4 Aug 2016, 7:18pm
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Transmission

For example, the simple action as to bind to a telephone or fax will go to add one ‘ ‘ ganho’ ‘ , that is, the amplitude of the involved electric signal in the connection of the devices will suffer a variation in ‘ ‘ rvore’ ‘ of the line and this factor can intervene with the transmission of the data. A transmitted telephonic pulse in a net always is attenuated, that is, will exist a reduction or loss in its value, therefore it must cover all the wires that are part of the circuit, how much bigger the trip that the telephonic pulse makes through wires of the net, plus it is attenuated. This effect combined with the lack of standard of the connectors and terminadores used in the net of telephonic are the most serious factors in the generation of impedances and harmonic (multiple of the work frequency), that they will harm the transmission of the data (for example, a telephonic point without swims connected, generates a difference of potential in the circuit). A HomePNA net must be drawn taking in consideration the existing telephonic points, that typically will be citizens to a great degree of signals of speed reduction, these provoked through the noises that they also occur in the fortuitous distribution of the topology of the net and for noises of the electromagnetic type produced by equipment as electric tools, warming, air-conditional and devices telephones of mainly low quality. The net must be capable to tolerate the changes in the data-communication characteristics of the line, that occur with a great frequency, decurrent of the equipment used in the telephonic conventional, that has a great variety of changes in the operational characteristics, and if the net correctly will not be drawn, can intervene with the transmission of the data.