Introduction to Computers Coaxial Cables

Network Cabling We have a number of different options for network media. Each of them will provide a different set of advantages and disadvantages, and as such, each will be best suited for different uses When talking about bounded media, we have coaxial cable, which is usually used for cable TV, twisted pairs which is used very often for local networks, and fiber optic cable which is typically used when a lot of bandwidth is needed

Coaxial Cables A coaxial cable uses a single conductive wire in order to send signals from one device to another. This wire will be protected by a series of layers to make sure that the signal goes through the network correctly Twisted pair cabling is used more often in a home or office situation, but there are still benefits to using coaxial cabling that keep it relevant

Cable Construction The central conductor is usually copper or tin coated copper. This will actually transfer the media The dielectric medium is usually made out of PVC, and insulates the conductor The outer mesh conductor grounds the cable and provides protection from electromagnetic Interference, and from physical damage The Insulating Jacket is usually PVC as well, and protects the wire from physical damage

Coaxial Cable Types Depending on a number of properties of a coaxial cable’s construction we can separate coaxial cables into separate grades Different grades of cable will have completely different specifications, and mixing them together can cause signal loss and other issues In this class, we should know about two grades of cable - RG59 is typically used for video transmission in CCTV systems. They also used to be used quite a bit to transmit satellite and cable TV broadcasts, though they aren't used much anymore because they lose a lot of signal quality over long distances RG6 coaxial cables are used for cable televisions, satellite television, and cable modems. They are constructed with between one and four layers of shielding. In addition, the internal wire is typically made of a solid copper. RG6 cables have much lower signal loss over long distances than RG59, resulting in a higher quality signal

Coaxial Connectors BNC is used to connect coaxial ethernet together. They are molded onto the cable and tend to be more expensive F-Type is usually used for TV connections. It is threaded and screws onto the exterior of the cable. These can also be used to connect to a cable modem

Coaxial Cable Advantages and Disadvantages Physically resistant to damage and electromagnetic interference because of the outer conductor Relatively expensive Relatively thick Less flexible and harder to install Modern networking standards do not support coaxial cables

How to Terminate Coaxial Cable - Video https://www.youtube.com/watch?v=v3JPRIOhQvU

How to Terminate Coaxial Cable - Article http://www.homedepot.com/c/how_to_crimp_a_connector_onto_a_cable_ht_pg_el