Dual Channel Lock-in Amplifier
102kHz Dual Channel Lock-in Amplifier
1mHz to 102kHz frequency 
range10us to 3ks time constants
>100 dB dynamic reserve1nV to 
1nV to1V full-scale sensitivity
Multiple-harmonic measurement 
FFT spectral analysis
5.6-inch color display
Application Area
Software Interface
Data download
Related videos

Input Channel

    Two independent input channels have high synchronicity and can be individually configured as a single-ended mode or a differential voltage mode With the low-noise analog pre-amplifier, the signal input of OE1022D can be switched to operate in the single-ended or differential voltage mode, and the input noise is 5 nV/√Hz. The input impedance is 10 MΩ and the full-scale input voltage sensitivity ranges from 1 nV to 1V. Besides, OE1022D can also be used for current measurements with variable current gains of 10^6 or 10^8 V/A. Two line filters (50/60 Hz and 100/120 Hz) are designed to eliminate line related interference. The programmable gain amplifier is provided to adjust the dynamic reserve of the system according to the magnitude of the input signal, so that OE1022D has inherently large dynamic reserve up to 100dB. The sampling rate of 312.5KSPS is determined by a precision 24-bit A/D converter and a specific filter is designed to avoid aliasing.

Reference Channel

    Two independent reference channels can work in external mode or internal mode. In internal mode, a precise and stable internal oscillator generates sine wave as an internal reference that is multiplied by the input signal. This internal signal is without any phase noise. With the digital phase-shifting technique, the phase resolution of the reference signal is 0.01 deg. OE1022D can work at any fixed frequency from 1 mHz to 102 kHz in this mode. In external mode, the reference signal can be a sine wave or a TTL pulse or a square wave. The rising or falling edge of the external reference signal triggers the Phase Lock Loop (PLL) to lock the external signal. Based on the frequency of the reference signal, the OE1022D can detect the harmonics of the input signal. The maximum harmonic signal frequency can reach 32767 times the fundamental frequency, and the maximum harmonic frequency cannot exceed the maximum operating frequency of the instrument by 102 kHz. In addition, the OE1022D has a single-channel reference mode, in which two independent input channels are locked and measured using the same external reference channel (REF IN A). This mode can further meet the need for higher synchronization requirements.


    OE1022D uses the 5.6 inch 640×480 TFT color display as its screen. Data measured by OE1022D, such as, X, Y, R, θ, is stored in up to four traces. Trace values can be displayed as a bar graph or as a strip chart showing the trace values as a function of time.


    Besides, OE1022D can display polar plots, showing phasor composed by in-phase and quadrature components of the signal. All displays can be easily scaled by the manual operation, and the auto-scale feature is available to optimize display quickly. The screen can be configured as a single large display, or two horizontally-split displays.



Simultaneous Multiple-harmonic Measurement

    In the traditional lock-in amplifiers, only the fundamental frequency signal or a certain harmonic signal can be measured at one time, so it can not meet the requirement of multiple-harmonic measurement in some occasions. On the contrary, OE1022D uses a flexible digital framework combined FPGA and ARM, which make it practicable and efficient to measure 3 harmonic components simultaneously for each input channel, which means that each input channel is equivalent to three traditional lock-in amplifiers. Because of two independent input channels in OE1022D, OE1022D can detect 6 harmonics (2 fundamentals and 4 harmonics) at one time. The maximum harmonic signal frequency can reach 32,767 times the fundamental frequency, but the maximum harmonic frequency cannot exceed the maximum operating frequency of the instrument by 102 kHz.


Remote Operation

    OE1022D uses RS-232 and USB 2.0 as standard interfaces. Through communication interfaces, all instrument functions can be controlled and all data can be read in real-time. Meanwhile, all interfaces of OE1022D are distributed on the front panel and the rear panel.

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
                Voltage                              10 MΩ
                Current                              1 kΩ to virtual ground
        C.M.R.R                                     >100 dB to 10 kHz, decreasing
        Dynamic reserve                        >120 dB
        Gain accuracy                            0.2% typ, 1% max

        Voltage Noise
                                                           5 nV/Hz at 997 Hz
        Current Noise
                                                           5 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

Reference Channel

                Frequency range                1 mHz to 102 kHz
                Reference input                  TTL or Sine
                Input impedance                 1 MΩ
                Square reference level        VIH>3V, VIL<0.5V
Sine reference signal          >1 Hz
                                                            > 400 mVpp
                 Resolution                          0.001°
         Absolute phase error          <1°
                 Relative phase error           <1 mdeg
                 Phase noise
                                                            Internal ref. Synthesized, <0.0001 deg at1 kHz
                                                            External ref. 0.001 deg at 1 kHz (100 ms time constant, 12 dB/oct)
                                                            <0.01 deg/℃ below 10 kHz
                                                            <0.1 deg/℃ above 10 kHz

        Harmonic detection                     2F, 3F, …nF to 102 kHz (n<32,767)


        Acquisition time

                                                            Internal Ref.     Instantaneous acquisition

                                                            External Ref.        (2 cycles + 5 ms) or 40 ms,whichever is larger



                Digital outputs                      no zero drift on all setting

                Display                                 no zero drift on all setting

                Analog outputs                     <5 ppm/℃ for all dynamic reserve settings

        Harmonic rejection                     -90 dB

        Time constants                           10 µs to 3 ks (<200 Hz)

                                                           10 µs to 30 s (>200 Hz)

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

Internal Oscillator  

        Frequency                                 Range 1 mHz to 102 kHz

         Accuracy                                   2 ppm + 10 µHz

                Resolution                         1 mHz

        Disrortion                                   -80 dBc (f<10 kHz),-70 dBc (f>10 kHz)

        Amplitude                                   0.001Vrms to 5 Vrms ( Resolution:1 mVrms)

                Accuracy                            1%

                Stability                               50 ppm/℃

        Sine Outputs

                                                           Sine signal,output impedance 50 Ω

        TTL Outputs                               5V TTL/CMOS level,utput impedance 200Ω


        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


AUX Inputs and Outputs  

        CH1 and CH2 Outputs

                Function                             Output X, Y, R, θ

                Output Voltage                    ±10 V full scale.

                                                            30 mA max output current

                Update Rate                        312.5kHz

        AUX Inputs

                Function                             4 Channel Inputs

                Amplitude                           ±10 V,1 mV resolution ratio

                Impedance                         1 MΩ

        AUX Outputs

                Function                             4 Channel Outputs

                Amplitude                           ±10 V,1 mV resolution ratio

                Drive current                      ±25mA max

        Trigger Input

                Function                             TTL external trigger is used for data storage

        Monitor Output

                Function                             Analog output of a signal-amplifier

                Drive current                      ±40mA max


        RS-232 to USB interface,

        IEEE-488 interface(optional).


        Power requirements

                Voltage                                220~240 V AC

                                                            100~120 VAC(optional)

                Frequency                           50/60 Hz
                Power                                  30 W

        Power supply rejection                70dB@1MHz

        Weight                                         11 KG      


                Width                                  448 mm

                Depth                                  513 mm



                        With feet                     148 mm

Scanning microscope                AFM、STM、SPM

Materials science                      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  

Chinese Interface


English Interface


File name
Version number
OE1022D Dual Channel LIA's Introduction
OE1022D Dual Channel LIA's LabVIEW Console
Serial debugging assistant, easy to debug the instrument
Uart Driver
Windows 7/8 Users need to install the driver before using the USB serial port and RS232 serial port
USB_Driver for Win7/8
Users of windows 7/8's need to install this USB2.0 driver
OE1022D Dual Channel LIA's user manual
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