Super User Specifications SVP Electronics Signal chain: Phase sensitive detection using microprocessor controlled lock-in amplifier with digital dual phase oscillator and differential electrometer input. Lock-in amplifier Software controllable gain range (1 – 105). Output time constant: 0.1, 1, 10 s Differential electrometer 1015 Ohms input impedance. Decade gain ranges: 0 to 80 dB. Common mode range: ±12 V Vibration actuator One dimensional low voltage piezo-electric actuator Vibration amplitude Software set from 1 – 30 μm perpendicular to sample surface Electrochemical sensitivity Better than 5 μA/cm² (using standard PIS test approach) Positioning system specifications Stepper Motors Scan Range (x,y,z): 110 mm x 110 mm x 110 mm Minimal step size on all axes: 20 nm Closed loop positioning linear zero hysteresis encoder with direct real-time readout of displacement in x, y and z Linear position encoder resolution: 20 nm. Max. scan speed: 10 mm/s Measurement resolution: 32-bit decoder @ up to 40 MHz Piezoelectric element (for z axis only) Vibration range 20 nm – 2 µm peak to peak with 1 nm increments Min. vibration resolution: 0.12 nm calculated (16-bit DAC on 4 µm) Piezo crystal extension: 100 µm Positioning resolution: 0.09 nm calculated (20-bit DAC on 100 µm)
