Phase precision
6 µradians/√Hz

Bandwidth (up to)
10 kHz

Frequency range
1 kHz to 200 MHz

Data Logger

Moku:Lab’s Phasemeter measures phase of up to two input signals with better than 6 µradian precision from 1 kHz up to 200 MHz. Based on a digitally implemented phase-locked loop architecture, Moku:Lab’s phasemeter provides exceptional dynamic range, zero dead-time and measurement precision that exceeds the performance of conventional lock-in amplifiers and frequency counters.


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

Phase-locked output option enables you to generate sine waves that are phase-locked to the inputs

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

Flexible signal tracking options
Phase-locked loop tracking bandwidths from 10 Hz (great for tracking low SNR signals) up to 10 kHz (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

App Notes
Measuring Allan Deviation


Input frequency range
1 kHz – 200 MHz (auto-acquire or manually specify)

Frequency set-point precision
3.55 µHz

Tracking bandwidth
10 Hz, 40 Hz, 150 Hz, 600 Hz,
2.5 kHz, 10 kHz

Frequency precision
Up to 10 µHz/√Hz

Phase precision
Up to 100 nanocycles /√Hz

Data logging rates
30.5 Hz, 122 Hz, 488 Hz, 1.95 kHz, 15.6 kHz, 125 kHz

Sine wave generators
Dual channel 250 MHz (manual or input-locked)

Moku:Lab Spec Sheet

Phasemeter Datasheet

Phasemeter User Manual

Software integrations

Track your signal’s phase, frequency, and amplitude, all from an
intuitive iPad interface, or with Python, MATLAB, and LabVIEW.

Simultaneously measure
phase, frequency and

Based on a phase-locked loop architecture, Moku:Lab’s Phasemeter measures the phase, frequency and amplitude of an input signal at the same time.

Auto-acquisition mode

In auto-acquisition mode, Moku:Lab’s Phasemeter will automatically detect and lock to the tone with the greatest magnitude with better than 100 mHz accuracy.

Phase-locked outputs

Generate up to two DC to 200 MHz sinewaves with the option to phase-lock them to their corresponding input signal.

Realtime spectral analysis

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

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