Attenuation Effects on Data Transmitted through Cable :: essays research papers

fading Effects on information Transmitted by means of Cable analysis fading refers to any reduction in the strength of a signal. Attenuation occurs with digital or analog signals. Attenuation is the end result of signals macrocosm transmitted extended distances. Attenuation is usually expressed in units called decibels (dBs). The pipeline type will determine at what point along the space of the parentage signal degradation occurs. Repeaters can be inserted along the length of the cable to boost the signal strength which increases the maximum attainable position of data transmitted though the cable.Attenuation Effects on Data Transmitted through Cable     The majority of attenuation in cajole cable comes from resistive losses in the cables metallic conductors. Temperature also has effect the resistivity of the conducting surface. Resistivity is a "bulk property of stuff describing how well up that material inhibits received flow. This is slightly different from resistance, which is not a somatogenic property. If one considers current flowing through a unit closure of material (say, a solid metal cube that measures 1 verse on each side), resistivity is defined as the voltage calculated across the unit cube length (V/m) divided by the current flowing through the unit cubes cross sectional area (I/m2). This results in units of Ohm m2/m or Ohm-m." University of British Columbia Geophysical Inversion Facility     Temperature affects the operation of electrons in the material. When a signal voltage is passed through a fit out the electrons collides with the atoms in the material. If more atoms are allowed collide with electrons, the greater the frictional resistance, which affects the cable ability to conduct (allow data to pass through the cable). Temperature causes the atoms with in the material to move. Increasing the temperature causes the atoms to jiggle which causes frequent collations with ele ctrons. The opposite is true when the temperature is dismayed.      Attenuation is a function of the frequency of the signal, and the length and physical structure of the cable itself. Specifically, it depends on     The diameter of the inner conductor as the diameter of the conductor increases, attenuation decreases.      The composition of the outer conductor the more effective the screening action, the lower the attenuation.      The nature of the dielectric the lower its constant dielectric, the lower the attenuation. Therefore, an expanded dielectric supplies, at any given diameter, values of attenuation lower than a solid dielectric. Since the type of cable, the temperature, and the rate at which data is being passed through the cables are constant, the length of the cable is the only factor that affects the attenuation in the two cables.