RENT Stanford Research Systems SR850 DSP Lock-In Amplifier (call for availability)
Introducing the Stanford Research Systems SR850 DSP Lock-In Amplifier, an advanced tool designed with innovative Digital Signal Processing (DSP) architecture. This exceptional device offers notable performance benefits over traditional lock-ins, including enhanced dynamic reserve, minimized drift, reduced distortion, and superior phase resolution. The built-in CRT display and extensive 65,536 points of memory enable versatile data display and processing options that are simply unattainable with standard models.
- Frequency Range: 1 mHz to 102.4 kHz
- Phase Resolution: 0.001 degree
- Time Constants: Adjustable from 10 µs to 30 ks (up to 24 dB/oct rolloff)
- Auto Features: Auto-gain, -phase, -reserve, and -offset
- Data Logging: Up to 65k samples with smoothing, curve fitting, and statistical analysis
- Connectivity: GPIB, RS-232, and 3.5" disk drive for seamless data handling
- Digital Precision:
- 18-bit A/D Converter at input
- High-Speed DSP Chip for digitally synthesizing the reference oscillator and implementing precise mathematical calculations
- Digital Flexibility: 7" CRT display supporting a variety of display options
- Input Channel:
- Differential input with 6 nV/vHz input noise
- Input impedance: 10 MO, minimum full-scale input voltage sensitivity: 2 nV
- No need for tracking band-pass filter at input
- Reference Channel:
- Can utilize an externally applied sine or square wave, or an internal digitally synthesized reference
- Internal source boasts minimal reference phase noise, available for fixed or swept operation
- High Dynamic Reserve:
- Unmatched 100 dB dynamic reserve without compromising stability, accuracy, or introducing analog band-pass filter noise
- Traces and Displays:
- Storage for up to four user-defined traces with real-time operations
- Display data visually with bar graphs, strip charts, and polar plots
- Autoscale feature for quick optimization of display settings
- Configurable screen formats, including single large or dual display
- Convenient Auto Measurements:
- Quick access auto functions for gain, phase, dynamic reserve, and display scaling
- Streamlined configuration process utilizing auto options
- Auxiliary A/Ds and D/As:
- Four rear-panel A/D inputs for external signals; values incorporated into SR850 trace definitions
- Four D/A outputs available for fixed or synchronized voltage levels
- Analysis Features:
- Savitsky-Golay smoothing and statistical metrics for trace regions
- Curve fitting capabilities for diverse data sets, including linear and Gaussian fits
- Trace calculator enables arithmetic and trigonometric operations on trace data
- Interfaces and Hardcopies:
- Standard RS-232 and GPIB interfaces for comprehensive control and querying
- Hardcopy options include screen dumps to printers and plots to HP-GL compatible devices
- Signal Channel:
- Voltage Inputs: Single-ended or differential, with sensitivities ranging from 2 nV to 1 V
- Current Input: Options for 106 or 108 V/A
- Input Impedance: 10 MO + 25 pF for voltage inputs; 1 kO for current
- Noise Levels: 6 nV/vHz at 1 kHz; down to 0.013 pA/vHz at 100 Hz for current inputs
- Reference Channel Specs:
- Frequency Range: 0.001 Hz to 102.4 kHz with reference input capabilities
- Exceptional phase accuracy and low noise levels
- Phase drift kept below 0.01°/°C below 10 kHz
- Demodulator Performance:
- Highly stable outputs with digital outputs showing no drift
- Offset adjustable by ±100 % and can expand up to 256×
- Internal Oscillator:
- Range from 1 mHz to 102.4 kHz with an impressive amplitude accuracy of 1 %
- Phase-locked output with linear and logarithmic sweep capabilities
- Inputs and Outputs:
- X,Y Outputs: ±10 V, updated at 256 ksamples/s
- Auxiliary A/D and D/A Inputs/Outputs with ±10 V range
- Full suite of interface options: IEEE-488.2, RS-232, Centronics
- Display Configurations:
- Support for single and dual displays with real-time trace definitions
- Comprehensive data buffer for storing up to 64k data points
- General Specification:
- Hardcopy and data storage capabilities with options for screen dumps
- Equipped with a 3.5" MS-DOS compatible disk drive for data and setup management
- Power requirements: 60 W, compatible with 100/120/220/240 VAC, 50/60 Hz
