Lock-in Amplifier

Overview

Moku:Lab’s digital Lock-in Amplifier supports dual-phase demodulation (XY/Rθ) from DC to 200 MHz more than 120 dB of dynamic reserve. It also features an integrated 2‑channel oscilloscope and data logger, enabling you to observe signals at up to 500 MSa/s and log data at up to 1 MSa/s.

FAQ


Can I adjust the corner frequency of the low-pass filter?

Yes! It is adjustable from 300 mHz to 4.97 MHz via an iPad, Python or MATLAB.


What is the maximum rate at which I can save data, and how many points can I save?

The sample rate is dynamically adjusted by the horizontal zoom of the display, and can be set up to the full ADC sample rate of 500 MSa/s. Currently you can save 16k points for two channels simultaneously. For longer term data taking use the new data logging mode. Logging to .CSV is supported at up to 1 kSa/s. For faster data rates use the .li binary format which allows logging to SD card at up to 100 kS/s and logging to the Moku:Lab’s RAM at up to 1 MSa/s.


Can the Lock-in Amplifier demodulate using an external source?

Yes!! The September 2017 software update added support for direct demodulation with an external source, demodulation with a PLL (Phase-locked loop) locked to an external source, and the ability to modulate and demodulate at different frequencies.


Does the Lock-in include a PID controller for feedback applications?

Yes! A PID controller was added in the September 2017 update. Update your iPad App to get all the new capabilities.


The Lock-in Amplifier can readout I and Q (X and Y). What about R and theta?

Following the September 2017 free update, to switch from an X and Y readout to R and theta on the Moku:Lab App, tap the X Y block on the block diagram.