A digital measurement station for RF conducted emissions monitoring

Capua, C. De; Landi, C.; Malafronte, G.C.

doi:10.1109/imtc.2001.928232

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…Completely different approaches, which are based on the acquisition of the EUT emissions, have been recently investigated [3], [4] in order to emulate the receiver behavior. A simple approach is based on a digitizer, that samples the LISN output, and on a numerical processor that performs the spectrum analysis of the acquired signal.…”

Section: Compliance and Precompliance Tests For Conducted Emissionsmentioning

confidence: 99%

“…In this example the peak spectrum exceeds the band B limit at low frequencies, so further tests have to be performed with a spectrum analyzer equipped with a quasi-peak detector to asses the DUT conformity. One should note that, in this specific condition, since a complete description of the disturbance signal is available, it would be possible to employ the proposed test-set not only to estimate the spectrum peak, but also to estimate the quasi-peak spectrum by employing a numerical algorithm similar to the one described in [4].…”

Section: Test #3: Dimmer Regulator Emission Analysismentioning

confidence: 99%

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A precompliance EMC test-set based on a sampling oscilloscope

Parvis

Perrone

Vallan

2003

IEEE Trans. Instrum. Meas.

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In this paper, a precompliance test-set for the measurement of conducted emissions based on a medium-level sampling oscilloscope and on a fast filtering algorithm is presented. This system has been designed as a low-cost alternative to the typical precompliance test-sets that are based on spectrum analyzers equipped with EMC filters and peak detectors. Experimental examples of the results obtained using a sampling oscilloscope with 8 kbytes of memory are given.

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Section: Compliance and Precompliance Tests For Conducted Emissionsmentioning

confidence: 99%

Section: Test #3: Dimmer Regulator Emission Analysismentioning

confidence: 99%

A precompliance EMC test-set based on a sampling oscilloscope

Parvis

Perrone

Vallan

2003

IEEE Trans. Instrum. Meas.

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“…In the past, digital sampling oscilloscopes (DSOs) have been used successfully for conducted emission tests below 30 MHz [2][3]. A fully compliant broadband time-domain measurement system, usable up to 1 GHz, with a nonlinear ADC structure is presented in [4].…”

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confidence: 99%

Improving the Performance of Direct-Conversion SDRs for Radiated Precompliance Measurements

Spindelberger

Arthaber

2023

IEEE Lett. on Electromagn. Compat. Pract. and Appl.

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In this paper, a highly linear frontend to improve the performance of (software-defined radios) SDRs for radiated precompliance measurements is presented. In CISPR band C/D, the test receiver needs to fulfill stringent requirements for using the quasi-peak detector. Usually, an expensive preselection filter bank is necessary to make fully compliant measurements of broadband transients. Direct-conversion based SDRs show a limited out-ofthe-box performance for pre-compliance measurements caused by, e.g., harmonic mixing and saturation effects. With the use of a triple-balanced mixer, a highly linear up-conversion stage is built, eliminating the need for a filter bank. The dynamic range requirements for the SDR are strongly reduced by a narrowband intermediate frequency filter, making CISPR 16-1-1 compliant measurements possible. The sensitivity of the frontend is comparable to professional receivers on the market, although no low-noise amplifier is implemented. The performance is verified by continuous wave and transient signals according to CISPR norms. The broadband measurement results are compared with traditional characterizations of the dynamic range using the compression level and the noise figure. It shows that assumptions on the RF-link budget for a compliant design can be made with continuous wave measurements. Based on our results, the requirements for the SDR frontend are derived. Index Terms-software-defined radio (SDR), electromagnetic compatibility (EMC), electromagnetic interference (EMI), CISPR I. INTRODUCTIONThe direct-conversion receiver (DCR) enables frequency downconversion without the necessity of preselection filtering. The basic topology consists of a single mixer stage and anti-aliasing filters. Due to its simple structure, it is often utilized for low-cost applications, e.g., software-defined radios (SDRs). Typically, such receivers are highly configurable and applicable to many different use-cases. In this paper, the focus is put on the performance improvement of SDRs for radiated pre-compliance measurements in CISPR band C/D.In CISPR 16-1-1, highly demanding requirements for electromagnetic interference (EMI) receivers are specified [1]. Broadband impulses, being flat up to 1 GHz, must be measured and weighted in terms of repetition rates using different detectors. Below

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“…Different approaches, which are based on the acquisition of the EUT emissions, have been recently investigated [3] [4] in order to emulate quasi-peak receivers. A common approach is based on a digitizer, that samples the LISN output, and on a numerical processor that performs the spectrum analysis of the acquired signal.…”

Section: Mainsmentioning

confidence: 99%

A precompliance EMC test-set based on a sampling oscilloscope

Parvis

Perrone

Vallan

IMTC/2002. Proceedings of the 19th IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.00CH37276)

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A Imu-cost EMCprecompliance test-set is essential to reduce the development costs of any electrical device. In this paper a precompliance test-set which is based on a genemlputpose sampling oscihscope and on a fast$liering algorithm is presented This system hns been designed as a lowcost altentnfive to the typical precompliance test-sets for the measurement of conducted emissions that are based on spectrum analyzers equipped with EMC jilters and peak detectors. An experimental example of the results obtained with a sampling oscilloscope equipped with 8 kbyte of memory is given.

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A digital measurement station for RF conducted emissions monitoring

Cited by 5 publications

References 4 publications

A precompliance EMC test-set based on a sampling oscilloscope

A precompliance EMC test-set based on a sampling oscilloscope

Improving the Performance of Direct-Conversion SDRs for Radiated Precompliance Measurements

A precompliance EMC test-set based on a sampling oscilloscope

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