Transmission media is a media that connects between the sender and receiver of information (data), because of the distance, then the first data is converted into code / cue, and this signals to be manipulated in various ways to be converted back into data.
Usefulness of transmission media
Transmission mediaused in some electronic equipment to connect between the sender and receiver to be able to exchange data. Some electronic devices, such as telephones, computers, television, and radio transmission media need to be able to receive data. As in the receiver, the transmission mediaused to connect two phones are wired. Every electronic device has a transmission mediawhich vary in data delivery.
Characteristics of transmission media
Characteristics of transmission media is dependent on:
- Types of electronic devices
- Data used by electronic devices such
- The level of effectiveness in the delivery of data
- Size of data transmitted
This type of transmission media
Guided Transmission Media
Guided transmission media or guided transmission mediais a network that uses a cable system.
Characteristics of transmission media is dependent on:
- Types of electronic devices
- Data used by electronic devices such
- The level of effectiveness in the delivery of data
- Size of data transmitted
This type of transmission media
Guided Transmission Media
Guided transmission media or guided transmission mediais a network that uses a cable system.
Twisted Pair Cable
Twisted pair cable or twisted pair cable consists of two conductors are coupled with the aim to reduce or eliminate interference from the outside like lektromagnetik electromagnetic radiation from unshielded twisted-pair cable (UTP), and crosstalk that occurs between adjacent wires. There are two kinds of Twisted Pair Cable, the STP and UTP cable. STP cable (Shielded Twisted Pair) is one type of cable used in computer networks. This cable contains two pairs of wires (four wires) of each twisted pair. STP cable is more resistant to interference disebebkan wires are bent position. At STP cable attenuation to increase at high frequencies giving rise to crosstalk and noise signals. UTP (Unshielded Twisted Pair) is widely used in computer network installation. This cable contains four pairs of twisted-pair wires each (twisted). These cables are not equipped with protective (unshilded). UTP cable is easy to install, small size, and price is cheaper than other types of media. UTP cables are particularly vulnerable to the effects of electrical interference from the surrounding media.
Twisted pair cable or twisted pair cable consists of two conductors are coupled with the aim to reduce or eliminate interference from the outside like lektromagnetik electromagnetic radiation from unshielded twisted-pair cable (UTP), and crosstalk that occurs between adjacent wires. There are two kinds of Twisted Pair Cable, the STP and UTP cable. STP cable (Shielded Twisted Pair) is one type of cable used in computer networks. This cable contains two pairs of wires (four wires) of each twisted pair. STP cable is more resistant to interference disebebkan wires are bent position. At STP cable attenuation to increase at high frequencies giving rise to crosstalk and noise signals. UTP (Unshielded Twisted Pair) is widely used in computer network installation. This cable contains four pairs of twisted-pair wires each (twisted). These cables are not equipped with protective (unshilded). UTP cable is easy to install, small size, and price is cheaper than other types of media. UTP cables are particularly vulnerable to the effects of electrical interference from the surrounding media.
Coaxial Cable
Coaxial cable is a type of cable that uses two conductors. These cables are widely used for transmitting high frequency signals began to 300 kHz and above. Because of its ability to deliver such high frequencies, then the transmission system using coaxial cable has a large enough channel capacity. There are several types of coaxial cable, which is thick coaxial cab le (having a large diameter) and thin coaxial cable (has a smaller diameter). Excellence is the coaxial cable can be used to channel information for up to 900 telephone channels, can be planted in the ground so that the lower maintenance costs, because it uses the small isolation cover the possibility of interference with other systems. The downside is the coaxial cable attenuation has a relatively large so that for long-distance relationship repeater-repeater should be installed, if the cable is installed above ground, vulnerable to physical disturbances that can result in disconnection.
Coaxial cable is a type of cable that uses two conductors. These cables are widely used for transmitting high frequency signals began to 300 kHz and above. Because of its ability to deliver such high frequencies, then the transmission system using coaxial cable has a large enough channel capacity. There are several types of coaxial cable, which is thick coaxial cab le (having a large diameter) and thin coaxial cable (has a smaller diameter). Excellence is the coaxial cable can be used to channel information for up to 900 telephone channels, can be planted in the ground so that the lower maintenance costs, because it uses the small isolation cover the possibility of interference with other systems. The downside is the coaxial cable attenuation has a relatively large so that for long-distance relationship repeater-repeater should be installed, if the cable is installed above ground, vulnerable to physical disturbances that can result in disconnection.
