SR860 Lock-In Amplifier with 1 mHz to 500 kHz Frequency Range, RS-232 Interfaces, and Touchscreen Data Display by SRS Stanford Research Systems

• 1 mHz to 500 kHz frequency range
• Touchscreen data display
• 1 µs to 30 ks time constants
• Low noise voltage & current inputs
• High bandwidth outputs
• HDMI video output
• 10 MHz timebase input & output
• GPIB, RS-232, Ethernet & USB connectivity

Lock-in performance starts at the front end. The SR860 front end offers both state-of-the-art voltage and current input amplifiers. The voltage input is a switchable single-ended/differential JFET-pair amplifier with 2.5 nV/√Hz of noise at 1 kHz and under 10 nV/√Hz of noise at 10 Hz. The voltage input has a 10 MΩ input impedance and can be AC or DC coupled.

The SR860's built-in current amplifier represents a significant improvement over previous designs. The current input range is selectable from 1μA or 10 nA. The 1μA range has 400 kHz of bandwidth and 130 fA/√Hz of noise, while the 10 nA range offers 2 kHz of bandwidth and 13 fA/√Hz of noise.

The SR860 is compatible with the complete range of specialized pre-amplifiers offered by SRS, including the SR550 (FET input), SR552 (BJT input), SR554 (transformer input), SR555 (120 kHz current amp), and SR556 (low-noise current amp).

The SR860 comes standard with comprehensive remote interfaces including GPIB (IEEE488.2), RS-232, USB (Test and Measurement Class), and Ethernet (VXI-11 and telnet). The instrument hosts its own web server for remote monitoring and control via browser. A front-panel USB port allows data and screenshots to be saved to USB flash drives in comma-delimited or MATLAB-compatible .MAT formats.