SAC & FAR testing requirements per the CISPR16 standards

Is 3-metre SAC-testing in a 2-metre volume within standards? Our experts, Uliana Trucchi and Dmitriy Penkin, will inform you about the sometimes confusing chamber design criteria for major standards (CISPR16, CISPR25 and ETSI) in three different posts. This week: Semi Anechoic Chamber (SAC) & Fully Anechoic Room (FAR) testing requirements per the CISPR16 standards.

Dmitriy: “As you can see in the table, a direct relation between maximum EUT dimensions versus test distance is established in the recent CISPR16 standards. We noticed that there is some puzzlement about these criteria.”
 
Uliana: “One of the questions I receive regularly is if 3-metre SAC-testing in a 2-metre volume is within the CISPR16 standards. It is, strictly speaking, not: to be able to conduct accredited measurements, you shall meet EUT-related limitations shown in the table. Hence, we must specify the client’s testing needs before designing a chamber. Then, we can consult them on the many standards and which design needs to be executed. But still, a lot of clients make the conversion from testing needs to chamber specifications themselves, which might result in a chamber that will not be set up according to the proper standards.”
 
Are you considering investing in a Semi-Anechoic Chamber (SAC) or a Fully Anechoic Room (FAR)? Please contact Uliana Trucchi for a free consultation about the latest testing and design requirements. It’s better to be safe than sorry.
 
In the next post on design criteria, we will take a deep dive into CISPR25.

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