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What is CISPR 32?

IEC Standards

What is CISPR 32? Where does this apply?  What are the limits and requirements specified by this standard?


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Editorial Team - EMC Directory

Aug 5, 2022

The CISPR 32 is an EMC standard for Multimedia Equipment (MME) in the supply range from 0 to 600 V AC/DC. This standard focuses to establish requirements that protect the radio spectrum from the interference of MME, allowing radio services to operate as intended in the frequency range from 9 kHz to 400 GHz. CISPR 32 also specifies procedures to ensure the reproducibility of measurements and consistency of the results from one testing laboratory to another. The MME includes audio, and video equipment such as smartphones, laptops, computers, mp3 players, wireless speakers, and entertainment lighting control equipment such as TVs, projectors, etc.

MME under CISPR 32 is classified into two categories:

  1. Class B: This category includes all MME and broadcasting MME (like TVs, radio transistors, and wireless speakers) used in residential areas. Class B limits are intended to offer adequate protection to broadcast services within the residential environment.
  2. Class A: Class A includes all MME which is not in Class B. Class A has more relaxed limits than Class B. 

The first edition of CISPR 32 was released in 2012. It established all the permissible limits and requirements of the MME. Classes A and B were also laid down in the premiere edition. The permissible limits are stated in Annex A. The standard CISPR 32 requires that the Equipment Under Test (EUT) should have emission limits either below Class A (more relaxed; non-residential) limits or Class B (more stringent; residential) limits. This edition also offered a choice of test methods, compliance could be shown by applying any one of the test methods using the appropriate limit. The first edition included several annexures to cover a variety of clauses such as requirements, exercising the EUT during measurement and test signal specifications, measurement procedures, instrumentation, supporting information, arrangement of EUT, local associated equipment, and associated cabling, pre-scan measurements, and more.

The second edition was released in 2015 and the latest amendment in 2019. Both these versions are still valid. This edition (and amendment) included the measurement of the outdoor unit of home satellite receiving systems and their permissible limits. It also included additional requirements using fully-anechoic rooms (FAR), the addition of new informative annexes covering GTEM and RVC, and numerous maintenance items addressed to improve the testing of MME.

Click here for CISPR 32 testing labs.

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