CISPR 22 is an international standard for the measurement of electromagnetic compatibility (EMC) in information technology equipment. The standard provides requirements for the measurement of radiated and conducted emissions and immunity, and it is widely used in the industry for the evaluation of EMC performance in information technology equipment.
Shielding effectiveness testing is an important aspect of CISPR 22, as it is used to evaluate the ability of electronic equipment and its associated components, such as enclosures and cables, to reduce the amount of electromagnetic energy that is transmitted from the equipment. This is critical for ensuring that electronic systems do not interfere with other systems or equipment and that they are protected from harmful electromagnetic fields.
The steps involved in CISPR 22 shielding effectiveness testing typically include preparing the test equipment, the electronic enclosure, and the test environment, and conducting the radiated emissions and radiated susceptibility tests. The radiated emissions test measures the amount of electromagnetic energy that is transmitted from the electronic equipment, while the radiated susceptibility test measures the ability of the equipment to withstand external electromagnetic interference.
CISPR 22 provides limits for the radiated and conducted emissions and immunity, which are designed to ensure that electronic equipment does not interfere with other electronic systems and that it is protected from harmful electromagnetic fields. The limits are specified in terms of field strength or power density, and are defined for different frequency ranges.
In conclusion, CISPR 22 shielding effectiveness testing is an important aspect of electromagnetic compatibility testing, as it is used to evaluate the ability of electronic equipment to withstand and reduce the effects of electromagnetic interference. The results of the testing provide important information that can be used to design and improve the shielding effectiveness of electronic systems, ensuring their reliability and functionality in the presence of electromagnetic interference. CISPR 22 is widely recognized and used internationally, and it is a key reference for EMC testing and measurement in the information technology industry.
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