Electromagnetic compatibility testing in EMC lab EN 55032, CISPR 32
EN 55032:2015 Electromagnetic compatibility of multimedia equipment – Emission requirements (CISPR 32:2015)
Modified: CISPR 32:2015 Electromagnetic compatibility of multimedia equipment – Emission Requirements
Replace: EN 55032:2012+AC:2013 Electromagnetic compatibility of multimedia equipment – Emission requirements
International standard EN 55032:2015 applies to multimedia equipment (MME) having a rated r.m.s. AC or DC supply voltage not exceeding 600 V. Equipment within the scope of EN 55013 and EN 55022 and CISPR 13 and CISPR 22 is within the scope of EN 55032:2015. MME intended primarily for professional use also lies in the scope of EN 55032:2015. EN 55032:2015 does not contain any requirements for ‘in-situ’ testing. ‘In-situ’ testing is outside the scope of this standard.
International standard EN 55032:2015 divides equipment, devices and apparatus it two classes, depending on the environment where equipment will be used:
Class B- equipment that offers adequate protection to broadcast services in residential environment.
Class A- equipment that may not offer adequate protection to broadcast services within a residential environment.
Equipment intended primarily for use in a residential environment shall meet the Class B limits. All other equipment shall comply with the Class A limits. Class A equipment shall have the following warning in the instructions for use, to inform the user of the risk of operating this equipment in a residential environment:
|Warning: Operation of this equipment in a residential environment could cause radio interference.|
Multimedia equipment (MME):
• information technology equipment– equipment having a primary function of entry, storage, display, retrieval, transmission, processing, switching, or control of data and/or telecommunication messages and which may be equipped with one or more ports typically for information transfer. (Office machines, electronic business equipment and telecommunication equipment.)
• audio equipment– equipment which has a primary function of generation, input, storage, play, retrieval, transmission, reception, amplification, processing, switching or control of audio signals. (CD players, receivers, audio amplifiers, mixers.)
• video equipment– equipment which has a primary function of generation, input, storage, display, play, retrieval, transmission, reception, amplification, processing, switching, or control of video signals. (Video players, cameras, TV studio equipment.)
• broadcast receiver equipment– equipment containing a tuner that is intended for the reception of broadcast services. (Television and radio service receivers, terrestrial broadcast receivers.)
• satellite broadcast and/or cable transmission equipment
• entertainment lighting control equipment– equipment generating or processing electrical signals for controlling the intensity, color, nature or direction of the light from a luminaire, where the intention is to create artistic effects in theatrical, televisual or musical productions and visual presentations
• or combinations of upper mentioned equipment
This summary covers only requirements for radiated emissions in SAC in 3m distance, conducted emissions for AC power ports using AMN, nework ports using AAN. Other requirements are not summarised here.
Radiated emission requirements must be satisfied in frequency rage:
30MHz-1GHz if internal oscillator frequency is up to 108MHz
30MHz-2GHz if internal oscillator frequency is up to 500MHz
30MHz-5GHz if internal oscillator frequency is up to 1GHz
30MHz-6GHz if internal oscillator frequency is higher than 1GHz
30MHz-6GHz if internal oscillator frequency is unknown
Internal oscillator frequency– highest fundamental frequency generated or used within the EUT or highest frequency at which it operates. This also includes frequencies which are solely used within an integrated circuit.
Conducted emissions AC power port
Conducted emissions wired network port