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
    • FCC Parts 15 and 18
    • EN 50147-2
    • CISPR 11 / EN550011
    • CISPR 16 / EN550016
    • CISPR 22 / EN550022
    • VCCI V-3 / 2003.04
    • SAE J551
    • SAE J1113 (Requires Chamber Modification to Accommodate Full Vehicle)
  • Full Compliance Testing for Radiated Immunity:
    • IEC 61000-4-3 / EN61000-4-3
    • SAE J551
    • SAE J1113
  • Eligible for FCC 3 Meter Class B Facility Filing
  • Available Performance Options: (May Require Chamber Modifications)
    • ± 4.0 dB per ANSI C63.4
    • Plus ± 3.5 dB per ANSI C63.4
    • Premium ± 3.0 dB per ANSI C63.4
  • Available as a Turnkey Package:
    • Chamber, Tower, Turntable, Antennas, Instrumentation and Software


ETS-Lindgren FACT 3 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 3 chambers are designed to provide customers with more standardized solutions for different quiet zone diameters and performance options. This will provide users more flexibility to choose which solution works best for their individual needs. The available quiet zone sizes are available up to 2.0 meters in diameter. ETS-Lindgren’s Fact 3 chambers can be used to perform full compliance testing for ANSI C63.4, FCC Parts 15 and 18, EN 50147-2, CISPR 11 / EN 55011, CISPR 16 / EN55016, CISPR 22 / EN55022, VCCI V-3/2003.04, SAE J551 and SAE J1113. 

ETS-Lindgren guarantees that the performance of Normalized Site Attenuation testing according to ANSI C63.4, is ± 4.0 dB for STANDARD chamber, ± 3.5 dB for STANDARD PLUS chamber and ± 3.0 dB for PREMIUM chamber over the frequency range of 30 MHz to 1 GHz. The guaranteed sVSWR performance for frequency range of 1 GHz to 18 GHz is 6.0 dB, regardless which performance option is selected and better performance is achievable with chamber modifications.

Radiated Immunity Testing

ETS-Lindgren’s FACT 3 chambers can also be used to perform full compliance testing for IEC 61000-4-3/EN61000-4-3, SAE J-551 requirements. At FACT 3 range lengths, field uniformity of 0 – 6 dB is achieved in the test aperture over the frequency range of 26 MHz to 18 GHz. At FACT 3 range lengths, test aperture is a vertical plane of 1.5 m x 1.5 m at an elevation of 0.8 m to 2.3 m above the ground plane and field uniformity of 0 – 6 dB is achieved in the test aperture over the frequency range of 80 MHz to 18 GHz, following the field uniformity test procedure of IEC 61000-4-3. Additionally, DuraSorb can safely withstand continuous field intensity of up to 200 V/m and intermittent field intensity of 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 wellknown brands as Rantec absorber, RayProof Series 81 and Euroshield shielding and RF doors, Holaday Probes, 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 “Total Solution, Single Source”TM approach simplifies complex decisions and gives you peace of mind with a single source of responsibility.