一种调制度测量仪的数字化精确评价与溯源方法

A Novel Digitizing Evaluation and Traceability Method of Modulation Meters

提出一种调制度测量仪校准方法,对低频载波情况,直接使用数字示波器进行采集测量,用软件无线电方式解调分析,获得调制域参数。对高频载波情况,首先用下变频技术将其转换成低频载波情况,然后进行测量、解调分析,并给出了详细过程。以此方式,将调制度测量仪的量值溯源到数字示波器的采样速率和幅度上,从而达到校准调制度测量仪的目的。在一种具体型号的仪器上所做的校准验证实验,验证了所述方法的有效性与可行性。

For the modulation measuring instrument,a calibration method is proposed,which includes directly using a digital oscilloscope for signal acquisition and measurement in the case of low-frequency carrier,and performing software demodulation analysis to obtain the modulation domain parameters.For the high-frequency carrier case,it is first converted to a low-frequency carrier case using down-conversion frequency technology,and then measured and analyzed.All the courses are discussed in details.In this way,the measurement value of the modulation domain instrument can be traced to the sampling rate and amplitude of the digital oscilloscopes,so as to achieve the purpose of calibrating the modulation meters.Calibration verification experiments performed on a specific type of instrument validate the effectiveness and feasibility of the method described herein.