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EMC

EN 55032 / CISPR 32 Class B RE Limits

Radiated Emissions Requirements for Class B Equipment (Identical to legacy EN 55022 / CISPR 22 limits)

This table details the Radiated Emission (RE) limit requirements for Class B equipment according to EN 55032 / CISPR 32 and legacy EN 55022 / CISPR 22 standards, covering measurements up to 1 GHz and above 1 GHz for OATS/SAC, FAR, and FSOATS facilities. The limits are identical between the standards.

Limit Visualization Curve
Class B Equipment Limits
Levels in dB(µV/m). Scroll horizontally to view more.
Clause Frequency (MHz) Facility Distance (m) Detector / Bandwidth Limits
Up to 1 GHz
A4.1 30 to 230 OATS/SAC 10 Quasi Peak / 120 kHz 30
230 to 1 000 OATS/SAC 10 Quasi Peak / 120 kHz 37
A4.2 30 to 230 OATS/SAC 3 Quasi Peak / 120 kHz 40
230 to 1 000 OATS/SAC 3 Quasi Peak / 120 kHz 47
A4.3 30 to 230 FAR 10 Quasi Peak / 120 kHz 32 to 25
230 to 1 000 FAR 10 Quasi Peak / 120 kHz 32
A4.4 30 to 230 FAR 3 Quasi Peak / 120 kHz 42 to 35
230 to 1 000 FAR 3 Quasi Peak / 120 kHz 42
Above 1 GHz
A5.1 1 000 to 3 000 FSOATS 3 Average / 1 MHz 50
3 000 to 6 000 FSOATS 3 Average / 1 MHz 54
A5.2 1 000 to 3 000 FSOATS 3 Peak / 1 MHz 70
3 000 to 6 000 FSOATS 3 Peak / 1 MHz 74

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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). Today, EN 55032 / CISPR 32 has officially replaced the legacy Information Technology Equipment (ITE) standards EN 55022 and CISPR 22. Because the Class B radiated emission limits are identical between the old and new standards, the limits presented here apply equally to assessments under EN 55022 / CISPR 22.

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. If you need to extrapolate limits between 3m and 10m, you can use our Distance Extrapolation Calculator.

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.

How to read the EN 55032 Class B radiated-emission reference

User task

Use this Class B page to evaluate the radiated field-strength rows intended to protect residential radio reception. It separates the Class B environment from Class A and keeps the actual facility, distance and receiver settings visible.

Choose before comparing

Choose the Class B row together with its facility and measurement distance. The reference spans 30 MHz–6 GHz in dBµV/m; quasi-peak / 120 kHz below 1 GHz and average or peak / 1 MHz above 1 GHz are not interchangeable receiver conditions.

What the displayed rows mean

Frequency and receiver split
30 MHz–6 GHz is separated at 1 GHz so the detector and RBW context remain explicit.
Residential geometry
OATS, SAC, FAR and FSOATS entries identify 3 m or 10 m geometry; a Class B margin must retain that distance and facility.
Class boundary
Class B is the residential-oriented class. A Class A result or commercial test arrangement does not answer this Class B comparison.

Common misread

Class B is not obtained by taking a Class A result and applying a generic offset. Keep the frequency band, detector, RBW, facility and distance together, and treat the page as an engineering reference only.

Reference boundary

EMCCalc uses the public IEC Webstore record to explain the displayed Class B rows. Formal EMC evaluation requires the applicable adopted standard, site validation and complete measurement procedure.

Content review date:

Source and verification

Primary source

IEC Webstore — CISPR 32:2015+AMD1:2019 CSV Class B radiated-emission requirements; table identifiers are retained in the lookup

Applicability
Multimedia equipment in the applicable Class B environment; select the facility and test distance represented by the table row.
Read this limit with
  • 30 MHz–6 GHz
  • OATS/SAC, FAR, or FSOATS as shown
  • 3 m or 10 m as shown
  • Quasi-peak / 120 kHz below 1 GHz; average and peak / 1 MHz above 1 GHz
  • dBµV/m
Last source-link and context review
Verification method
The source link, edition/section locator, and measurement context were reviewed against the values shown here. This reference is not a formal conformity assessment or certification.

Engineering reading

Choose the correct equipment class, port, detector, frequency range, facility, and distance before comparing a measurement to a limit.