PD CLC/TR 50485:2010 Electromagnetic compatibility. Emission measurements in fully anechoic chambers
PD CLC/TR 50485 is a Technical Report which applies to emission measurements of radiated electromagnetic fields in Fully Anechoic Rooms (FAR) in the frequency range from 30 MHz to 18 GHz. PD CLC/TR 50485 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.
PD CLC/TR 50485 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.
Contents of PD CLC/TR 50485:
1 Scope
2 References
3 Definitions and abbreviations
4 Test and measurement equipment
5 Anechoic room performance
6 Emission measurement
6.1 Test set up
6.2 EUT position
6.3 Cable layout and termination
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
CLC/TR 50485:2010