The Keysight 663xA Series of Single Output Linear System Power Supplies deliver a high performing output with a complete set of programmable functions and are enhanced for systems applications. The current and voltage output on these power supplies can be programmed for CC or CV operation. Several models in the series also have the capability of sinking current, whereas the other models can simply source current. The Keysight 663xA Series has an HP-IB interface, through which many functions can be programmed, such as: current and voltage output, self test, software calibration, overvoltage and overcurrent protection, fault codes, programming error codes, and various other functions.