EN 55032 / CISPR 32 Class B RE Limits
Radiated Emissions Requirements for Class B Equipment
This table details the Radiated Emission (RE) limit requirements for Class B equipment according to EN 55032 / CISPR 32, covering measurements up to 1 GHz and above 1 GHz for OATS/SAC, FAR, and FSOATS facilities. Essential reference for commercial and residential EMC compliance.
Test Setup & Technical Overview
Detailed engineering guide for Multimedia Equipment Radiated Emissions (Class B)
Technical Overview: Protection of Wireless Services
EN 55032 (harmonized from CISPR 32) regulates the electromagnetic compatibility of Multimedia Equipment (MME).
Radiated Emission (RE) limits are established to prevent electromagnetic interference from disrupting nearby radio, television, and wireless communication services in residential, commercial, and industrial environments. Restricting these emissions is crucial for maintaining the integrity and reliability of critical spectrum services.
Test Configuration: Antenna Height Scan & Distance
RE testing under EN 55032 is conducted on an Open Area Test Site (OATS) or a Semi-Anechoic Chamber (SAC). The Equipment Under Test (EUT) is set up on a non-metallic turntable at a height of 0.8 m for table-top equipment or 1.5 m for floor-standing equipment.
During the scan, the turntable rotates 360 degrees, and the receiving antenna is continuously scanned in height from 1-4 m. Measurements are taken at a distance of 3 m or 10 m to locate the absolute maximum field strength.
Interpretation of Limits: Class A vs. Class B
EN 55032 classifies equipment into Class A (industrial, professional, or commercial environments) and Class B (residential environments).
Class B limits are approximately 10 dB stricter than Class A limits because devices in residential environments are physically closer to radio and TV receivers. This stricter limit ensures that multimedia equipment will not cause unacceptable radio interference to residential neighbors.