Moku:Pro Phasemeter

Compare all phasemeters


The Moku:Pro Phasemeter measures phase (relative to a reference clock) of up to four input signals with better than 6 μradian precision from 1 kHz up to 300 MHz. Based on a digitally implemented phase-locked loop architecture, the Moku:Pro Phasemeter provides exceptional dynamic range, zero dead time, and measurement precision that exceeds the performance of conventional lock-in amplifiers and frequency counters.



Input frequency range
1 kHz – 300 MHz

Tracking bandwidth
• 1 Hz
• 10 Hz
• 100 Hz
• 1 kHz
• 10 kHz
• 100 kHz
• 1 MHz

Data acquisition rates
• 37 Hz
• 150 Hz
• 596 Hz
• 2.4 kHz
• 19.1 kHz
• 152 kHz

Input voltage range
400 mVpp, 4 Vpp, or 40 Vpp

Phase precision
Up to 6 μrad/√Hz

Frequency set-point precision
1 µHz

Frequency precision
Up to f x 10 µHz/√Hz, f = Fourier frequency

Key features

Four independent phasemeter channels with output options
Track and record the phase, frequency, and amplitude of four independent signals

Phase-locked output option enables you to generate sine waves that are phase-locked to the inputs, or drive measured phase to output with V/cycle setting and phase wrap options

Drive measured amplitude, phase, or frequency offset for closed-loop control systems

Real-time data analysis support
Real-time spectral analysis to display and save Power Spectral Densities, Amplitude Spectral Densities, Allan Deviation, and more

Output frequency multiplier
0.125x to 250x (phase-locked to input)

Flexible signal tracking options
Phase-locked loop tracking bandwidths from 1 Hz (great for tracking low SNR signals) up to 1 MHz (ideal for signals with large dynamics)

Free-wheeling mode intelligently holds the loop state when the signal fades unexpectedly and automatically re-engages when it returns


Oscillator analysis

Optical/ultrasound ranging

Gravitational wave detection


Phase-locked loop

Directed energy


Moku:Pro Spec Sheet

Moku:Pro Datasheet
Moku:Pro’s Phasemeter Datasheet

User Manual
Moku:Pro’s Phasemeter User Manual

App Notes
Moku:Go Lab Tutorial - Buck Converter Analysis

Software & APIs

Wirelessly configure and monitor your setup's performance from intuitive Moku software for iPad, Windows, or Mac, or with APIs for Python and MATLAB.
Phasemeter (Moku:Pro)

Intuitive software and API integration

Moku: app for iPadOS provides a clear and dynamic user experience, making configuring, modifying, and debugging your setup easy.

API integration with Python and MATLAB allows straightforward automation of Moku:Pro in complex setups or for repetitive tasks.

Try the software
Phasemeter (Moku:Pro)

Simultaneously measure phase, frequency, and amplitude

With a phase-locked loop architecture, the Moku:Pro Phasemeter continuously tracks the phase, frequency, and amplitude of an input signal at the same time.

Phasemeter (Moku:Pro)

Real-time spectral analysis

Analyze measurements in the time and frequency domains, including Allan deviation, power, and amplitude spectral densities.


Available on Moku:Pro hardware

Our most powerful hardware platform to date, Moku:Pro harnesses the power of a Xilinx Ultrascale+ FPGA with higher bandwidth, lower noise, more channels, and more output power than ever before.