... and take the load regulation of voltage, current, phase and frequency of the power factor;• To be ... a week of the wave kneading, signal output without filter, precise output waveform, the harmonic output precision, ... 8 PPM / °CLong-term stability: 60 PPM/year Phase angleAdjusting range: 0 ~ 359.99°Resolution: 0.01° ... conditions: -30 °C ~ 60 °C GF101 Program-controlled Single-phase Standard Power Source