CISPR 22:1993/AMD2:1996

Overview

CISPR 22:1993/AMD2:1996 is an important amendment to the international standard established by the International Electrotechnical Commission (IEC). This amendment focuses on the limits and methods of measurement of radio disturbance characteristics specifically for information technology equipment (ITE). It is crucial for ensuring electromagnetic compatibility (EMC) by defining how radio frequency disturbances emitted by ITE are measured and controlled. This standard helps manufacturers and testing laboratories worldwide maintain compliance with regulatory requirements related to radio noise emissions.

Key Topics

• Radio Disturbance Limits: This amendment updates the permissible limits of radio frequency emissions to reduce interference with other electronic devices and communication systems.
• Measurement Methods: It details standardized methods and procedures for measuring disturbances emitted by various types of information technology equipment.
• Electromagnetic Compatibility (EMC): Emphasizes the importance of minimizing electromagnetic interference (EMI) for the proper operation of ITE within electromagnetic environments.
• Testing Environments: Defines conditions such as test site requirements, instrumentation, and setup to ensure consistent and reliable measurement results.
• Scope of Equipment: Applies broadly to computer systems, data processing equipment, and related peripherals, ensuring that all types of modern ITE conform to the specified disturbance limits.

Applications

CISPR 22:1993/AMD2:1996 is widely used in:

• Product Development: Manufacturers use this amendment to design and test equipment that meets international EMC standards, avoiding costly redesigns and market restrictions.
• Conformity Testing: Testing laboratories rely on the prescribed measurement methods for certifying that ITE complies with regulatory standards related to radio disturbance.
• Regulatory Compliance: Regulatory bodies incorporate these limits and measurement methods to enforce EMC requirements and approve products for sale in various markets.
• Quality Assurance: Ensures that products maintain a low level of radio interference, improving the reliability and user experience of electronic devices.
• Global Market Access: Compliance facilitates acceptance of ITE in multiple countries, reducing barriers to international trade.

Related Standards

Understanding CISPR 22:1993/AMD2:1996 is enhanced by considering its relationship with other EMC standards:

• CISPR 22 (Base Standard): The original standard defining limits for ITE emissions; Amendment 2 updates key measurement methods and limits.
• IEC 61000 Series: Covers broader EMC requirements for electrical equipment including immunity and emission testing.
• CISPR 24: Defines immunity requirements for information technology equipment, complementing CISPR 22’s focus on emission limits.
• FCC Part 15: U.S. regulations on radio frequency emissions from digital devices, complementary to CISPR standards for global market regulation.

This amendment plays a vital role in ensuring electromagnetic compatibility and minimizing disruptive radio disturbances from information technology equipment worldwide. Compliance with CISPR 22:1993/AMD2:1996 supports safer, more reliable electronic products, helping manufacturers and regulators maintain high-performance standards in increasingly complex electromagnetic environments.