Timesaving functions with ESW EMI test receiver

6th April 2020

Alex Lynn

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The Rohde & Schwarz ESW is an EMI test receiver with outstanding RF characteristics for the measuring range from 1Hz to 44GHz. With its high dynamic range und measurement accuracy, it meets the highest requirements in EMI compliance testing and fulfils the most stringent requirements for all relevant EMI standards such as CISPR, EN, MIL‑STD-461, DO‑160 and FCC.

With the conventional integrated FFT based time domain scan the R&S ESW captured and weighted disturbance spectra already very fast. The new fast time domain scan (fast TDS) doubles the scan bandwidth, so the measurement speed is nearly twice as fast as with a conventional time domain scan.

This enables previously unattainable fast measurement times for time-consuming tests with the CISPR detectors quasi-peak and CISPR average. TDS is available free with the actual firmware version V1.70 for the R&S ESW.

The also new R&S ESW-K58 multi CISPR APD measurement option enhances the single amplitude probability distribution (APD) measurement function into a simultaneous analysis of up to 67 channels within a specified timeframe.

The option inspects for each channel of a signal the probability of occurring amplitudes. The option offers numerous analysis and display features, including a 3D view. The current CISPR 11 standard allows multi CISPR APD for testing microwave ovens, which considerably simplifies the measurement process. When the method is used in line with the standard for signals with 1MHz bandwidth, with the R&S ESW can be measured simultaneously up to 20 channels.

Thus, the EMI test receiver surpasses by far the standard requirement of just five channels guaranteeing a safe investment for users. APD analysis precisely shows the effects of interference on digital communication systems (e.g. WLAN or cellular), and in the future it will also be applied to other product standards.