A DAQ Board Based Logic Analyzer Design

Logic analyzer is always to be used on digital system or MPU, Its normal price is expensive. A kind of Logic analyzer based on virtual instrument is introduced. The system is constituted of a DAQ card, an all-purpose computer and a design platform of NI LabVIEW 8.2. The Logic analyzer has 8 input channels. Its signal is triggered by data sequence. The selective signal can be showed by state table and timing waveform at same time. The test of the system indicates that the instrument has multiple function, that is collection, saving, judge and management. The system is credible and steady. But there is farther research work to be done on it.