Additional Features: Flexible resource expander unit for the Agilent 4155 and Agilent HP 4156 2 pulse generator units (PGUs) are available as an option 1 high-power SMU or 2 medium-power SMUs are available as an option 1.6A ground unit included in all Agilent 41501B configurations The Agilent 41501A pA Meter / DC Voltage Source consists of an extremely stable picoampere meter and two programmable DC voltage sources, one of which operates as a ramp and staircase generator as well as a DC source. These features make the unit ideal for making DC characteristic measurements such as leakage current, current-voltage characteristics and quasi-static C-V measurements required by the semiconductor industry for new product development and for improving production yields. It is equally useful in measurements of electronic components and materials to determine leakage currents or insulation resistances.