Super User Specifications Compliance: ±12 V Control voltage: ±10 V EIS measurement: 3 MHz (1%, 1°) 7 MHz (3%, 3°) Current ranges: 500 mA to 1 µA (10 nA with gain) Current resolution 760 fA (standard board) Low current: 6 ranges from 100 nA to 1 pA with resolution to 76 aA Floating mode Analog filtering Calibration board Full stability control mode (9 bandwidths)