standard built utilizing quantized voltage, U = (h/2e)nf, where h is the Planck constant, e is the elementary electric charge, n is an integer and f is thefrequency of irradiated electromagnetic wave arising from AC Josephson effect, etalon, mis on realiseeritud kasutades kvantifitseeritud pinget, U = (h/2e)nf, kus h on Plancki konstant, e on elementaarne elektrilaeng, n on täisarv ja f on kiirgatud elektromagnetlaine sagedus, mis tuleneb AC Josephsoni efektist