EMI debugging and analysis

EMI debugging and analysis

EMI debugging in the design phase will help keep product development on schedule

Detecting, analyzing, and correcting causes of electromagnetic interference (EMI) early in the development process is the surest way to successfully pass an EMI compliance test and the best way to avoid redesigns, delays, and added costs late in a project. EMI debugging for unwanted emissions can start as soon as a circuit is live.

Rohde & Schwarz supply multipurpose equipment including oscilloscopes with leading FFT functions, advanced trigger possibilities and very low input noise, and spectrum analyzers featuring high sensitivity and accuracy with EMI options to confidently measure both conducted and radiated emissions. Sensitive EMC near-field probes as input sources complement the product portfolio.

For more information please contact us.

EMI tests early in the development process avoid redesigns, delays and added cost in a project.
EMI tests early in the development process avoid redesigns, delays and added cost in a project.
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Oscilloscope or spectrum analyzer - which is the right instrument for EMI debugging?

Oscilloscopes and spectrum analyzers can be used to investigate disturbances from an electrical circuit. Their uses differ based on their measurement principles.

An oscilloscope acquires a wideband signal sample during a time interval. The acquired signal data can be represented either as a voltage over time or power over frequency, using Fast-Fourier Transformation (FFT). A spectrum analyzer sweeps with a narrowband filter over a selected frequency span and captures signal data that is applied to a weighting detector function for representation on the screen. The signal data is shown either over frequency or in zero span mode over time for a specified frequency.

By measuring over time with a wide bandwidth, an oscilloscope has the advantage of waiting until a selected signal property occurs, when it is then triggered to acquire signal data, greatly reducing the amount of data that has to be examined when searching for the cause of an error. The wide function range in a modern oscilloscope makes it essential for EMI debugging and every developer workbench has one. Spectrum analyzers have better frequency selectivity and higher dynamic range making them better at detecting very small signals, or signals very close in frequency to far larger signals. Some spectrum analyzers can also be equipped with specific EMI weighting detectors to capture values such as quasi-peak, or CISPR-average, which are essential for precompliance measurement.

For more information download the EMI Debugging with the R&S®RTO and R&S®RTE oscilloscope brochure.

Oscilloscope or spectrum analyzer - which is the right instrument for EMI debugging?
Oscilloscope or spectrum analyzer - which is the right instrument for EMI debugging?
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Related applications for EMI debugging & analysis

Optimizing EMI Input Filters for Switched Mode Power Supplies

Get a method to separate common-mode and differential-mode separation using two oscilloscope channels.

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Design for EMI testing step-by-step guide

In our free step-by-step guide, we break down the whole EMI design test process into “Locate”, “Capture”, and “Analyze”.

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Optimizing semiconductor switches to meet EMI compliance

Correlated time-frequency measurements help optimize gate performance and minimize electromagnetic emissions already during development.

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Shorten development times using an oscilloscope for EMI debugging

Powerful and easy-to-use FFT analysis capabilities for EMI debugging can save a lot of time and money.

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EMI analysis on power supply design

EMI analysis on power supply design

Design power supplies with EMI in mind and learn more about EMC standards and challenges with respect to new semiconductor technologies.

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EMI debugging

EMI debugging

This video shows how the R&S RTO oscilloscope can be used with a near- field probe to quickly and reliably find and fix EMI issues.

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Analyze EMI problems

High input sensitivity, high dynamic range and a powerful FFTare key features for capturing and analyzing unwanted emissions.

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EMI debugging at board level

A handheld spectrum analyzer with near-field probes offers a cost-efficient solution for quickly locating and analyzing EMI problems.

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EMI debugging a switched-mode power supply

Measuring radiated and conducted emissions with a spectrum analyzer.

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Testing IoT designs with focus on EMI debugging

Internet of things (IoT) solutions also need to fulfill EMC requirements; various EMI measurements need to be performed.

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