Lock-in Amplifier

One of twelve instruments available on Moku:Lab

Lock-in Amplifier

One of twelve instruments
available on Moku:Lab

Bandwidth

200 MHz

Dual-phase

XY / Rθ

Input voltage noise

30 nV/√Hz

Dynamic reserve

120 dB

How can we assist?

How can we assist?

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.

Features

Measure signals obscured by noise with more than 120 dB dynamic reserve
Block diagram view of the digital signal processing chain
Built-in probe points for signal monitoring and data logging
Internal or external demodulation modes including a PLL (phase-locked loop)
Dual-phase demodulation
Toggle between rectangular (X/Y mode) or polar coordinates (R/Theta mode)
Built-in PID Controller

Specifications

Demodulate with frequencies ranging from 1 mHz to 200 MHz with 3.55 μHz resolution
Phase shift precision of 0.001°
50 Ω / 1 MΩ input impedance
Adjustable time constant from 32 ns to 0.537 s
6, 12, 18, or 32 dB/octave filter roll-off
Output gain range: -80 to +160 dB
LO output up to 200 MHz with variable amplitude
Ultra-fast data acquisition: snapshot mode up to 500 MS/s, continuous mode up to 1 MS/s

Lock-in Amplifier overview

Features

Measure signals obscured by noise with more than 120 dB dynamic reserve
Block diagram view of the digital signal processing chain
Built-in probe points for signal monitoring and data logging
Internal or external demodulation modes including a PLL (phase-locked loop)
Dual-phase demodulation
Toggle between rectangular (X/Y mode) or polar coordinates (R/Theta mode)
Built-in PID Controller

Specifications

Demodulate with frequencies ranging from 1 mHz to 200 MHz with 3.55 μHz resolution
Phase shift precision of 0.001°
50 Ω / 1 MΩ input impedance
Adjustable time constant from 32 ns to 0.537 s
6, 12, 18, or 32 dB/octave filter roll-off
Output gain range: -80 to +160 dB
LO output up to 200 MHz with variable amplitude
Ultra-fast data acquisition: snapshot mode up to 500 MS/s, continuous mode up to 1 MS/s

Wirelessly configure and monitor your Lock-in's performance, all from an
intuitive iPad interface, or with Python, MATLAB, and LabVIEW.

Wirelessly configure and monitor your Lock-in's performance, all from an intuitive iPad interface, or with Python, MATLAB, and LabVIEW.

Flexible inputs

The Lock-in Amplifier’s signal and reference inputs can be configured for AC or DC coupling and 50 Ω or 1 MΩ input impedance.

Dual-phase demodulation

Moku:Lab’s Lock-in Amplifier features a dual-phase demodulator with cascaded single pole low-pass filters to attenuate the second harmonic and suppress noise in each quadrature.

Select between 6, 12, 18, and 24 dB / octave lowpass filter slopes
Select between rectangular (X/Y) and polar (R/θ) coordinate modes
View the demodulated in-phase and quadrature signals prior to the low-pass filters 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).

Integrated Oscilloscope

Monitor up to two signals at a time using the Lock-in Amplifier’s integrated 2 channel, 500 MSa/s oscilloscope, and continuously log data at up to 1 MSa/s using its in-built data logger.

PID Controller

Moku:Lab’s Lock-in Amplifier can serve as both a sensor and feedback controller with its built-in PID Controller. The PID controller provides real-time control over proportional, integral and derivative gain profiles with configurable saturation.

Take the guess-work out of configuring
your Lock-in amplifier

Stay on top of how your instrument is configured with a high-level view of the Lock-in amplifier’s signal processing chain and intuitive block-diagram interface.

Export data effortlessly

Export your data to Dropbox, SD Card, iCloud or e-mail. Moku:Lab can save an image of your screen or export your data in CSV or .MAT formats.

LabVIEW, Python, and MATLAB

Integrate Moku:Lab’s Lock-in Amplifier and its other instruments into your existing system using LabVIEW, Python, and MATLAB APIs.

Flexible inputs

The Lock-in Amplifier’s signal and reference inputs can be configured for AC or DC coupling and 50 Ω or 1 MΩ input impedance.

Dual-phase demodulation

Moku:Lab’s Lock-in Amplifier features a dual-phase demodulator with cascaded single pole low-pass filters to attenuate the second harmonic and suppress noise in each quadrature.

Select between 6, 12, 18, and 24 dB / octave lowpass filter slopes
Select between rectangular (X/Y) and polar (R/θ) coordinate modes
View the demodulated in-phase and quadrature signals prior to the low-pass filters using the integrated Oscilloscope

Internal and External References

Integrated Oscilloscope

Monitor up to two signals at a time using the Lock-in Amplifier’s integrated 2 channel, 500 MSa/s oscilloscope, and continuously log data at up to 1 MSa/s using its in-built data logger.

PID Controller

Take the guess-work out of configuring your Lock-in amplifier

Stay on top of how your instrument is configured with a high-level view of the Lock-in amplifier’s signal processing chain and intuitive block-diagram interface.

Dual-phase demodulation

Moku:Lab’s Lock-in Amplifier features a dual-phase demodulator with cascaded single pole low-pass filters to attenuate the second harmonic and suppress noise in each quadrature.

Export data effortlessly

Export your data to Dropbox, SD Card, iCloud or e-mail. Moku:Lab can save an image of your screen or export your data in CSV or .MAT formats.

LabVIEW, Python, and MATLAB

Integrate Moku:Lab’s Lock-in Amplifier and its other instruments into your existing system using LabVIEW, Python, and MATLAB APIs.

F.A.Q.

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 MS/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 kS/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 MS/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 goodies.

The Lock-in 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.

F.A.Q.

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 MS/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 kS/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 MS/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 goodies.

The Lock-in 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.