一种调制度测量仪的数字化精确评价与溯源方法

doi:10.3969/j.issn.1000-1158.2021.07.15

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Abstract 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.

Key words： metrology modulation meters demodulation AM FM PM evaluation calibration

Received: 11 January 2020 Published: 15 July 2021

PACS:

TB973

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	Articles by authors
	LIANG Zhi-guo
	HE Zhao
	MIAO Jing-yuan
	GUO Xiao-tao
	ZHANG Yi-chi

Cite this article:

LIANG Zhi-guo,HE Zhao,MIAO Jing-yuan, et al. A Novel Digitizing Evaluation and Traceability Method of Modulation Meters[J]. Acta Metrologica Sinica, 2021, 42(7): 930-936.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.07.15 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I7/930

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