What is electrical communication system?
What is electrical communication system ? Electrical communication is reliable and economical ;communication technology is allievating the energy crisis by trading information processing for a more rational use of energy resources. Some examples:- 1. Teleconferring 2.Telebanking 3.Teleshopping . Communication system :- The source originates a message ,such as a human voice ,a television picter ,a teletype message or a delta . If the data is non electric (human voice,teletype message ,television picture), it must be converted by an input transducer into an electrical wave form referred to as the baseband signal or a message singnal. THE transmitter modifies the baseband signal for efficient transmission . THE channel is a medium -such as wire ,coaxial cable ,a waveguide ,an optical fiber ,or a radio link through which the trasnsmitter is sent .