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NIST Sampling System for Accurate AC Waveform Parameter Measurements



David I. Bergman


This paper summarizes efforts at the National Institute of Standards and Technology to develop a waveform sampling and digitizing system with accuracy comparable to that of an ac-dc thermal transfer standard for ac voltage measurements over the frequency range of 10 Hz to 1 MHz. In the frequency range from 1 kHz to 1 MHz, the sampler''s gain flatness is better than that available from the best commercial digital multimeter. In ac-ac comparisons referenced to 1 kHz, the system agrees with a NIST-calibrated thermal transfer standard to within 17 uV/V from 20 Hz to 100 kHz for measurements made at both 1 V and 0.1 V. The sampler?s excellent dynamic linearity and flat input impedance are also discussed.
IEEE Transactions on Instrumentation and Measurement
Report Number


Analog-digital conversion, Frequency response, Gain measurement, Markov processes, Measurement standards, Signal sampling


Bergman, D. (2007), NIST Sampling System for Accurate AC Waveform Parameter Measurements, IEEE Transactions on Instrumentation and Measurement, [online], (Accessed May 19, 2024)


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Created April 1, 2007, Updated January 27, 2020