PRECISION MEASUREMENT APPARATUS OF CAR AUDIO SYSTEM USING PERSONAL COMPUTER

摘要

PURPOSE: a kind of precision measurement apparatus automobile audio system using personal computer passes through artificial personal computer to eliminate measurement error. CONSTITUTION: the equipment includes computer settings measurement title, measure sequence, pass through user's measuring condition, and control signal is generated to record measurement result file, bus unit is for connecting computer and external equipment, FM/AM signal generators, there is modulation rate and limiting value for generating FM signals or amplitude-modulated signal, according to the form of control signal, the computer kind FM signal generator provides reference frequency, virtual output end is without being attached to audio system speakers, audio analysis device, for measuring AC, DC, distortion, voice trembles to be reported to computer and passes through bus system with speed broadcasting and offer measurement result, wave is measured from audio system with wave measuring apparatus. It is thereby possible to measure characteristic audio system, correctly.