What are standards and limits of radiation emission methods in Vietnam?

18:31, 11/07/2024

On May 25, 2018, the Ministry of Information and Communications of Vietnam promulgated Circular 08/2018/TT-BTTTT on the National Technical Regulation on Electromagnetic Compatibility for Multimedia Equipment - Emission Requirements.

According to the regulations in the National Technical Standards issued with Circular 08, the radiation emission methods in Vietnam must meet the following standards and limits:

Clause	Measurement Equipment	Verification Method	Measurement		Limits and Explanations
Clause	Measurement Equipment	Verification Method	Procedure	Arrangement	Limits and Explanations
1.1	SAC or OATS with weather protection roof	5.3 of CISPR 16:1-4:2010/AMD1:2012	7.3 of CISPR 16:2-3:2010	Appendix C	- The maximum width of the EUT, internal AE, and combined cables must lie within the measurement volume in the NSA attenuation measurement as demonstrated in the attenuation measurement position verification process. - The confirmed measurement volume does not need to include any internal AE and combined cables placed under the RGP or turntable, or at a distant location, as described in C.1. - The values used for NSA measurement at a 5 m distance are presented in Table B.3.
1.2	OATS without weather protection roof	5.2 of CISPR 16:1-4:2010/AMD1:2012	7.3 of CISPR 16:2-3:2010	Appendix C	- The values used for NSA measurement at a 5 m distance are presented in Table B.3.
1.3	FSOATS	8.3 of CISPR 16:1-4:2010/AMD1:2012	7.6.6 of CISPR 16:2-3:2010	Appendix C	- The measurement equipment certified as per the FSOATS requirements must be used for measurements above 1 GHz. - EUT, internal AE, and combined cables must lie within the measurement volume as described in the measurement position verification process. - FSOATS can be an SAC/OATS with RF absorber on RGP or a FAR.
1.4	FAR	5.4.7 of CISPR 16:1-4:2010/AMD1:2012	Appendix B and 7.4 of CISPR 16:2-3:2010	Appendix C	- This clause applies to radiation emission measurements up to 1 GHz for EUT arrangements on the table as in Figures C.11 and C.12. - When using the same room for measurements above 1 GHz, the clause in Table 3 applies, using the room as an FSOATS. - The height and maximum width of the EUT, internal AE including cables to AE must be less than half the measurement distance as verified in the measurement position verification process. - Where applicable, the height of the EUT includes 0.8 m of vertically exposed cable. - Where applicable, the width of the EUT includes 0.8 m of horizontally exposed cable.

See more Circular 08/2018/TT-BTTTT effective from July 01, 2019.

- Thanh Lam -

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