Get 166-2020 State Primary Standard for the Frequency Deviation Unit

The characteristics of GET 166-2020 State Primary Standard for the frequency deviation unit are specified, as well as methods and instruments for measuring frequency deviation that it employs. The frequency deviation unit is reproduced via direct digital signal synthesis. This method eliminates some sources of error in frequency deviation measurement, which allows the range of carrier and modulation frequencies to be significantly expanded, as well as enabling a 10-fold increase in the maximum reproducible value of the frequency deviation unit without adding to the residual systematic error. The Primary Standard under consideration comprises modern measuring instruments (MIs) employing digital signal analysis: a signal analyzer and a digital storage oscilloscope that can be used to transfer the unit of frequency deviation to reference MIs. The use of these measurement instruments significantly expands GET 166-2020 capabilities. The scope of GET 166-2020 application is considered, which includes modulation analyzers, signal generators, measuring receivers, spectrum/signal analyzers, phase jitter meters, phase noise analyzers, as well as digital modulation generators and analyzers. Finally, the authors present the experimental results of GET 166-2020 studies. The individual error components associated with four independent measurement methods are estimated, with some of the error components eliminated or manifold reduced. The performed comparison of measurement results obtained for the frequency deviation unit using each of the methods indicates their convergence within +/- (0.02-0.05)%.