SE2031 DSP Lock-In Amplifier

SE2031 Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 1 mHz to 10 MHz. With the advantage of the latest digital signal processing technology and high-speed 16-bit ADC, SE2031 can easily detect the phase and the magnitude of weak signals overwhelmed by various large noise. The performance of SE2031 is as good as other lock-in amplifier brands, even better in some certain parameters, such as measurement accuracy, SNR, dynamic reserve. Otherwise, SE2031 integrates some special functions like multiple harmonic measurement, which meets the needs of scientific research and industrial application well.

Key Features

1 mHz to 10 MHz frequency range

1 nV to 1 V full-scale sensitivity

Time constants from 10 µs to 3 ks

> 120 dB dynamic reserve

A high-performance signal generator

Oscilloscope, spectrum analyzer

PID controller, AM modulation

Up to 4 demodulators

Dual-phase structure guarantees higher accuracy

5.6 inch color TFT-LCD screen, single or dual display

Support remote control, embedded a free LabVIEW program

  • Multiple Application Areas

    Scanning microscope: AFM, STM, SPM

    Materials: Carrier mobility, Carrier density, Hall effect, Ultrasonic materials

    Transport measurement: Conductivity measurement, Impedance measurement

    Noise represents: Noise density, Cross-correlation measurement

    Optical experiment: Spectral analysis, Spectral measurement, THz measurement, TDLAS

    Sensor measuring: Gyroscope, Photoelectric sensor, Resonator, Accelerometer

    Magnetic Sensor: SQUIDs, NV color center, Atomic Magnetometer, VSM

    Biomedical: Microfluidic

     

       << Click to find more solutions ! >>

  • EPR Measurement

    Electron paramagnetic resonance (EPR) or electron spin resonance (ESR) is one of the most informative techniques for understanding the electronic structure of paramagnetic substances. EPR spectroscopy is particularly useful for studying (bio)chemical systems with strong local spin densities and their interactions with the environment.

     

    EPR measurements are usually performed in continuous wave (CW) or pulsed (Pulse) mode. The cwEPR spectrometer (see figure) applies a magnetic field of about 0.35 T and measures microwave absorption (X-band) in the 9-10 GHz range. Typically, the microwaves are kept at a fixed frequency and sweep the magnetic field (from 0 mT – 700 mT for the X-band).

  • Trusted by Universities and Research Institutes Around the World!

    Typical Customers:

    •  The Hong Kong Polytechnic University

    •  Universität Regensburg

    •  Rice University

    •  Weizmann Institute of Science

    •  University of Wisconsin-Madison

    •  Massachusetts Institute of Technology

    •  University of Texas at Austin

    •  Northeastern University

     

    You can trust us !

1. Signal Channel
Voltage Input Mode

Single-ended or Differential

Full-scale Sensitivity

1 nV to 1 V in a 1-2-5 sequence

Impedance

Voltage: 50 Ω// 5pF or 10 MΩ// 5pF, AC or DC coupled

C.M.R.R

>70 dB to 100 Hz,  >50 dB to 100kHz

Dynamic Reserve

> 120 dB

Gain Accuracy

0.5% typ (<1 MHz), 3% max

Voltage Noise

6 nV/√Hz at 99.99 kHz,  14 nV/√Hz at 997 Hz

Gounding

BNC shield can be grounded or floated via 1 kΩ to ground

2. Reference Channel
Input

•  Frequency range:  1 mHz to 10 MHz

•  Reference input: TTL or Sine

•  Input impedance: 1 MΩ//5 pF

•  TTL level: VINH>3 V , VINL<0.5 V

•  Sine reference level: 0.2 V < VPP< 10 V, Freq. > 1 Hz

Phase

•  Resolution: 0.001 deg

•  Absolute phase error: < 1 deg typ (<1 MHz), 5 deg max

•  Relative phase error: < 1 mdeg

•  Orthogonality: 90° ± 0.001°

•  Phase noise: (Internal ref.) Synthesized, <0.0001°rms at 1 kHz;  (External ref.) 0.005°rms at 1 kHz (100 ms time constant, 12 dB/oct)

•  Drift: <0.01°/℃ below 100 kHz, <0.1°/℃ above 100 kHz

Harmonic Detection

2F, 3F, …nF to 10 MHz  (n<32767)

Acquisition Time

•  Internal ref.: instantaneous acquisition

•  External ref.: (2 cycles + 5 ms) or 40 ms, whichever is larger

3. Demodulator
Stability

•  Digital output: no zero drift on all setting

•  Display: no zero drift on all setting

•  Analog output: <50 ppm/℃ for all dynamic reserve settings

Harmonic Rejection

-90 dB

Time Constant

30 ns to 4.4 ks (6,12,18,24, 30,36,42,48 dB/oct rolloff)

Synchronous Filters

Available below 200 Hz (18,24,30,36,42,48 dB/oct rolloff)

4. Internal Oscillator
Frequency

•  Range: 1 mHz to 10 MHz

•  Accuracy: 2 ppm + 10 µHz

•  Resolution: 1 mHz

Distortion

•  -80 dBc (f < 100 kHz)

•  -60 dBc (f > 1 MHz)

Amplitude

1 μV to 1 Vrms

Accuracy

0.5% typ (<1 MHz),  2% max

Stability

50 ppm/℃

TTL Output

5V TTL/CMOS level, 50Ω output impedance

5. Interface

USB2.0 and RS-232(DB-9) and 1000Mbps Enthernet

6. Inputs & Outputs
AUX Inputs

•  Function: 4 channel inputs

•  Voltage: ±10 V full scale, 0.1 mV resolution

•  Impedance: 1 MΩ

AUX/CH Outputs

•  Function: 4 channel inputs

•  Voltage: ±10 V full scale, 0.1 mV resolution

•  Impedance: 1 MΩ

Drive Current

30 mA max output current

7. Display
Screen

5.6 inch, 640×480 TFT

Screen Format

Single or dual display

Display Quantities

Each display shows one trace, traces can be defined as X,Y,R,θ

Display Types

Numerical form, bar graph

8. General
Power Requirement

•  Voltage: 220 – 240 VAC, 100 – 120 VAC (optional)

•  Frequency: 50/60 Hz

•  Power: 40 W

Dimension

•  448 (W) × 148 (H) × 513 (D) mm  (with feet)

•  448 (W) × 133 (H) × 513 (D) mm  (without feet)

Weight

12 kg

Main Machine

Module No. Item Description
SE2031 Digital Lock-in Amplifier 1 mHz to 10 MHz, 1 nV to 1 V full-scale sensitivity