Fiber Optic
Fiber optics is the transmission line made of glass or plastic that is used to transmit light signals from one place to another. Based on the transmission mode optical fiber that is used consist of Step Index Multimode, Graded Index Multimode and singlemode Step Index. Advantages of fiber optics is cheaper, more streamlined shape, a larger transmission capacity, less signal is lost, the data is converted into light signals resulting in faster, less power required, and non-flammable. Weaknesses include the cost of optical fiber is expensive for the equipment, requiring conversion of electrical data into light and vice versa is complicated, requiring special equipment in use and installation procedures, as well as for complex repairs require skilled manpower in this field. In addition to an advantage, its not conduct electricity is also a weakness because it requires an external power tools.
Unguided Transmission Media
Unguided transmission media or not the transmission mediais a network that uses guided wave system.
Fiber optics is the transmission line made of glass or plastic that is used to transmit light signals from one place to another. Based on the transmission mode optical fiber that is used consist of Step Index Multimode, Graded Index Multimode and singlemode Step Index. Advantages of fiber optics is cheaper, more streamlined shape, a larger transmission capacity, less signal is lost, the data is converted into light signals resulting in faster, less power required, and non-flammable. Weaknesses include the cost of optical fiber is expensive for the equipment, requiring conversion of electrical data into light and vice versa is complicated, requiring special equipment in use and installation procedures, as well as for complex repairs require skilled manpower in this field. In addition to an advantage, its not conduct electricity is also a weakness because it requires an external power tools.
Unguided Transmission Media
Unguided transmission media or not the transmission mediais a network that uses guided wave system.
Microwaves
Microwave (microwave) is a form of radio that uses high frequency (in units of gigahertz), which covers the area UHF, SHF and EHF. Microwaves are widely used in the MAN network system, internet cafe and internet service provider (ISP). The advantage of using microwaves is the acquisition between the tower is not so necessary, can carry large amounts of data, low cost because each tower antenna does not require a large area, high frequency or short wave because it only requires a small antenna. Weaknesses microwaves are susceptible to weather such as rain and easily influenced planes flying over it.
Satellite
The satellite is transmitting media whose main function receives a signal from the earth station and forward it to another earth station. Satellites orbiting at an altitude of 36,000 km above the Earth has an orbital angular velocity equal to the orbital velocity of the earth. This causes the satellite to be relatively stationary position of the Earth (geostationary), if the satellites are orbiting above the equator. In principle, by placing three geostationary satellites in the right position to reach the entire surface of the earth. Advantages satellite is cheaper than by holding an intercontinental cable, can reach the Earth's surface area, including remote areas with low population, the growing telecommunications traffic between continents makes satellite systems commercially attractive enough. The drawback is the limited technology for the use of satellite antennas with a large size, investment and insurance costs are still expensive satellites, atmospheric losses are great for frequencies above 30 GHz limit the use of the carrier frequency.
Radio waves
Radio waves are the transmission mediathat can be used to transmit voice or data. Excess transmission of radio waves are able to send a signal to the position of arbitrary (not necessarily straight) and it is possible in a state of motion. Frequency of use between 3 KHz to 300 GHz. The radio waves used on VHF and UHF bands: 30 MHz to 1 GHz includes an FM radio and UHF and VHF television. Used for digital data communication packet radio.
Infra red
Infrared is used for communication at close range, with a speed of 4 Mbps. In its use to control remotely, for example, the remote control at the television and other electronic devices. Advantages infrared is immune to radio interference and elekromagnetik, infrared easy to make and inexpensive, easy installation, easily removable, higher security than radio waves. The downside is infrared finite distance, can not penetrate the wall, there should be a straight path from the sender and receiver, can not be used outdoors because it will be disturbed by the light of the sun.
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