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OE1201 detects an input signal in a single-ended mode or a differential voltage mode. With an ultra low-noise pre-amplifier, the input noise is as low as 9 nV/√Hz@997 Hz. The input impedance is 10 MΩ and the full-scale input voltage sensitivity ranges from 1 nV to 1 V. Besides, OE1201 can be used for current measurement with gains of 106 or 108 V/A. Two line filters (50/60 Hz and 100/120 Hz) are designed to eliminate power frequency interference. A programmable gain amplifier is used to adjust the dynamic reserve of the system, so that OE1201 can keep a high dynamic reserve of 120 dB.
The reference signal 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. OE1201 can work at any fixed frequency from 50 mHz to 120 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 OE1201 can detect the harmonics of the input signal. The maximum harmonic signal frequency can reach 32,767 times the fundamental frequency, and the maximum harmonic frequency cannot exceed the maximum operating frequency of the instrument by 120 kHz.
OE1201 has a 3.5-inch 320 x 240 color TFT-LCD. The measurement results of OE1201, such as X, Y, R, and θ, are shown in numerical form.
The internal oscillator of OE1201 generates a low distortion (–80 dBc) sine reference signal varying from 50 mHz to 120 kHz, which has a high frequency resolution of 1 mHz. The frequency and amplitude of the reference signal can be set by using the front panel of OE1201 or communication interface. When OE1201 is set in the external reference mode, the internal reference signal is phase-locked with the external reference signal.
OE1201 uses a high precision digital-to-analog converter (DAC) to output a sine wave signal at the same frequency as the internal reference signal. The amplitude and phase of the output sine wave can be set through the OE1201's display, where the maximum amplitude of the sine wave is 1 Vrms.
All functions of OE1201 can be selected through the knobs and left and right keys on the interface, and the parameters of the response can be set directly through the Settings button in the right bar. This instrument is equipped with the corresponding free LabVIEW program, which can effectively use all the test functions of OE1201, including setting the reasonable control parameters of the instrument and reading and saving the measured data of the instrument. This makes OE1201 easy to use in complex scientific experiments. On the LabVIEW interface, users can see all control commands and instrument feedback responses.
| Voltage input Mode | Single-ended or Differential |
| Full-scale Sensitivity | 1 nV - 1 V (voltage input), 1 fA - 1 µA (current input） |
| Current input | 106 or 108 V/A |
| Impedance | |
| Voltage | 10 MΩ//25 pF, Ac or DC coupling |
| Current | 1 kΩ to virtual ground |
| C.M.R.R | >100 dB to 10 kHz, Decreasing by 6 dB/oct |
| Dynamic reserve | >100 dB |
| Gain accuracy | 0.2% typ., 1% max |
| Voltage Noise | |
| 9 nV/√Hz@997Hz | |
| Current Noise | |
| 0.13 pA/√ Hz @97 Hz | |
| 0.14 pA/√ Hz @997Hz | |
| Line filters | 50/60 Hz and 100/120 Hz |
| Gounding | BNC(A/I, B)shield can be grounded or floated via 10 kΩ to ground |
| Input | |
| Frequency range | 50 mHz to 120 kHz |
| Reference input | TTL or Sine |
| Input impedance | 1 MΩ//25pF |
| Phase | |
| Resolution | 1 μdeg |
| Absolute phase error | <1 deg |
| Relative phase error | <1 mdeg |
| Drift | |
| Below 10 kHz | <0.1 deg/℃ |
| Above 10 kHz | <0.2 deg/℃ |
| Harmonic detection | 2F, 3F, …nF to 120 kHz (n<32,767) |
| Acquisition time | |
| Internal Ref. | Instantaneous acquisition |
| External Ref. | (4 cycles + 5 ms) or 100 ms |
| 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 (<100 Hz) |
| 10 µs to 30 s (>100 Hz) | |
| (6, 12, 18, 24 dB/oct rolloff) | |
| Synchronous filters | Available below 20 Hz (18, 24 dB/oct rolloff) |
| Frequency | |
| Range | 50 mHz - 120 kHz |
| Accuracy | 2 ppm + 30 µHz |
| Resolution | 1 mHz |
| Distortion | -80 dBc (f<10 kHz), -70 dBc (f>10 kHz) |
| Amplitude | -90 dB |
| Accuracy | 1% typ., 3% max |
| Stability | 100 ppm/℃ |
| Sine Output | Output impedance 50Ω |
| TTL Sync Output | 5V TTL/CMOS level, |
| Output Impedance 200Ω |
| CH1 and CH2 Outputs | |
| Function | Output X, Y, R, θ harmonic |
| Output Voltage | ±5 V |
| Output Current | ±30 mA max |
| Update Rate | 500 kSa/s |
| Screen | 3.5 inch, 320×240 TFT |
| Screen format | Single display |
| Display quantities | Display X,Y,R,θ |
| Display types | Numerical display |
| RS-232 to USB | RS-232 to USB2.0 interface |
| RS-232 interface | Standard 9-pin RS-232 male socket |
| IEEE-488 interface(optional) |
| Power requirements | |
| Voltage | 110-220 V AC |
| Frequency | 50/60 Hz |
| Power | 10 W typ., 20W max |
| Dimensions | |
| Weight | 3.2 KG |
| Width | 259 mm |
| Depth | 320 mm |
| Height | |
| With feet | 115 mm |
| Without feet | 102 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 |
RS232-GPIB conversion module is optional, which is compatible with RS232 interface of all Products of SSI.
| File name | Explain | Size | Version number | Download |
| OE1201 Introduction Document | Product Introduction Document of OE1201 Small Lock-in Amplifier. | 1551kb | v250418 |
Download
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| OE1201 User Manual | Operating Manual for OE1201 Small Lock-in Amplifier. | 8074kb | v230626 |
Download
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| Control Software Driver | This LabVIEW firmware needs to be installed first before the control software of each platform can be used. | 368275kb | v2011 |
Download
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| OE1201 Control Software | OE1201 Miniaturized lock-in amplifier LabVIEW control Platform software. | 939kb | v20211019 |
Download
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| Serial Port Driver | Windows7 and 8 users need to install this driver before using USB serial ports and RS232 serial ports. | 4316kb | v.2.12.26 |
Download
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| USB_Driver for Win7/8 | Users of Windows 7 and 8 need to install the USB2.0 driver separately. | 24820kb | v1.5.0 |
Download
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