Software helps engineers measure three-phase power, view electrical signals at the same time, and find problems in power systems, motor drives, and inverters.
Rohde & Schwarz has introduced the R&S MXO-K333 software option, bringing dedicated three-phase power analysis to its MXO series oscilloscopes. Instead of displaying only calculated power values, the software keeps voltage and current waveforms visible throughout the measurement, allowing engineers to compare power measurements with real-time signal behavior while debugging AC power systems, motor drives and inverters.
The software is available for all four-channel and eight-channel models of the MXO 3, MXO 4, MXO 5 and MXO 5C oscilloscopes. It supports voltage and current measurements in three-phase AC systems while allowing users to continue using other oscilloscope features such as math functions, spectrum analysis, measurement tracking and zone triggering during analysis.
A guided setup wizard helps users assign oscilloscope channels to voltage and current probes, verifies the connections and supports common two-wire, three-wire and four-wire configurations, including 2V2A, 3V3A and 3VN3A. Once configured, the software performs cycle-by-cycle calculations of RMS voltage and current, active power, reactive power, total power and power factor. It can also calculate three-phase system efficiency by comparing input and output power. Additional tools include phasor diagrams, harmonic analysis and total harmonic distortion (THD) measurements compliant with IEC 61000-3-2 and MIL-STD-1399.
Because the measurements are integrated into the oscilloscope, engineers can examine power values alongside voltage and current waveforms, switching events, transients, control signals and communication activity without changing instruments. The software also works with the MXO series’ advanced triggering, FFT, automated measurements, track functions and protocol decoding, helping users identify the source of power-related issues during development and testing.
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