A Design of Frequency Response Analyzer Based on LabVIEW

Frequency response analysis has a wide usage as a method of system analysis. A frequency response analyzer based on LabVIEW is introduced in this paper. Compared with the traditional spectrum analyzer, it has many advantages such as a higher ratio of performance to price, wide usage, easy upgrade in performance, etc. The software and hardware structures of a frequency response analyzer are given, and its program realization is expounded in detail. Comparison with standard instrument has been carried out. Experiments show that the average amplitude error of this analyzer gets to 0.06 dB and the average phase error reaches 0.09°, which proves the analyzer credible in both precision and performance.