Catv Signal Monitoring Synthetic Filter Amplifier Circuit Design And Implementation

With the application of the cable television, CATV monitoring work came intobeing. The performance of CATV signal synthesizing filtering and amplifying circuitdirectly influences the smooth development of the CATV monitoring work, andpromotes the further application and development of the cable television industry.The object of this paper is CATV signal synthesizing filtering and amplifyingcircuit in signal monitoring system used in radio and television monitoring stations. Inorder to meet the application requirements, the circuit can perfectly solve the problemsof the spectrum overlap caused by the two-antenna receiving mode and the signalinterruption while the circuit powering off. These two aspects are also the maininnovations of the paper.Firstly, the paper makes an overview about the development CATV and CATVsignal monitoring. On the basis of analysis of the actual application requirements, themain issues and design ideas of the circuit are determined.Secondly, a brief analysis of the basic composition of the CATV signal monitoringsystem circuit and the basic design theory of the CATV signal synthesizing filtering andamplifying circuit in signal monitoring system is made.Thirdly, on the basis of the functional requirements, the design scheme andperformance indicators of the circuit are determined. The specific design of eachfunctional module and the whole circuit in detail are described.Then, after completing the design of schematic and PCB layout, the circuitprototype is manufactured by welding and debugging to the functional modules and thewhole circuit. Then the final test results of the prototype are shown.Finally, after summarizing the function features and performance indicators of thecircuit, improvement programs are put forward with the development trends of theCATV signal synthesizing filtering and amplifying circuit in signal monitoring system.