Sensitivity 100nV to 500mV Frequency range 0.5Hz to 200kHz Input mode Ground line may be switch-floated. Input impedence 100M ohm//40pF Input referred noise Less than 5nV/√Hz (at 1kHz) Reference mode AUTO, INT, EXT, EXT2F Phase adjustment Not required Time constant 1.25ms to 125s, 6dB/oct or 12dB/oct Dynamic reserve Maximum 60dB DC output Acosφ, Asinφ, A, φ, NOISE Power requirements AC100V, 120V, 220V or 240V switchable Dimensions(mm) 480(W) X 149(H) X 500(D) Weight approx.20kg OPT01 Ratio Meter