SE2041 DSP Lock-In Amplifier

SE2041 Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 1 mHz to 30 MHz. With the advantage of the latest digital signal processing technology and high-speed 250MSPS 14-bit ADC, SE2041 can easily detect the phase and the magnitude of weak signals overwhelmed by various large noises. The performance of SE2041 is as good as other lock-in amplifiers all over the world, even better than them in some certain parameters, such as measurement accuracy, SNR, dynamic reserve, which meets the needs of scientific research and industrial application well.

Key Features

1 mHz to 30 MHz frequency range

1 nV to 1 V full-scale sensitivity

Time constants from 30 ns to 4 ks

> 120 dB dynamic reserve

Input noise as low as 6 nV/√Hz@100 kHz

Up to 4 demodulators

Automatic adjustment

Multiple-harmonic measurement

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

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 // 5 pF or 10 MΩ // 5 pF, 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

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 30 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 30 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 30 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, 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: 50 W typ, 70W max

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
SE2041 Digital Lock-in Amplifier 1 mHz to 30 MHz, 1 nV to 1 V full-scale sensitivity

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