Precision Differential Sampling Measurements of Low-Frequency Synthesized Sine Waves With an AC Programmable Josephson Voltage Standard

A. Rufenacht, C.J. Burroughs, S.P. Benz, P.D. Dresselhaus, B.C. Waltrip, T.L. Nelson
2009 IEEE Transactions on Instrumentation and Measurement  
We have developed a precision technique to measure sine-wave sources with the use of a quantum-accurate ac programmable Josephson voltage standard. This paper describes a differential method that uses an integrating sampling voltmeter to precisely determine the amplitude and phase of high-purity and low-frequency (a few hundred hertz or less) sine-wave voltages. We have performed a variety of measurements to evaluate this differential technique. After averaging, the uncertainty obtained in the
more » ... etermination of the amplitude of a 1.2 V sine wave at 50 Hz is 0.3 μV/V (type A). Finally, we propose a dual-waveform approach for measuring two precision sine waves with the use of a single Josephson system. Currently, the National Institute of Standards and Technology (NIST) is developing a new calibration system for electrical power measurements based on this technique.
doi:10.1109/tim.2008.2008087 fatcat:7qdnalwfzjezji3ginxjbx2u5y