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This paper describes the investigation of the influence of harmonics in a signal that is measured by using an AC quantum voltmeter. Equations for parameters of the signal being measured, such as amplitude of the fundamental frequency that depends on the sampling frequency and harmonics are presented.
An AC quantum voltmeter has been developed for precision AC voltage measurements into the kHz range. A special sub-sampling technique is used such that no information of the AC voltage under test is lost. A comparison of the AC quantum voltmeter and an ultra-stable precision waveform generator has been performed. The Allan deviation analysis demonstrates a voltage output stability of 2 × 10−8 in 1...
A Voltage Calibrator based on a 10-V programmable Josephson Array that is simple to use, provides DC and AC calibration up to kHz range for industry-common equipment, and ensures direct traceability to a quantum-based standard, is under development. This device has proven to excel conventional DC standard systems and will extend into low frequency AC range, thereby making itself a practical and robust...
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