ETS-Lindgren FACT™ (Free-space Anechoic Chamber Test-site) Chambers offer semi-anechoic radiated emissions (RE) and fully anechoic radiated immunity (RI) compliance test capability for most international EMC compliance regulations. The chamber’s small overall size results from the use of brand hybrid absorber and ferrite tile, which require less volumetric space than traditional absorbers. ETS-Lindgren FACT chambers  available with 3meter, 5meter or 10meter test distance with various size of turntables. 

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Key Features

  • 26 MHz – 18 GHz Frequency Range
  • Full Compliance Testing for Radiated Emissions:
    • ANSI C63.4 Parts 15 & 18
    • EN 50147-2
    • CISPR 11/ EN55011
    • CISPR 16/ EN55016
    • CISPR 22/ EN55022
    • Bellcore GR-1089
    • SAE J551
  • Full Compliance Testing for Radiated Immunity:
    • IEC 61000-4-3/EN61000-4-3
    • ENV 50140
    • SAE J-1113
  • Eligible for FCC 3 Meter Class A & B (3 m and 10 m test methods) Facility Filing
  • Choice of 3 m, 4 m or 6 m Quiet Zone
  • Available as a Turnkey Package: Chamber, Tower, Turntable, Antennas, Instrumentation and Software


FACT 10 chambers achieve their broadband performance using a unique arrangement of hybrid and ferrite tile absorber. The design was modeled using the proprietary numerical electromagnetic software responsible for creating chambers that set new standards for anechoic performance.

Radiated Emissions Testing

ETS-Lindgren’s FACT 10 chambers can be used to perform full compliance testing for ANSI C63.4 (FCC part 15 & 18), EN 50147-2, CISPR 11/EN55011, CISPR 16/EN55016, CISPR 22/ EN55022, Bellcore GR-1089, and SAE J551 (component and full vehicle) testing requirements. At 10 m test distance, ETS-Lindgren guarantees a Normalized Site Attenuation (NSA) deviation better than ± 4.0 dB from theoretical NSA within a cylindrical quiet zone of 3 m, 4 m, and 6 m diameters over the frequency range of 30 MHz to 1 GHz. The quiet zone at 3 m and 5 m test distance is a cylinder up to 2.0 meters in diameter, following the volumetric test procedure of ANSI C63.4. Anticipating tomorrow’s requirements, the Durasorb hybrid absorber guarantees NSA performance of better than ± 4 dB deviation from theoretical NSA from 30 MHz to 1 GHz and sVSWR performance of better than 6 dB from 1 GHz to 18 GHz, using the test method defined in ANSI C63.4/CISPR 16.

Radiated Immunity Testing

ETS-Lindgren’s FACT 10 chambers can also be used to perform full compliance testing for IEC 61000-4-3/EN61000-4-3, ENV 50140 and SAE J-1113 requirements. At FACT-10TM range lengths, field uniformity of 0, + 6 dB is achieved in the test aperture over the frequency range of frequency range of 80 MHz to 18 GHz. The test aperture is a vertical plane 1.5 m x 1.5 m at an elevation of 0.8 m to 2.3 m above the ground plane, following the field uniformity test procedure of IEC 61000-4-3. An optional absorber treatment package is available which permits radiated immunity testing at frequencies up to 18 GHz with 0, +/- 6 dB field uniformity, following the test procedure of IEC 61000-4-3. Additionally, DSH1250H can safely withstand continuous field intensity up to 200 V/m and intermittent field intensity up to 500 V/m. This safely exceeds the field intensity requirements of most commercial RI tests.

Turnkey Systems

ETS-Lindgren is an integrated manufacturer producing such well known brands as DSH1250H, Series 81 and Euroshield shielding and RF doors, EMCO antennas, towers, turntables, and test accessories. All of our products are designed to work together for maximum efficiency and performance. In addition to providing performance, our approach simplifies complex decisions and gives you peace of mind with a single source of responsibility.