The state primary standard of the frequency deviation unit GET 166-2020

Abstract

The article provides a description of specifi cations of the State primary standard of the frequency deviation, methods and means for measurement frequency deviation, which used at standard. A direct digital signal synthesis method has been implemented to reproduce the frequency deviation unit. This method is devoid of a number of sources of errors in measuring frequency deviation and allows you to signifi cantly expand the ranges of carrier and modulating frequencies, as well as increase the maximum reproducible value of the frequency deviation unit by 10 times without increasing the non-excluded systematic error. The primary standard includes modern measuring instruments based on digital signal analysis - a signal analyzer and a digital storage oscilloscope, which allow transmitting a unit of frequency deviation to reference measuring instruments and signifi cantly expand the capabilities of the primary standard. Are given experimental investigations results of improved standard. The scope of application of the State Primary Standard of the Frequency Deviation Unit GET 166-2020 is considered, covering modulation meters, signal generators, measuring receivers, spectrum/signal analyzers, phase jitter meters, phase noise analyzers, generators and analyzers of digital modulation types. Experimental results of studies of GET 166-2020 are presented. The partial components of the measurement errors of the four independent measurement methods used are estimated, some of the components of the errors are excluded or reduced many times. Comparison of the measurement results by each of the methods used indicates the convergence of the measurement results of the frequency deviation unit within ±(0.02...0.05) %.