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Основные метрологические характеристики генераторов на основе метода прямого цифрового синтеза сигналов
Abstract
The principle of operation of generators based on direct digital synthesis (DDS-generators) of signals is described. It is shown that, at the generator output, the signals are generally quasiperiodic. Quasiperiodicity causes a change in the amplitude, period, and appearance of distortions in the output voltage, ie, the appearance of methodological errors. Even with the improvement of the hardware of digital DDS-generators, methodological errors will determine the ultimate metrological characteristics. Calculation of methodical errors is carried out by means of calculation of the signal spectrum.
About the Authors
Ю. Рыбин
Национальный исследовательский Томский политехнический университет
Russian Federation
Russian Federation
Т. Петлина
Национальный исследовательский Томский политехнический университет
Russian Federation
Russian Federation
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Review
For citations:
, . Metrologiya. 2018;(2):49-63. (In Russ.)
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