+86 20 84133345
+1 781 218 9688
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 106 or 108 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.
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.
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.
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.
| 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 |
| 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 |
| Input: | |
| 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 | |
| Phase: | |
| 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) | |
| Drift | <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 |
| Number of demodulators | 6 |
| Stability: | |
| 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 3 s (<200 Hz) | |
| Synchronous filters | Available below 200 Hz(18, 24 dB/oct rolloff) |
| 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 | 100ppm/℃ |
| Sine Outputs | Sine signal, output impedance 50 Ω |
| TTL Outputs | 5V TTL/CMOS level, output 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 |
| Colour | Yellow / Green |
| 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 |
| USB2.0 |
| RS232 interfaces |
| IEEE-488 interface(optional) |
| Power requirements: | |
| Voltage | 220-240 V AC |
| 100-120 VAC(optional) | |
| Frequency | 50/60 Hz |
| Power | Rated power 50 watts, peak power not to exceed 60 watts |
| Power supply rejection | 70dB@1MHz |
| Weight | 11 KG |
| Dimensions | |
| Width | 448 mm |
| Depth | |
| Including handle | 513 mm |
| Excluding handle | 470mm |
| Height: | |
| Including feet | 148 mm |
| Excluding fee | 133mm |
| 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 |
| File name | Explain | Size | Version number | Download |
| OE1022D Introduction Document | Product Introduction Document of OE1022D Lock-in Amplifier | 1630kb | v250418 |
Download
|
| OE1022D User Manual | Operating Manual for OE1022D Dual-Channel Lock-in Amplifier | 11095kb | v250814 |
Download
|
| Serial Port Debugging Assistant | Serial port debugging assistant, facilitating the debugging of instruments. | 486kb | v3.8.3 |
Download
|