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Communication Cables - Coaxial, Drop, UTP and Fibre Optic Cables

There are numerous types of Communication Cables available in the market today, but we depend on some types of Cables like Coaxial Cables, Drop Cables, UTP Cables and Fibre Optic Cables more often. These Cables are applicable in different types of data transfer in our day to day life.

Coaxial cable is called "coaxial" because it includes one physical channel that carries the signal surrounded (after a layer of insulation) by another concentric physical channel, both running along the same axis. The outer channel serves as a ground. Many of these cables or pairs of coaxial tubes can be placed in a single outer sheathing and, with repeaters, can carry information for a great distance.

HDMI Cable

PVC jacketed Bus Drop Cable is intended for use as drop cables from overhead busways and allows easy relocation of plant equipment.Resistant to oils, lubricants, acids, alkalies, ozone, water and abrasion. Individual grounds per conductor. Conductors, grounds and filler are cabled for flexibility then wrapped in a separator to aid strippability. Rated for use in wet or dry locations.

Unshielded Twisted Pair (UTP) cable contains 4 twisted pairs of wires, a total of 8 wires. The strands that constitute each wire will either be a single strand or multiple strands, usually referred to as solid or flex. Typically the solid is used to run through walls and ceilings and the flex is used to make drop cables (the cable from the wall plate to the desktop computer) and patch cables (the cable from the patch panel to the hub). Whether the exterior portion of the cable that contains the 4 twisted pairs, the jacket, is Plenum grade or Non-plenum grade is very important, it refers to the Fire Codes.The pairs of wires in UTP cable are colored so that one can identify the same wire at each end. Furthermore, they are usually color coded by pair so that the pairs can also be identified from end to end.

Fiber Optic Cables use light pulses to transmit information down fiber lines instead of using electronic pulses to transmit information in copper lines.Light pulses move easily down the fiber-optic line because of a principle known as total internal reflection. "This principle of total internal reflection states that when the angle of incidence exceeds a critical value, light cannot get out of the glass; instead, the light bounces back in. When this principle is applied to the construction of the fiber-optic strand, it is possible to transmit information down fiber lines in the form of light pulses.

Communication Cables - Coaxial, Drop, UTP and Fibre Optic Cables

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RGB Cables

RGB cables are named so, because the plugs at the ends of the cables are color coded red, green and blue. There are a variety of RGB cables. All RGB cables are a type of component video cables. Component video cables are able to split video signals into three different signals. Two of the three signals control how much red and blue there is in a picture. They are called the B-Y and R-Y components. The third signal, called the luminance signal handles black and white information and controls the brightness of a picture. It is often called the Y component. Unlike composite cables, there is no compression of any signals. Because of this the depth of color and resolution achieved is superior to composite video and is even an improvement of S-Video setups.

RGB is still sometimes used on computers but is increasingly being replaced by digital formats that require digital video interface cables (DVI cables). Some of the many devices that are RGB input devices and use RGB cables and technology are color televisions, digital cameras and scanners. There are also several RGB output devices that are used very often. They include, computer and cell phone displays, television sets with a variety of display types such as cathode ray technology (CRT), liquid crystal display (LCD) and plasma display or LED display, video projectors, and the large screen displays called JumboTron that are used at many sporting facilities and entertainment venues.

HDMI Cable

RGB analog composite video signals must always be combined with some other signal in order to function properly. One of the ways this is done is called composite sync. In any type of display, the resolution is determined by the number of pixels that are arranged both vertically and horizontally on the display device such as a computer monitor or a television monitor. The number of vertical lines in the display is always fixed. The vertical lines are also often referred to as scan lines. However, conversely the number of pixels that are in between each vertical line can vary. The amount of pixels determines the horizontal resolution. Depending on the ability of the monitor or display output, the quality of resolution achieved can vary. In this type of setup, both the horizontal and vertical signals are combined on a completely separate wire. This type of synching is called RGBS. A true composite signal is achieved by utilizing four wires. They are colored red, green, blue and a plug for sync which is normally white or yellow in color. Another way to combine signals is called separate sync. In separate sync, the horizontal and vertical signals are each carried on a separate wire. This type of synch is used in RGBHV setups. Separate sync is common in VGA devices such as analog computer monitors. Separate sync requires five different plugs. They are color coded red, green, blue and either a combination of yellow and white, yellow and black, or gray and black plugs.

