... and DC voltage, current standard resource of standard resource. 2. Have calibration function, which can according to the standard ... DC analog output of digital instrument. 5. To generate containing 2 ~ 31 harmonic wave distortion, the harmonic number, number, ... 200 Ω, 200 ~ 400 Ω, 0 ~ 2 K Ω, 2 K Ω ~ 4 K Ω, 0 ~ 20 K Ω, 20 K Ω ~ 40 K Ω, 0 ~ 200 K Ω, 200 K Ω ~ 400 K Ω, 0 ~ 2 M Ω, 2 M Ω ~ 4 M Ω; Fineness ...