What is coaxial cable? Center conductor - copper-clad steel. Center conductor bond - clean stripping polymer is utilized to block moisture migration. Dielectric - polyethylene providing mechanically stable, closed cell foam with high VP. First outer conductor - shield with an aluminum-polymeraluminum tape securely bonded to the dielectric core.
Second outer conductor - an additional aluminum-polymer-aluminum tape is used in tri-shield and quad-shield constructions to further enhance HF shield isolation before and after flexure. Third outer conductor - an additional aluminum-polymer-aluminum tape is used in tri-shield and quad-shield constructions to further enhance HF shield isolation before and after flexure.
Fourth outer conductor - an additional 34 or 36 AWG aluminum braid is used in quad-shield constructions to further improve LF shield isolation in extreme RF noise environments. Corrosion resistant protectant Indoor and aerial - a non-drip material designed to eliminate moisture migration into the cable construction.
Underground - a flowing compound able to seal small jacket ruptures. Jacket - a UV stable outer jacket of either polyethylene PE or flame retardant polyvinyl chloride PVC is available to protect the core during installation and for the installed life of the cable. Integral messenger - a galvanized, carbon steel wire support member attached to the cable by a separable web. Which is better: coaxial cable or fiber optic cable? Previous Post. Next Post. Leave your comment. Recent Posts.
Products Fiber Coaxial Category. However, even component cables have had their day — high-resolution HDMI is now typically the connection of choice for the latest generation of audio-visual equipment.
Because the video signal is forced to travel through a single cable it is heavily compressed, losing much of its resolution and picture clarity. The cables also suffer from radio frequency interference, which further degrades picture quality.
When given the option, go for component over composite every time because this connection will always provide a better picture at higher resolutions. The only practical use for composite video today is when using older equipment, such as older video game systems or VCRs, which do not support the component video format. Because of this, some new HDTVs include at least one composite video input to make them compatible with old equipment.
Component video splits the video signals into three cables — green, blue and red — with each transmitting a specific component of the video signal. The green cable also called Y transmits the brightness information of the signal. Green components are inferred by a combination of all three signals. Since component video is spread across three separate cables, it does not need to be as compressed as composite video, allowing support for HD resolutions as high as , as well as progressive scan images that create smoother images with more defined edges.
Component cables initially replaced composite as the de facto analog video cable, thanks to its improved picture quality and HD support. Nearly all HDTVs made today have at least one set of component inputs. Component video is also supported by most video game consoles, DVD players, digital video recorders, cable set-top boxes and Blu-ray players. Component Limitations Component video cables are analog, just like composite cables. And also like composite cables they have inherit limitations that are tied to the analog format.
Analog cables transmit their signals via waveforms, digital cables transmit their signals the same way a computer transmits data — through binary code that is decoded by the display device into a viewable picture.
Environmental factors can also have a significant affect on signal inteference and distance of transmission. However, there are some general guidelines on HDMI cable distance limitations; the below diagram gives the comparative range of each cable standard, as well as distance capabilities of alternative Ethernet cable and over-IP transmission options such as video-over-Ethernet cable, HDBaseT and SDVoE video-over-IP technology which allow for HD, 4k UHD audio video signals to be transmitted over longer distances.
High Definition Multimedia Interface is a digital signal transmitting zeros and ones. This means that the cable should, in theory, either work or it won't. However, signals can and will often be affected by factors such as:.
In most cases for simple device-to-device connectivity, there is simply no need to spend vast amounts on HDMI leads. With over 50 years experience in supply and system design for many of the UK's largest, high profile audio projects, our AV experts provide a unique level of technical support and customer service. Subscribe to our YouTube channel now at howtoav.
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