RGB Cables

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VGA Adapter to TV S-Video RCA Out Cable for PC Video

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วันอังคารที่ 21 กุมภาพันธ์ พ.ศ. 2555

Cables to Connect Computer and Television Together

Online shoppers today are faced with a staggering variety of cable choices when trying to connect their PC to their TV. They may wonder which cables give them the best sound and picture quality, and may also want to know the various options they have to connect their TV and PC together. High Definition Multimedia Interface leads are by far the most common cable of choice in demand at present, but products such as the Toshiba Satellite L300 have a VGA 15 Pin D-Sub socket, and so a different cable type would be needed.

Connect PC to TV using the latest wireless technology

HDMI Cable

If your Desktop, Laptop, Tablet PC or Smartphone, has a USB port or 'socket', there is a multitude of devices available online which will allow you to stream both sound and video content wirelessly from your PC, provided that your Television has a HDMI (High Definition Multimedia Interface) input. Fortunately, nearly all High Definition (HD) TVs on sale in 2012 are retro fitted with a HDMI input, and every new 3D TV is equipped with a HDMI input.

Connect mini USB and micro USB PC to TV wirelessly

Some Laptops, Desktops, Tablet PCs and even Smartphones have mini USB or micro USB ports, and so to stream audio and visual content wirelessly from one of these devices, you would need a micro USB to USB (Type A) converter, or mini USB to USB (Type A) converter to use a Wireless PC to TV streamer.

Connect Apple iPad, iPhone or iPod Touch to HDMI High Definition Television screen

If you want to connect your Apple multimedia device to your TV monitor, you can do this by using an Apple 30-Pin Dock connector to HDMI (Type A) converter along with with a HDMI (Type A) 1.4 lead. This combination of adapter and cable is also compatible with the iPhone 3, 3G, 4, 4S and iPod touch.

The wide availability of product choice can only be seen as a positive thing for the consumer. Due to high competition, consumers have the power to demand ever-increasing levels of durability and transmission quality, at prices as low as 46p for a HDMI cable (the cheapest HDMI cable we have ever come across). It would be best to recommend any form of HDMI (High Definition Multimedia Interface) 1.4 cable from a trusted online retailer.

Are expensive HDMI cables better than cheap ones?

If you have just spent your hard-earned cash on a 42" High Definition TV, you may think that spending loads on a "top-of-the-range" HDMI cable will ensure better image quality, but it is widely regarded that around £9.99 is a sensible amount to spend on a HDMI cable (to strike a good compromise between value and quality), unless you require a cable of more than 3 metres. Longer HDMI cables tend to cost more than £10, but are surely a cost-effective alternative to connecting PC to TV wirelessly.

If you don't know your PC or TV connection type, use an online configurator to search for a PC and TV connection by Make and Model. If you don't know the Make and Model of the PC and TV you want to connect, you can also search by cable connection type. - Connect PC to TV

If your laptop lacks a HDMI input, but has a VGA input, you have two options:

Option one: Buy a VGA (Male) to VGA (Male) cable, a VGA to HDMI adapter set, a HDMI (Male) to HDMI (Male) cable, and a 3.5mm Mini Jack to RCA cable

Option two: If your PC also has a USB socket, use that instead and buy a Wireless PC to TV streaming kit

Option one will cost you nearly the same as the wireless PC to TV streamer, because the VGA to HDMI converter box will set you back at least 39.99.

Most wireless Computer to Television streaming kits are designed to work from a distance of up to 30 feet, so if you are planning to connect PC to TV wirelessly from a large distance, you should use a high quality HDMI cable, VGA cable and HDMI to VGA adapter, along with a 3.5mm Mini Jack to RCA lead.

You will need a 3.5mm Mini Jack to RCA cable when connecting using VGA because VGA does not carry audio signal. VGA cables must be used in conjunction with a 3.5mm Mini Jack to RCA cable when connecting Computer to Television.

How to connect Apple Mac or MacBook to HD TV

If you have a recent Apple MacBook or Mac Desktop, you are likely to have either a Mini DisplayPort input or Apple Thunderbolt input. Most new Mini DisplayPort adapters and cables are compatible with Apple Thunderbolt for connecting Computer to Television, so if you are planning to connect your Mini Displayport or Thunderbolt equipped Apple multimedia interface to your 27" Apple LED screen, you can use a Thunderbolt cable. Like HDMI cables, Thunderbolt also carries audio signal.

If you want to connect your Apple Thunderbolt or Mini DisplayPort (input) Computer, Desktop, Laptop, Netbook or Tablet to your HDMI High Definition Television, you can use a Mini DisplayPort to HDMI converter, or Apple Thunderbolt to HDMI converter.

Some new televisions come equipped with a DVI port (either a DVI-Integrated, DVI-Analogue, or DVI-Digital). DVI cables do not carry audio signal, so need to be used in conjunction with a 3.5mm Mini Jack to RCA cable.

Cables to Connect Computer and Television Together

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