SE2041 DSP Lock-In Amplifier

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SE2041 DSP Lock-In Amplifier

Overview Specifications Ordering Resources

SE2041 Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 1 mHz to 80 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.

SE2041 Unit Price: US$20,166.00

Key Features

DC to 80 MHz frequency range

1 nV to 1 V full-scale sensitivity

Time constants from 100 ns to 3 ks

> 120 dB dynamic reserve

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

Up to 6 demodulators

A high-performance signal generator

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

Flowchart Interface

The SE2041 host software offers an optional flowchart mode for displaying the lock-in amplifier configuration. This flowchart provides users with a visual representation of the instrument’s internal hardware and algorithmic architecture, facilitating a better understanding of the function of each parameter.
Oscilloscope Functions

The oscilloscope function features a single signal channel, supporting selectable inputs (signal, reference, and auxiliary) and outputs (signal and auxiliary). It offers various triggering modes and provides users with real-time display of time-domain signals. Each channel boasts a maximum sampling depth of 262,144 points and a maximum sampling rate of 250 MSPS.
FFT Spectrum Analysis

The FFT spectrum analysis function analyzes the frequency-domain information of a signal based on waveforms captured by the oscilloscope. Depending on the sampling rate and sampling depth, the frequency resolution of the spectrum analysis ranges from approximately 0.01 Hz to 950 Hz.
PID Controller

The SE2041 features a built-in, independent dual-channel digital PID controller with a sampling rate of up to 3.9 MSPS. Tightly integrated with the lock-in amplifier, the PID controller utilizes the demodulator’s measurements to control output signal parameters—such as amplitude, phase, and frequency—thereby enabling the precise regulation of various controlled variables.
Parameter Scanner

The parameter scanner provides users with convenient, rapid scanning capabilities, enabling the real-time plotting of curves such as frequency and amplitude responses, and offers both single-sweep and continuous-loop scanning modes.
Plotter

The plotter function offers a rich array of features, including the ability to continuously scroll and display changing time-domain data waveforms, flexibly scale both the horizontal and vertical axes, display various measurement values, toggle between linear and logarithmic coordinates, and show the maximum and minimum values of the current waveform.
Application of Lock-in Amplifier in Biomedicine

The development of biomedicine has put forward higher frequency bands and sensitivity for the measurement of electrical impedance spectroscopy of cellular and subcellular components. Currently, using a digital lock-in amplifier to construct a microfluidic device for electrical impedance spectroscopy measurement is the most effective method.

The impedance cytometry technique is a suitable method to observe the size and velocity of cells in microfluidic channels. It is based on monitoring changes in the dielectric properties of cells as they pass through two electrode pairs in a microfluidic channel. It has a fast response time, no tagging and integrates classification operations.

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1. Signal Channel
Voltage Input Mode	Single-ended or Differential
Full-scale Sensitivity	1 nV to 2 V
Impedance	Voltage: 50 Ω // 10 pF or 10 MΩ // 10 pF, AC or DC coupled
C.M.R.R	>80 dB to 100 Hz, >70 dB to 1MHz
Dynamic Reserve	> 120 dB
Gain Accuracy	0.5% typ (<1 MHz), 3% max
Noise	• 3.5 nV/√Hz @100 kHz • 3 nV/√Hz @1 MHz
Gounding	BNC shield can be grounded or floated via 1 kΩ to ground

2. Reference Channel
Input	• Frequency range: DC to 80 MHz • Input impedance: 50 Ω // 10pF , 1 MΩ//10 pF
Phase	• Resolution: 0.001 deg • Absolute phase error: < 1 deg typ (<1 MHz), 5 deg max

3. Demodulator
Stability	• Digital output: no zero drift on all setting • Display: no zero drift on all setting • Analog output: <200 ppm/℃
Time Constant	100 ns to 3 ks (6,12,18,24, 30,36,42,48 dB/oct rolloff)
Synchronous Filters	Effective below 1 MHz with a rolloff greater than 18 dB/octave.

4. Internal Oscillator
Frequency	• Range: DC to 80 MHz • Accuracy: 2 ppm + 1 µHz
Distortion	• -75 dBFS (f=100 kHz) • -60 dBFS (f=1 MHz)
Amplitude	1 μV to 2 Vrms
Accuracy	0.5% typ (<1 MHz), 3% max
Stability	< 200 ppm/℃
TTL Output	3.3 V TTL/CMOS level

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, 0.3 mV resolution • Impedance: 1 MΩ
AUX/CH Outputs	• Function: 4 channel inputs • Voltage: ±10 V full scale, 0.3 mV resolution
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) × 470 (D) mm (without feet)
Weight	12 kg

Main Machine

Module No.	Item	Description
SE2041	Digital Lock-in Amplifier	DC to10/80 MHz, 1 nV to 1 V full-scale sensitivity

Document

SE2041 DSP Lock-in Amplifier Datasheet