Weak Signal Measurements
Digital Lock-in Amplifier LIA001M
CIQTEK LIA001M is a high-performance lock-in amplifier that combines various functions such as lock-in amplification, virtual oscilloscope analysis, parameter scanning, demodulation plotting, and data analysis.
Based on advanced digital signal processing technology and hardware design, it can accurately and quickly detect weak signals drowned in strong noise.
It is one of the important tools for modern weak signal detection and analysis and can be used in various scientific research and industrial applications.
DC ~ 1 MHz demodulation frequency.
Current and differential voltage input.
100 MSa/s, 16 bit ADC sampling.
Full-scale sensitivity from 1 nV to 3 V.
Better than 3.1 nV/√Hz noise density.
More than 120 dB dynamic reserve.
Support Sine and TTL reference signal input and output.
internal reference, external reference, and dual reference.
Support 1/1023~1023th harmonic detection function.
Signal Inputs (Voltage and Current)
| Voltage Channel | 1 (single-ended and differential) |
| Current Channel | 1 |
| Frequency Range | 200 uHz ~ 1 MHz |
| Voltage Input Range | ±1 mV,±3 mV,±10 mV,±30 mV, |
| ±100 mV,±300 mV,±1 V,±3 V | |
| Voltage Input Noise | 3.1 nV/√Hz@1 kHz |
| Full-scale Input Sensitivity (Voltage Input) | 1 nV-3 V |
| Current Input Range | ±1 nA，±10 nA，±100 nA，±1 µA， |
| ±10 µA，±100 µA，±1 mA，±10 mA | |
| Current Input Noise | 20 fA/√Hz@100 Hz |
| Full-scale Input Sensitivity (Current Input) | 10 fA ~ 10 mA |
| Dynamic Reserve | ≥120 dB |
Demodulator Reference
| Number of Demodulators | 1 dual-phase demodulators |
| Reference Mode Selection | Internal reference, external reference, dual reference |
| Harmonic detection | Support (n/m)* F Harmonic measurement, (n/m)* F≤1 MHz； |
| Range of n (harmonics): 1 ~ 1023 | |
| Range of m (harmonics): 1 ~ 1023 | |
| Time Constant | 126 ns ~ 250 s |
| Filter Slope (dB/oct) | 6, 12, 18, 24, 30, 36, 42, 48 |
| Other Filter Functions | Sinc filter |
| Phase Resolution | 10 udeg |
| Frequency Resolution | 1 μHz |
Auxiliary Output
| Channels | 4 |
| Output Voltage Range | ±10 V |
| Maximum Output Current | 10 mA |
Reference Output
| Channel | 1 |
| Frequency Range | 200 uHz ~ 1 MHz |
| Output Voltage Range | ±10 mV,±100 mV,±1 V,±10 V |
| Signal Type | Sine/TTL |
| Output Phase Range | ±180° |
| Maximum Output Current | 100 mA |
Reference Input (Can be set to 2 auxiliary inputs)
| Channels | 2 |
| Frequency Range | DC ~ 1 MHz |
| Signal Type | Sine/TTL |
| Input Voltage Range | ±10 V |
Auxiliary Input
| Channels | 2 |
| Input Voltage Range | ±10 V |
Communication
| Communication Interface | LAN/1 Gbps |
Digital Lock-in Amplifier Melab
Melab is a high-performance and multi-functional digital lock-in amplifier. With rich analog I/O interfaces and multiple functions such as visual lock-in amplifier, virtual oscilloscope, parameter scanner, signal generator, data acquisition, AM/FM modulation, PID controller, etc.
Meanwhile, Melab supports an easy mode for a quick start, which simplifies the workflow of scientific research, reduces the need for researchers to combine multiple devices, and improves the efficiency and quality of scientific research.
