CISPR 25 Anechoic Chamber

(Vehicle EMC testing – Component/Module EMC Testing)

Do you design or manufacture electronic products used in automotive?

Do you want to perform EMC tests of your vehicles or components/modules according to CISPR 25?

With a new CISPR 25 EMC Anechoic Chamber, you will be able to perform EMC tests in house, shorten your product launch durations, and extend your EMC testing capability.

Let us design, supply, install and validate your new CISPR 25 EMC Anechoic Chamber.

Contact us and send your EMC requirements.


ALSE Requirements of CISPR 25

Since CISPR 25 includes radiated emissions tests, it requires anechoic chamber for ALSE (Absorber Lined Shielded Enclosure) test method. ALSE is defined as shielded enclosure/screened room with radio frequency-absorbing material on its internal ceiling and walls.

ALSE requirements are defined as follows:

For radiated emission measurements, however, the reflected energy can cause errors of as much as 20 dB. Therefore, it is necessary to apply RF absorber material to the walls and ceiling of a shielded enclosure that is to be used for radiated emissions measurements. No absorber material shall be placed on the floor for vehicle or component level tests. The following ALSE requirements shall also be met for performing radiated RF emissions measurements.

  • Performance of the absorption material shall be greater than or equal to 6 dB in the 70 MHz to 2500 MHz frequency range.
  • For radiated emissions tests, the shielded enclosure shall be of sufficient size to ensure that neither the vehicle/EUT nor the test antenna shall be closer than 1 m from the walls or ceiling, or to the nearest surface of the absorber material used thereon.
  • For radiated emissions measurements in particular, the ALSE shall be cleared of all items not pertinent to the tests. This is required in order to reduce any effect they may have on the measurement. Included are unnecessary equipment, cable racks, storage cabinets, desks, chairs, etc. Personnel not actively involved in the test shall be excluded from the ALSE.

Electronic products used in automotive industry are tested according to CISPR 25. It is also referred by UN ECE Regulation 10 and ISO 11452-2 standards. CISPR 25 chamber is a RF-shielded semi-anechoic chamber providing an ideal environment for compliant CISPR 25 testing. 

What are the specifications of CISPR 25 Chamber we offer?

We are offering CISPR 25:2021 compliant anechoic chamber to fulfil ALSE requirements of the standard. RF experienced design team is designing the anechoic chamber. We are supplying the items to your address, installing with experienced team, validating with third party agencies and instrumenating with EMC test systems. Contact us if you need any of these services. 

Semi Anechoic Chamber (SAC) compliant with CISPR 25, is specifically designed for CISPR 25:2016 and ISO 11452-2 measurements of automotive components with maximum dimension up to 1 meter. This chamber is made of self standing shielding, ferrite tiles and RF absorbers on all walls and ceiling with reflective ground plane. Specifications and features of the CISPR 25 anechoic chamber we offer shown below.

External dimension 5.5m x 5.5m x 3.5m (LxWxH)
Load capacity 1500 Kg (Minimum), Higher load capacity option available
Frequency range 30 MHz to 40 GHz
ANSI C63.4 Compliance  Yes
CISPR 16 Compliance Yes
Normalised site attenuation deviation (NSA) better than  ±3.5 dB between from 30MHz to 1 GHz sVSWR deviation better than ±5.5 dB from 1 GHz to 18 GHz.
IEC/EN 61000-4-3 Compliance Yes
Field Uniformity deviation better than 6 dB at 75% of 16 measuring points from 26 MHz/ 80 MHz to 18 GHz


Which tests are done in CISPR 25 Anechoic Chambers?

Radiated Emissions tests are performed CISPR 25 Anechoic Chambers. On CISPR 25, there are three ways of performing radiated emissions tests: ALSE method, TEM Cell method and Stripline method. ALSE method is for radiated emissions tests in a CISPR 25 compliant anechoic chamber.

You can either test a component/module or whole vehicle in a chamber. By using ALSE, these measurements are done according to CISPR 25:

  • Radiated emissions from components/modules (30 MHz to 5.925 GHz)
  • Vehicle radiated emissions (30 MHz to 5.925 GHz)
  • Equipment noise measurement in the AM/FM range (with vehicle)
  • Antenna noise measurement in the AM/FM range (with vehicle)

Peak, Quasi-Peak and Average limits for each emissions test. The product has to emit under these limits. In order to perform emission tests you also need emission test system. For Radiated Emissions tests, test system consists of antennas, RF cables and connectors, EMI receiver, spectrum analyzer and test software.

What we offer?

We are offering these CISPR 25 anechoic chambers and related services for automotive:

  • CISPR 25 compliant EMC anechoic test chamber / ALSE for Vehicle testing
  • CISPR 25 compliant EMC anechoic test chamber / ALSE for Electronic Sub Assembly (ESA) / Component testing
  • CISPR 25 compliant EMC test systems, equipments and software
  • On-site Services for CISPR 25 anechoic chambers (Worldwide Installation, Relocation, Refurbsihment, Validation Services)
  • Turn-key CISPR 25 EMC Test Laboratory
  • On-site training services (CISPR 25 standard training and practical laboratory testing training)
  • Online training services (CISPR 25 standard training)

Get Quote for EMC Anechoic Chambers

We are offering design, supply, installation, validation and instrumentation services for EMC Anechoic Chambers as a turnkey solution.

  • Semi Anechoic Chamber (SAC), Fully Anechoic Chamber (FAC), Antenna Anechoic Chamber, RTCA DO-160 Chamber, UN ECE R10, CISPR 16, CISPR 32, CISPR 14-1, CISPR 12, CISPR 25 and ISO 11452-2 Chambers.

  • Worldwide installation.

  • Validated by third party, independent and accredited calibration laboratories. 

Do you have any questions or want to get a quote from us? Fill the form below with your message and send it to us. 


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Registered address: 22 Northumberland Road, Ballsbridge, Dublin 4. D04 ED73 Ireland