The Design And Development Of The Console Named ND120

Digital Program Exchange System is one of the most importantDevices in power industry. At present,there are all kinds of Digital Program Exchange Systems, but these devices are of the following faults:1 relatively short propagation distance.2 relatively high bit error rate.3 single interface.Therefore,Beijing NetInfo Technology Co.,ltd decides to reform the one named ND120. I am responsible of devising a newconsole which is the key component of ND120.The control mechanism of the new console is a Microchip named 8051; The interface is RS-232; Signals are transmitted viaOptical Fibre; Channel encoding mode is HEC.The Chapter one of the thesis introduces the developmentstatus of the present Digital Program Exchange System and themain task of devising a new console; Chapter Two gives the relevant theories about Channel Encoding; Chapter Three simplyintroduces Digital Program Exchange System named ND120; Chapter Four presents how to find out relevant data; Chapter Five andSix describe in detail the Hardware structure and Software structure of the new console respectively; Chapter Seven demonstrates in detail the new interface of this console.