Stanford SR850 Lock-In Amplifier (1 mHz - 102.4 kHz)

Signal Channel:

Voltage inputs: Single-ended or differential

Sensitivity: 2 nV to 1 V

Current input: 106 or 108 V/A

Input impedance:

Voltage input: 10 MΩ + 25 pF, AC or DC coupled

Current input: 1 kΩ to virtual ground

Gain accuracy: ±1 % (±0.2 % typ.)

Noise:

6 nV/√Hz at 1 kHz

0.13 pA/√Hz at 1 kHz (106 V/A)

0.013 pA/√Hz at 100 Hz (108 V/A)

Reference Channel:

Frequency range: 0.001 Hz to 102.4 kHz

Reference input: TTL or sine (400 mVpp min.)

Input impedance: 1 MΩ, 25 pF

Phase resolution: 0.001°

Absolute phase error: <1°

Relative phase error: <0.001°

Orthogonality: 90° ± 0.001°

Phase noise:

Int. reference: <0.0001° rms at 1 kHz

Ext. reference: 0.005° rms at 1 kHz, 100 ms, 12 dB/oct

Demodulator:

Stability:

Digital outputs: no drift

Analog outputs: <5 ppm/°C for all dynamic reserves

Harmonic rejection: -90 dB

Internal Oscillator:

Range: 1 mHz to 102.4 kHz

Accuracy: 25 ppm + 30 µHz

Resolution: 0.01 % or 0.1 mHz (whichever is greater)

Distortion:

-80 dBc (f < 10 kHz)

-70 dBc (f > 10 kHz) at 1 Vrms

Amplitude: 0.004 to 5 Vrms into 10 kΩ (2 mV resolution)

Output impedance: 50 Ω

Amplitude accuracy: 1 %

Amplitude stability: 50 ppm/°C

Inputs and Outputs:

Interfaces: IEEE-488.2, RS-232 and Centronics interfaces standard. All instrument functions can be controlled and read though the interfaces.

X, Y outputs: ±10 V, updated at 256 ksamples/s

CH1 output: ±10 V output of X, R or Trace 1 to 4

CH2 output: ±10 V output of Y, Θ or Trace 1 to 4

Aux. A/D inputs: 4 BNC inputs, 1 mV resolution, ±10 V

Aux. D/A outputs: 4 BNC outputs, 1 mV resolution, ±10 V (fixed or swept amplitude)

General:

Hardcopy: Screen dumps to dot matrix or LaserJet printers. Plots to HP-GL plotters (RS-232 or GPIB).

Data storage: USB drive. Storage of data and instrument setups (binary or ASCII). Screens can be saved as PCX files.

Power: 60 W, 100/120/220/240 VAC, 50/60 Hz

Dimensions: 17" × 6.25" × 19.5" (WHL)

Weight: 40 lbs.

Datasheet

Manual