Moku:Go’s Lock-in Amplifier

Compare all lock-in amplifiers

Overview

Moku:Go’s Lock-in Amplifier supports dual-phase demodulation (XY/Rθ) from DC to 20 MHz. It also features an integrated 2-channel oscilloscope and data logger, enabling you to observe signals at up to 125 MSa/s and log data at up to 1 MSa/s.

Specs

Demodulation frequency
Demodulate with frequencies ranging from 1 mHz to 20 MHz with 1 μHz resolution

Dynamic reserve
>80 dB

Adjustable time constant
From 128 ns to 1.59 s

Filter slopes
6, 12, 18, 24 dB/Oct

Ultra-fast data acquisition
• Snapshot mode up to 125 MSa/s,
• Continuous mode up to 1 MSa/s

Dual-phase demodulation
X/Y or R/θ

Phase shift precision
0.001°

Input impedance
1 MΩ

Output gain range
-80 to +80 dB

Local oscillator output
Up to 20 MHz with variable amplitude

Key features

Extract signals with high precision
Measure signals obscured by noise with more than 80 dB dynamic reserve

Custom configuration and data acquisition
Built-in probe points for signal monitoring and data logging

Choose your output coordinate
Toggle between rectangular (X/Y mode) or polar coordinates (R/θ mode)

Onboard PID controller
Real-time control over proportional, integral, and derivative gain profiles

Select from different demodulation modes
Internal, external (direct local oscillator input or phase-locked loop), with the option to bypass the mixer stage

Applications

Laser frequency stabilization

Analog radio

RF demodulation

Documentation

Datasheets

Moku:Go’s Lock-in Amplifier Datasheet

Software & APIs

Wirelessly configure and monitor your Lock-in’s performance, all from intuitive Moku software for Windows or macOS, or with APIs for Python, MATLAB, and LabVIEW.

Intuitive software for Windows and Mac

Configure your instrument and save and share data with Moku software. Free and easy to use, all 11 instruments are available with no software license required.

Try it in demo mode

Quadrature Demodulation

Moku:Go’s Lock-in Amplifier features a dual-phase (quadrature) demodulator to retrieve both amplitude and phase information. Cascaded single pole lowpass filters attenuate the second harmonic and suppress noise in each quadrature, giving direct demodulation of amplitude and phase modulated signals.

• Select between 6, 12, 18, and 24 dB / octave lowpass filter slopes and a wide range of corner frequencies
• Polar (R/θ) coordinate mode gives AM and PM demodulation
• View and measure signals throughout the signal path using the integrated oscilloscope

Internal and external references

Demodulate your input signal with an internal or external reference. In internal mode, the orthogonal reference signals are generated internally using a direct digital synthesizer (DDS). In external mode, you can select between either direct or phase-locked options. In direct external mode, the input signal is demodulated using the reference input signal for single-phase demodulation (X). The phase-locked loop option reconstructs two orthogonal references that are phase-locked to the reference input signal to support external dual-phase demodulation (XY/Rθ). Additionally, the mixer stage can be bypassed for additional closed-loop control applications.

Integrated PID controller, oscilloscope, and data logger

Monitor up to two signals at a time using the Lock-in Amplifier’s integrated 2 channel, 125 MSa/s oscilloscope, and continuously log data at up to 1 MSa/s using its built-in data logger. Additionally, the PID controller provides real-time control over proportional, integral, and derivative gain profiles with configurable saturation.

Available on Moku:Go hardware

A powerful FPGA paired with a high-quality analog front-end make Moku:Go the most robust hardware in education, capable of complex, real-time digital signal processing. Integrated WiFi hotspot and programmable power supplies ensure that students have the complete solution they need all four years (and beyond).