Design Of Spectrum Anelesyser Based On DSP

With the development of computer and microelectronics, Spectrum analyzing based on Digital Signal Process (DSP) has been applied in all kinds of fields, and it acts as an important role. But in teaching procession, the effect of teaching was affected because we could not show the spectrum of signal directly and could not afford the expensive spectrum analyzer.Based on above phenomenon, We designed an spectrum analyses system using high capability price ratio DSP chip of TMS320VC5402 of TI corporation. It can acquisite signal and process the data in frequency fields, then show the spectrum of signal in common oscilloscope directly.The main work of design are follows: first we designed DSP-VC5402 development system include the interface of communicating with PC series port and HPI port communicating with PC parallel port; then we developed spectrum analyses software on it and DSP arithmetic for series communicating and software of host and HPI BOOTLOADER program; Finally we Validated the system by JTAG emulator, Then download the program to DSP and observe the spectrum wave by oscilloscope offline.The using of spectrum analyses system is easy and visual, after testing in lab.Only interfacing it between the signal and oscilloscope, then you can observe spectrum of signal. It is infrequent to use spectrum analyzer based on DSP in lab teaching, so we filled up an item of blank. The development system can be used in other DSP development work beside spectrum analyses with its rich resource, so we lay a foundation of farther development.