the other hand, is a high-speed digital interface that uses a combination of twisted pair copper wire and fiber optic cable. It can transmit high-definition video and audio data, as well as computer signals.
Unlike HDMI, however, DVI does not support features such as HDCP, which is an encryption standard for copy protection on high-definition content. This makes DVI an inferior choice when connecting devices that require HDMI to display high-definition video.
Dvi Cable Manufacturers offer a wide range of products for connecting computers and other electronics to display screens. They sell stock and custom cable assemblies, as well as connectors, adapters and power cords. They serve various industries, including data centers, telecom, communication, military and transportation.
