The BK Precision 9833B Programmable AC Power Source, 150V/30A, 300V/15A, 190-250 VAC Line Input provides high performance and low total harmonic distortion in a 3U form factor. The addition of positive and negative DC offset voltages expands the AC capabilities to operate in DC and AC+DC output coupling modes. The user can select built-in and user-defined harmonic waveforms or select from standard sine, square or clipped sine outputs. The high output current crest factor and low input resistance are suitable for high inrush current measurements when evaluating capacitive or inductive loads. Adjustable AC/DC voltage levels, frequency and timing parameters allow for simulation of voltage drops and periodic power surges and sags. Step, pulse and list modes are used to generate complex power line disturbance simulations. Select from built-in waveforms or generate user-defined waveforms with the included PC software or by connecting an arbitrary waveform generator to the instrument's analog input. 3-Phase power can be achieved by connecting 3 units of the same model in a master and slave configuration using the optional TL983P 3-Phase sync adapters, sold separately. The numeric keys and rotary knob provide a convenient interface for setting output parameters quickly and precisely. All measurements and setting values are concurrently displayed on the screen including a graphical display of the output waveform. Up to 100 instrument settings can be saved and recalled to and from internal storage memory. Save screenshots and save /recall settings to the USB host interface. To further extend the capabilities of the 9832P, custom waveforms can be applied to the analog BNC input. The custom waveform can be created using WaveXpressTM, a comprehensive stand-alone B&K Precision application, allowing users to easily generate, edit, and upload custom waveforms to an arbitrary waveform generator, which then drives the AC power source output. WaveXpressTM allows users to define waveforms by importing a csv file, define it freehand on the computer, or by importing a real-world waveform captured on a digital oscilloscope.