Research on Harmonic Wave Calibration Method of Spectrum Analyzer and Signal Generator
The importance of harmonic wave calibration and measurement of signal generator and spectrum analyzer is explained. It is pointed out that the measurement method of the second harmonic distortion in the existing calibration specification of the spectrum analyzer is not perfect,and the problem of the measurement result deviation is large when using the spectrum analyzer to calibrate the second harmonic of the signal generator. Through the analysis of the test results of different types of spectrum analyzers under different settings,it is concluded that when using many existing mainstream spectrum analyzers to measure harmonics,there will be great deviation of measurement results due to the improper setting of the attenuator. According to the analysis of the results,a large part of spectrum analyzers are not good enough at signal analysis,and can only increase the value of the attenuator to make the test results close to the actual value. Combined with the product specifications and experimental results,the modified method enables different types of spectrum analyzers to accurately measure the actual value of the second harmonic. For example,the results obtained by the existing measurement method of N9000B is 7.0～14.3 dB higher than the actual value.
signal generatorspectrum analyzerharmoniccalibration
万方数据
维普
