Electromagnetic Interference

A detailed Summary of Electromagnetic Interference

A network is an intricately connected system of objects or people. Networks are all around us, even inside us. Your own nervous system and cardiovascular system are networks. These networks consist of hosts, servers, routers, switches, and obviously the medium that connects them, the cable. The host parts of the network are the computers that are on the network needing information or sending information. They are connected to the medium by way of a network interface card or a NIC. From this point, data sent from the computer and through the NIC goes down the medium and will either hit a switch, hub, router, server, or modem. The cable needs to be able to transmit data in a fast way to be able to keep up with the demand. When you are online and try to access a webpage, the computer has to interpret the information such as the web address and convert it into a binary number to be sent out over the medium. The NIC does this conversion by sending a binary "1" over the line as a +5 Volts and a binary "0" as O Volts. As you can see the two different signals are only off by 5 volts. This is why it is very important that EMI does not occur in a network.

EMI, simply put, is an unwanted electrically transmitted signal. There are a number of ways to limit EMI and RFI. One way is to increase the size of the conductor wires. Another way is to improve the type of insulating material used. However, such changes increase the size and cost of the cable faster than they improve its quality. Therefore, it is more typical for network designers to specify a cable of good quality, and to provide specifications for the maximum recommended cable length between nodes.

The main kind of medium that is used today in computer data networks is EIA/TIA certified Category 5 unshielded twisted pair or UTP cable. This cable is made up of 4 twisted pairs of wires. The twists in the pairs help reduce a similar problem to EMI called crosstalk. The wire with in the different pairs is 24 gauge copper. Category 5 describes network cabling that consists of four twisted pairs of copper wire terminated by RJ45 connectors. Cat-5 cabling supports frequencies up to 100 MHz and speeds up to 1000 Mbps. Cat-5 is based on the EIA/TIA 568 Commercial Building Telecommunications Wiring Standard developed by the Electronics Industries Ass

Some common words found in the essay are:
EMI RFI, , Industry Association, Mbps Cat-5, twisted pairs, Wiring Standard, magnetic fields, wire pairs, Industries Association, wire wires electrical, wires electrical circuit, emi rfi, current flows wire, current flows, flows wire, increase size, category 5, voltage source, electrical circuit,

Approximate Word count = 776
Approximate Pages = 3 (250 words per page double spaced)

Category: Technology

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Electromagnetic Interference

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