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CLC/TR 50485:2010

Current
Current

The latest, up-to-date edition.

Electromagnetic compatibility - Emission measurements in fully anechoic chambers
Published date

03-12-2010

1 Scope
2 References
3 Definitions and abbreviations
4 Test and measurement equipment
5 Anechoic room performance
6 Emission measurement
7 Test procedure
8 Test plan
9 Test report
Annex A (informative) - Determining the Site Reference
Annex B (informative) - Limit values
Annex C (informative) - Comparison of measurement uncertainties
        for 3 m OATS and 3 m FAR
Annex D (informative) - Derivation of free space NSA formula
Annex E (informative) - Corrections of field strength for test
        distance
Annex F (informative) - NSA measurements with biconical antennas
Annex G (informative) - Measurement of Balun imbalance
Annex H (informative) - FAR project
Bibliography

This Technical Report applies to emission measurements of radiated electromagnetic fields in Fully Anechoic Rooms (FAR) in the frequency range from 30 MHz to 18 GHz. This Technical Report covers the frequency range from 30 MHz – 1 000 MHz. The frequency range above 1 GHz is under consideration, due to the absence of practical experience. This Technical Report describes the validation procedure for the Fully Anechoic Room for radiated emission tests and the procedures to carry out the tests (e.g. test set up, EUT position, cable layout and termination, test procedures). Recommendations for the relation between FAR emission limits and common Open Area Test Site (OATS) emission limits given in standards such as EN 55011 and EN 55022 are given in Annex B. This FAR emission method may be chosen by product committees as an alternative method to emission measurement on an Open Area Test Site (OATS) as described in CISPR 16 series. In such cases, the product committee should also define the appropriate limits. Typical measurement uncertainty values for FARs and OATS are given in Annex C.

Committee
CLC/TC 210
DevelopmentNote
Supersedes R210-010. (04/2010)
DocumentType
Technical Report
PublisherName
European Committee for Standards - Electrical
Status
Current
Supersedes

Standards Relationship
PD CLC/TR 50485:2010 Identical
CEI CLC/TR 50485 : 2013 Identical
NEN NPR CLC/TR 50485 : 2010 Identical
S.R. CLC/TR 50485:2010 Identical

ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
CLC/TR 50484:2009 Recommendations for shielded enclosures
EN 50147-1:1996 Anechoic chambers - Part 1: Shield attenuation measurement
CISPR 22:2008 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement
EN 55022:2010/AC:2011 INFORMATION TECHNOLOGY EQUIPMENT - RADIO DISTURBANCE CHARACTERISTICS - LIMITS AND METHODS OF MEASUREMENT (CISPR 22:2008)
CISPR 16-2:2003 Specification for radio disturbance and immunity measuring apparatus and methods - Part 2: Methods of measurement of disturbances and immunity
ANSI C63.5 : 2006 ELECTROMAGNETIC COMPATIBILITY - RADIATED EMISSION MEASUREMENTS IN ELECTROMAGNETIC INTERFERENCE (EMI) CONTROL - CALIBRATION AND QUALIFICATION OF ANTENNAS (9 KHZ TO 40 GHZ)
CISPR 11:2015 RLV Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement
CISPR 16-1:1999+AMD1:2002 CSV Specification for radio disturbance and immunity measuring apparatus and methods - Part 1: Radio disturbance and immunity measuring apparatus

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