Design of Digital Acquisition Interface Module for Radar Signals Based on CPLD and DSP

A digital acquisition interface module for radar signals is described which is realizated by using CPLD M4A5-128/64 and DSP TMS320VC5402.The functions and specifications of main devices used are introduced.The level convert circuit of triggering pulse signal and ship heading signal,and radar video signal A/D convert circuit are also discussed.The CPLD logical design and DSP software design is presented.