SE1022D DSP Lock-In Amplifier (Dual-channel)

SE1022D Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 1 mHz to 102 kHz. More importantly, SE1022D has dual independent input channels and dual independent high precision signal generators. Each input channel and signal generator can be used independently which means that the SE1022D is equivalent to two traditional lock-in amplifiers. Moreover, due to the twin symmetrical design, the two independent input channels and signal generators have ultra-high synchronicity, which meets the measurement requirements demanding extremely high synchronization.

Key Features

2 independent input channels and 2 signal generators

1 mHz to 102 kHz frequency range

1 nV to 1 V full-scale sensitivity

Time constants from 10 µs to 3 ks

> 120 dB dynamic reserve

Noise as low as 5 nV/√Hz @997 Hz

Detect 6 harmonics at one time

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

Adopt high-precision 24-bit ADC and FPGA+ARM digital platform architecture, better than DSP architecture

  • 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 ! >>

  • Solar Cell Quantum Efficiency Detection

    The quantum efficiency of solar cells is divided into two types: EQE and IQE. The test system includes dual-channel lock-in amplifier, optical chopper, monochromator and other equipments.

     

    The detection light from the monochromator is split into two beams. One beam is converted into photocurrent and input to the channel 1 of lock-in amplifier for comparison. The other beam illuminates the solar cell, and the resulting photocurrent is measured by channel 2 of the lock-in amplifier.

     

    The ratio of the two channel measurements, combined with the relevant formula, allows the quantum efficiency of the solar cell to be calculated.

1. Signal Channel
Voltage Input Mode

Single-ended or Differential

Full-scale Sensitivity

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

1 fA to 1 µA

Current Input

106 or 108 V/A

Impedance

•  Voltage: 10 MΩ // 25 pF, AC or DC coupled

•  Current: 1 kΩ to virtual ground

C.M.R.R

> 100 dB to 10 kHz, decreasing by 6 dB/oct

Dynamic Reserve

> 120 dB

Gain Accuracy

0.2% typ, 1% max

Voltage Noise

5 nV/√Hz at 997 Hz

Current Noise

•  15 fA/√Hz at 97 Hz

•  13 fA/√Hz at 997 Hz

Line Filters

50/60 Hz and 100/120 Hz

Gounding

BNC shield can be grounded or floated via 10 kΩ to ground

2. Reference Channel
Input

•  Frequency range:  1 mHz to 102 kHz

•  Reference input: TTL or Sine

•  Input impedance: 1 MΩ//25 pF

Phase

•  Resolution: 1 µdeg

•  Absolute phase error: < 1 deg

•  Relative phase error: < 1 mdeg

•  Orthogonality: 90° ± 0.001°

•  Phase noise: (Internal ref.) Synthesized, <0.0001°rms at 1 kHz;  (External ref.) 0.001°rms at 1 kHz (100 ms time constant, 12 dB/oct)

•  Drift: <0.01°/℃ below 10 kHz, <0.1°/℃ above 10 kHz

Harmonic Detection

2F, 3F, …nF to 102 kHz  (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: <5 ppm/℃ for all dynamic reserve settings

Harmonic Rejection

-90 dB

Time Constant

•  10 µs to 3 ks (<200 Hz)

•  10 µs to 30 s (>200 Hz)

(6, 12, 18, 24 dB/oct rolloff)

Synchronous Filters

Available below 200 Hz (18, 24 dB/oct rolloff)

4. Internal Oscillator
Frequency

•  Range: 1 mHz to 102 kHz

•  Accuracy: 2 ppm + 10 µHz

•  Resolution: 1 mHz

Distortion

•  -80 dBc (f < 10 kHz)

•  -70 dBc (f > 10 kHz)

Amplitude

0.001 to 5 Vrms

Accuracy

1%

Stability

50 ppm/℃

Output

Sine output on rear panel, and TTL sync output on rear panel

5. Interface

USB2.0 and RS-232 interface

6. Outputs
CH1 and CH2 Outputs

•  Function: output X, Y, R, θ

•  Output voltage: ±10 V full scale, 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 and strip chart

8. General
Power Requirement

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

•  Frequency: 50/60 Hz

•  Power: 50 W

Dimension

•  473 (W) × 160 (H) × 490 (D) mm  (with feet)

•  473 (W) × 147 (H) × 490 (D) mm  (without feet)

Weight

11 kg

Main Machine

Module No. Item Description
SE1022D Digital Lock-in Amplifier 1 mHz to 102 kHz, 1 nV to 1 V full-scale sensitivity, dual independent input channels and signal generators

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