Radio Audio Tester Hardware Platform Design And Realization

Radio set is the basic communication tools in army, its working conditions have adirect effect on reliability of warfare information transfer. Effective testing for radio sebecomes important task currently to ensure radio set works in a normal and activecondition, but ensuring radio set audio signal channel is the premise condition of radioset normal communication, so the testing and analysis for radio set audio is theimportant testing project to measure whether radio set is effective or not in radio setester.At present, HF radio set has been put into practical extensively, but the existing radioset testing devices cannot satisfy the actual needs because of secrets and new techniqueapplication insufficiency. Presently the audio testers in market only aim to conventionaperformance testing of civil products. So this article developed special audio signatesting platform for army radio set.Firstly this paper researched the market's audio testing technology present situationadopted the method basing on FFT, digital signal processing technology.After, analyzed requirements of hardware platform, adopted a design structure oFPGA and ADC. Chose a series of ICs according to design requirements, simulated andverified; re-divided every subunits functions module, expounded each module functionand design methods in detail, then drew principle circuit by Altium tools, designed andprocessed PCB, debugged and produced.The designed hardware meets testing requirements for two kinds, microphone inpuweak signal within 5mV and radio set interface output 100mV~30V strong signal.Finally, has completed the FPGA performance and algorithm on the hardwareplatform. Fast algorithms basing on FFT calculated the audio digital signal, which wassampled and processed by analog to digital converter. FFT converted the time-domainsignal into frequency-domain, calculated the signal performances including audiofrequency, level, signal to noise and distortion ratio and total harmonic distortionbesides, this paper designed audio signal source for audio testing.This paper designed and completed HP radio set audio testing hardware platform andcompleted key algorithms, the platform can test the audio indicators accurately, meeindex testing of active radio, play a practical value in the battlefield and logisticguarantee, and has been used in army.