SE1022 DSP Lock-In Amplifier

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SE1022 DSP Lock-In Amplifier

Overview Specifications Ordering Resources

SE1022 Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 1 mHz to 102 kHz. With the advantage of the latest digital signal processing technology and high-precision 24-bit ADC, SE1022 can easily detect the phase and the magnitude of weak signals overwhelmed by various large noises. The performance of SE1022 is as good as other lock-in amplifiers brands, even better in some certain parameters, such as measurement accuracy, SNR, dynamic reserve. Otherwise, SE1022 integrates some special functions like multiple harmonic measurement and FFT, which meets the needs of scientific research and industrial application well.

* Saluki SE1022 can be comparable to SRS SR830, even better and more stable.

Key Features

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

Multiple-harmonic measurement

FFT spectral analysis

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

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Application of Lock-in Amplifier in TDLAS Technology

TDLAS is a detection technology that can realize the measurement of gas component concentration. The lock-in amplifier is used to achieve the second harmonic detection of the modulated signal.

In this system, the most critical part is to use the lock-in amplifier to realize the two-way detection of the measured gas and the reference gas at the same time, and even need to realize the three-way detection of the measured gas, the reference gas and the laser. The multi-channel harmonic measurement function of SE1022 can solve this problem perfectly.
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

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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 front panel, and TTL sync output on rear panel

5. Interface	RS-232 to USB interface, and IEEE-488 interface (optional).

6. Outputs
CH1 and CH2 Outputs	• Function: output X, Y, R, θ • Output voltage: ±10 V full scale, 30 mA max output current • Update rate: 312.5 kHz

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, polar plot and strip chart

8. General
Power Requirement	• Voltage: 220 – 240 VAC, 100 – 120 VAC (optional) • Frequency: 50/60 Hz • Power: 30 W
Dimension	448 (W) × 148 (H) × 513 (D) mm (with feet)
Weight	11 kg

Main Machine

Module No.	Item	Description
SE1022	Digital Lock-in Amplifier	1 mHz to 102 kHz, 1 nV to 1 V full-scale sensitivity

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