Partially lining is not compliant with ETSI for testhouses

“Any test house in the world must always be compliant to the letter, which means for ETSI and CISPR25 respecting the reflectivity limit lines of this graph,” says Uliana Trucchi, one of our technical consultants with over thirty years of experience in the business.

“The problem is that suppliers of test chambers often propose partially lined hybrid solutions to test houses that will meet the RSM test for ETSI and the LWM test for CISPR25, but do not respect the absorber reflectivity levels demanded by those standards, which imply full hybrid lining, and in the case of ETSI, 1 meter clearance in height between tip of antenna and tips of absorbers. They inform their clients that the risks are minimal or, based on their experience, the chamber is likely to pass the accreditation. However, the responsibility always lies with the test house, which can lead to costly problems.”

How can we resolve this misunderstanding?
Uliana: “Test houses should always consult their objective accreditation body before purchasing a chamber. Even if the chamber supplier claims it will be fine, the test house always bears the final responsibility and risks. And why take the risk?”

What if the test house has a partially aligned chamber and wants to perform the ETSI or CISPR-25 tests?
Uliana: “If you already have a chamber, we can upgrade it by covering the walls and ceiling completely. People can send me a message via LinkedIn if they need guidance.”

Share This Post

More To Explore

Martijn Fokker rejoins our design department

This is a man who loves the impossible. After seven years, we welcome Martijn Fokker back to the Comtest family. “I have been working at Comtest for 16 years and thought it was time for something different, but there’s something about these chamber projects that kept me coming back,” says Martijn.

A record-breaking anechoic test chamber

This huge anechoic chamber has a 10m test distance, making it one of the largest in our 40-year history. It was installed by our RFT-Systems representatives in Asia. Their General Manager, Luo Yuxiang, gladly shares the chamber’s specifications.

Our services include maintenance and validated testing. We recommend that both are executed by authorized personnel only. Our expert teams can perform preventive maintenance on RF-shielded doors, mode-stirrer systems, and positioning equipment such as turntables. We also offer validation services to see if your EMC test chamber or RF-shielded room still functions within its intended limits and avoiding unexpected down-time or product recalls at the same time.

Our services include maintenance and validated testing. We recommend that both are executed by authorized personnel only. Our expert teams can perform preventive maintenance on RF-shielded doors, mode-stirrer systems, and positioning equipment such as turntables. We also offer validation services to see if your EMC test chamber or RF-shielded room still functions within its intended limits and avoiding unexpected down-time or product recalls at the same time.

A shielded room can perform conducted emission and immunity EMC measurements, eliminating harmful external influences, leading to more accurate and consistent test results. Being a Faraday cage, a shielded room will not only improve test results but will also form an excellent aid in protecting information and essential hardware. Comtest can assist governments, the military, financial institutions, and large corporations in protecting what matters most in critical situations. We offer the highest quality, sensitivity, and security before, during and after working with you.

A shielded room can perform conducted emission and immunity EMC measurements, eliminating harmful external influences, leading to more accurate and consistent test results. Being a Faraday cage, a shielded room will not only improve test results but will also form an excellent aid in protecting information and essential hardware. Comtest can assist governments, the military, financial institutions, and large corporations in protecting what matters most in critical situations. We offer the highest quality, sensitivity, and security before, during and after working with you.

Comtest has been building high-quality antenna test ranges for more than 20 years. We are dedicated to putting our experience to work for you, turning any problem you might have into a customized test solution. As for researching and developing your products, we know speed and return on investment are very important. That’s why we ensure your project is delivered on schedule, on budget and exactly as ordered.

Comtest has been building high-quality antenna test ranges for more than 20 years. We are dedicated to putting our experience to work for you, turning any problem you might have into a customized test solution. As for researching and developing your products, we know speed and return on investment are very important. That’s why we ensure your project is delivered on schedule, on budget and exactly as ordered.

Comtest offers semi and full anechoic chambers that shield almost 100% of ambient emissions and reflect minimal internal radiation. We deliver or build your custom test chamber at your location, depending on what size chamber you need. If you tell us your challenges, we’ll offer a tailored turnkey solution from design to installation, including upgrades and yearly certifications.

We are committed to helping you achieve the best EMC testing possible. 

Comtest offers semi and full anechoic chambers that shield almost 100% of ambient emissions and reflect minimal internal radiation. We deliver or build your custom test chamber at your location, depending on what size chamber you need. If you tell us your challenges, we’ll offer a tailored turnkey solution from design to installation, including upgrades and yearly certifications.

We are committed to helping you achieve the best EMC testing possible.Â