AC Voltage Measurement Device Based on AC Josephson Quantum Voltage Standard

Based on the pulse driven Josephson arbitrary waveform synthetic voltage standard, a set of measurement device is designed to calibrate AC voltage. The device is mainly composed of AC Josephson quantum voltage standard, phase-locked amplifier, signal generator and supporting measurement software, which realize the AC voltage measurements of 1V(root mean square)at 1kHz with expanded uncertainties (k = 2) of no more than $5.0 \times 10 ^{-6}$.