Can Moku perform phase unwrapping demodulation
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Moku:Go
Moku:Go Arbitrary Waveform Generator Moku:Go Data Logger Moku:Go Frequency Response Analyzer Moku:Go Logic Analyzer & Pattern Generator Moku:Go Oscilloscope & Voltmeter Moku:Go PID Controller Moku:Go Spectrum Analyzer Moku:Go Waveform Generator Moku:Go Power Supplies Moku:Go Digital Filter Box Moku:Go FIR Filter Builder Moku:Go Lock-in Amplifier Moku:Go General Moku:Go Logic Analyzer/Pattern Generator Moku:Go Time & Frequency Analyzer Moku:Go Laser Lock Box Moku:Go Phasemeter
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Moku:Lab
Moku:Lab General Moku:Lab Arbitrary Waveform Generator Moku:Lab Data Logger Moku:Lab Digital Filter Box Moku:Lab FIR Filter Builder Moku:Lab Frequency Response Analyzer Moku:Lab Laser Lock Box Moku:Lab Lock-in Amplifier Moku:Lab Oscilloscope Moku:Lab Phasemeter Moku:Lab PID Controller Moku:Lab Spectrum Analyzer Moku:Lab Waveform Generator Moku:Lab Time & Frequency Analyzer Moku:Lab Logic Analyzer/Pattern Generator
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Moku:Pro
Moku:Pro Arbitrary Waveform Generator Moku:Pro Data Logger Moku:Pro Frequency Response Analyzer Moku:Pro Oscilloscope Moku:Pro PID Controller Moku:Pro Spectrum Analyzer Moku:Pro Waveform Generator Moku:Pro Lock-in Amplifier Moku:Pro Digital Filter Box Moku:Pro FIR Filter Builder Moku:Pro Phasemeter Moku:Pro Multi-instrument Mode Moku:Pro General Moku:Pro Logic Analyzer/Pattern Generator Moku:Pro Time & Frequency Analyzer
- Python API
- MATLAB API
- Arbitrary Waveform Generator
- Data Logger
- Digital Filter Box
- FIR Filter Builder
- Frequency Response Analyzer
- Laser Lock Box
- Lock-in Amplifier
- Oscilloscope
- Phasemeter
- PID Controller
- Spectrum Analyzer
- Time & Frequency Analyzer
- Waveform Generator
- Logic Analyzer & Pattern Generator
- Multi Instrument Mode
- Moku Cloud Compile
- Moku general
- LabVIEW
Lock-in Amplifier
Moku's Lock-in Amplifier currently does not support phase unwrapping. While it can output phase as the error signal, the phase detector is limited to one cycle of dynamic range.
![](https://static.helpjuice.com/helpjuice_production/uploads/upload/image/8143/direct/1720469977565-1720469977565.png)
![](https://static.helpjuice.com/helpjuice_production/uploads/upload/image/8143/direct/1720470216358/image.png)
This limitation arises because the effective range of the arctangent function is [-π, π]. When X changes sign, the Y/X ratio shifts from approximately -∞ to +∞, causing the arctangent to produce an abrupt change. To resolve this issue, we would need to collect the phase output from the Lock-in Amplifier and perform an unwrap operation using MATLAB's unwrap function.
![arctangent - Wiktionary, the free dictionary](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Arctangent.svg/1200px-Arctangent.svg.png)
Phasemeter
Moku's Phasemeter has phase unwrapping capabilities. The Phasemeter uses a phase-locked loop to track the phase of the input signal by integrating the phase change applied to the internal oscillator. This method differs from that of the Lock-in Amplifier and is immune to the phase changes caused by the arctangent's effective range limitations.
![](https://static.helpjuice.com/helpjuice_production/uploads/upload/image/8143/direct/1720476125852/image.png)
Frequency Response Analyzer
Moku's Frequency Response Analyzer has phase unwrapping capabilities as well. Although it is similar to a Lock-in Amplifier, the Frequency Response Analyzer includes an integrated unwrap function, similar to that of MATLAB. However, this unwrapped phase can be inaccurate if the signal is obscured by the noise floor, as phase changes can be incorrectly recognized in this situation, leading to significant phase errors.