Stanford Research SR850 DSP Dual Phase Lock-In Amplifier, 1 mHz to 102.4 kHz 

The SR850 is a digital lock-in amplifier based on an innovative DSP (Digital Signal Processing) architecture. The SR850 boasts a number of significant performance advantages over traditional lock-in amplifiers - higher dynamic reserve, lower drift, lower distortion, and dramatically higher phase resolution. In addition, the CRT display and 65,536 point memory make it possible to display and process data in a variety of formats unavailable with conventional lock-ins.

Features: 

• Frequency Range: 1 mHz to 102.4 kHz
• Dynamic reserve: >100 dB
• Phase resolution: 0.001 degree
• Time constants: 10 µs to 30 ks (up to 24 dB/oct rolloff)
• Auto-gain, -phase, -reserve and -offset
• Data logging (up to 65k samples)
• Smoothing, curve fitting & statistics
• 3.5 inch disk drive
• GPIB (IEEE-488) and RS-232 interfaces
• Output connectors: BNC(f)
• 100, 120/220, 240 Vac; 50/60 Hz operation
• Weight: 40 lb; Size: 159 mm (6.25 in)H x 432 mm (17.0 in)W x 483 mm (19.5 in)D