Absorber Lined Shielding Enclosure Measurements

ALSE - Seibersdorf Labor GmbH (Radio-Frequency Engineering)

Due to on-going work in the standardization committee CISPR D (responsible for CISPR 25) the latest issue CISPR 25 Ed. 4.0 has not been cited to-date. In the meantime we are able to offer two different validation procedures:

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Site Validation

Seibersdorf Labor GmbH

The testing and performance evaluation of EMC test sites requires precision field-strength measurements. Seibersdorf is the European market leader in this business.

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Effectiveness

Shielding - Seibersdorf Labor GmbH

The Sielding Effectiveness (SE) is measured in accordance withMil-Std. 285, NSA 65-6 and EN 50147 1.

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Measurement

Field Uniformity - Seibersdorf Labor GmbH

The purpose of our measurement is to characterise the properties (uniform field area, UFA) of the anechoic room according to IEC 61000-4-3 Ed. 3.1 b or EN 61000 4 3.

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Measurement

Site VSWR - Seibersdorf Labor GmbH

The Site VSWR measurement is done according to CISPR 16-1-4 in the frequency range from 1 GHz to 18 GHz using broadband omni directional antennas in horizontal and vertical polarisation. The volumetric test method is applied (test volume needs to be specified), test distance 3 m - any other distance upon request. The ground plane has to be covered with absorbing material.

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Measurement

Ambient Noise - Seibersdorf Labor GmbH

The Ambient Noise (AN) measurement is done in accordance with CISPR 22 and EN 50022

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Normalised Site Attenuation

NSA - Seibersdorf Labor GmbH

Normalised Site Attenuation (NSA) is measured in accordance with CISPR 16-1-4 and ANSI C63.4 in semi and fully anechoic environment.

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Validation

Freespace VSWR - Seibersdorf Labor GmbH

The Free Space VSWR validation is done according to J.S. Hollis, T.J. Lyon, L. Clayton: "Microwave Antenna Measurement", Scientific-Atlanta Inc., Atlanta, Georgia, USA, July 1970.

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Validation

Table Influence (TI) - Seibersdorf Labor GmbH

The Table Influence (TI) is measured according to CISPR 16-1-4 in the frequency range 200 MHz 18 GHz.

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