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The receiver is the core of distance measuring equipment(DME), and the main functions need to realize include receiving the Gauss shaped interrogation pulse from the aircraft, in order to measure the distance from the aircraft. The dissertation mainly studies the DME receiver technology, using digital and modular design method, dividing it into different modules according to the function, and dividing the design into digital front-end and signal processing section. Among them, digital front-end is composed of RF processing module, semi amplitude demodulation module; the back-end signal processing is composed of coding and decoding module, Morse identification pulse generating module, transmitting pulse priority control module. Testing shows the circuit operates with stable performance and high reliability.

As an important human-machine interaction component in the ship damage control system, the analog display board has a large number of indicator lights arranged on the board. But meanwhile, the indicator lights are in different working states and need to be controlled by multiple driving circuit boards. Thus, the application of RS485 bus communication can effectively solve the problem of communication between the controller side and multiple driving circuit boards. And the multiplexing of output ports on each driving circuit board will be regarded as a pragmatic approach to solve the numerous indicator lights that are in different working states on the board.