DC to 1 MHz/5 MHz (optional)
One current input and one differential voltage input
4+4+4 application mode (4 demodulators + 4 external references + 4 PIDs) (optional)
Sampling rate: 100 MSa/s, 16 bit ADC
Full-scale sensitivity: 1n V～3 V
Noise density: < 2.5 nV/ Hz
Dynamic reserve: > 120 dB
Supports Sine and TTL reference signal input and output
Support 1/1023~1023 harmonics detection
> Functional Options
♦ 5M demodulation frequency
♦ 4 demodulators
♦ 4 PID controllers
♦ External wireless operating panel
♦ AM/FM modulation
♦ Stage Ctrl (platform control)
Signal Input (Voltage and Current)
| Voltage Channel | 1 (single-ended and differential) |
| Current Channel | 1 |
| Frequency Range | DC ~ 1 MHz/5 MHz (optional) |
| Voltage Input Range | ±1 mV, ±3 mV, ±10 mV, ±30 mV, ±100 mV, ±300 mV, ±1 V, ±3 V |
| Voltage Input Noise | 2.5 nV/√HZ@1 kHz |
| Full-scale Input Sensitivity (Voltage Input) | 1nV – 3V |
| Current Input Range | ±1 nA, ±10 nA, ±100 nA, ±1 µA, ±10 µA, ±100 µA, ±1 mA, ±10 mA |
| Current Input Noise | 14 fA /√HZ@100 Hz |
| Full-scale Input Sensitivity (Current Input) | 10 fA ~ 10 mA |
| Dynamic Reserve | ≥120 dB |
Reference Output
| Number of Channels | 1 |
| Frequency Range | DC ~ 1 MHz/5 MHz (optional) |
| Output Voltage Range | ±10 mV, ±100 mV, ±1 V, ±10 V |
| Signal Type | Sine/TTL |
| Output Phase Range | ±180° |
| Maximum Output Current | 100 mA |
Demodulator and Reference
| Number of Demodulators | 1 dual-phase/4 dual-phase (optional) |
| Reference Mode | Internal reference; External reference |
| Harmonic Detection | Supports (n/m)* Fth harmonic measurement, (n/m)* F<1 MHz/5 MHz (optional); n range (harmonics): 1~1023; m range (harmonics): 1~1023 |
| Time Constant | 126 ns~30 ks |
| Filter Slope (dB/oct) | 6, 12, 18, 24, 30, 36, 42, 48 |
| Other Filter Functions | Sinc filter |
| Phase Resolution | 10 udeg |
| Frequency Resolution | 355 nHz |
Reference Input (can be set to 2 auxiliary inputs)
| Number of Channels | 2 |
| Frequency Range | DC ~ 1 MHz/5 MHz (optional) |
| Signal Type | Sine/TTL |
| Voltage Input Range | ±10 V |
Auxiliary Input
| Number of Channels | 2 |
| Voltage Input Range | ±10 V |
Auxiliary Output
| Number of Channels | 4 |
| Output Voltage Range | ±10 V |
| Maximum Output Current | 20mA |
Communications
| Communications Interface | USB2.0 (device) + USB3.0 (host) LAN/1 Gbps |
Time-to-Digital Converter | TDC1610
CIQTEK TDC1610 is a compact high-precision time measurement instrument with 16 acquisition channels, 8ps time resolution, and support for time tag mode, which can record the time information of the acquired signal in real-time. It adopts an easy-to-operate graphical interface and provides C++, Python, and LabVIEW SDKs for secondary development. It can be widely used in scientific research fields such as statistical laser post-pulse distribution, quantum optics, optical detection, and lidar ranging.
Single channel saturation
count rate 71 Mcps.
Dead time less than 14 ns.
Jitter less than 17 ps.
Support Timestamp Mode.
Support conforming counting function.
TDC Time-to-Digital Converter
| Time Resolution (Minimum Time Width) | 8ps |
| Dead Time | <14ns |
| Jitter | <17ps |
| Dynamic Range | 4 ns – 16 ms (@ Resolution 8 ps) |
| Channel Saturation Count Rate | 71 Mcounts/sec Non-parallel |
| Collection Time | 1 ms ~ 100 h |
Channel Features
| Channels | 1+16 |
| Interface Type | SMA |
| Input Impedance | 50 Ω |
| Input Voltage Range | -5 V ~ +5 V |
| Threshold Resolution | 1 mV |
| Trigger Method | Threshold Triggering (rising/falling edge) |
Marker Channel
| Channels | 1 |
| Interface Type | SMA |
| Input Impedance | 50 Ω |
| Input Voltage Range | -5 V ~ +5 V |
| Threshold Resolution | 1 mV |
