Industry White Paper

Comparison of Time Domain Scans and Stepped Frequency Scans in EMI Test Receivers

October 08, 2020 by Rohde & Schwarz

Whitepaper Overview

During product development, the frequency spectra of disturbances need to be measured frequently and compared against the limits set in current product standards. The effectiveness of the instrument's shielding is checked by an EMC engineer. Being able to have the measurement results available quickly streamlines efforts to shield the instrument efficiently and reduces the time to market.

The introduction of spectrum measurements based on fast Fourier transform (FFT) – also known as a time domain scan – allows a significant reduction in measurement times without affecting accuracy. The CISPR, the International Special Committee on Radio Interference, has embraced this new technology.

In this Rohde & Schwarz white paper, learn about a CISPR 16-1-1- compliant test instrument with time domain scanning capabilities, as well as a comparison between the measurement speed and level measurement accuracy of a conventional stepped frequency scan versus an advanced FFT-based time domain scan.

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