Keysight 6813C/230/831 Performance AC Power Source: 100 VA, 1-phase AC power source 30 V to 300 V output voltage range 45 Hz to 500 Hz output frequency range 0.01% voltage regulation and 0.01% frequency regulation Built-in waveform generator with 16 standard waveforms and 10 user-defined waveforms GPIB, USB, and LAN interfaces