I Abstract Through the research of data-acquiring technique a suit of programmable telemetry signal acquisition and encoding system based on DSP(Digital Signal Processing) and plex Programmable Logic Device) is designed. A basic PCM system is introduced in detail then plete technique project is brought forward according to this system’s requirement. This system is constituted by four modules analog signals acquisition module digital signals acquisition module CPLD control module and central DSP Digital Signal Processor(DSP) is the brain of the system and analog signals and digital signals are acquired stored and handled by DSP at last a standard serial PCM data is conversion circuits and control signals that other modules require are produced by CPLD. Aanalog signals acquisition module and digital signals acquisition module are the interface between the system and the external signals. The DSP chip that the system select is TMS320VC5409 and it’s high-speed operation capacity meets the system’s on-chip peripherals in DSP Multichannel Buffered Serial Port(McBSP) and Direct Memory Access(DMA)