How to classify spurious emission and unwanted emission limits in Vietnam?

Pursuant to Section 2, Appdendix 2 of the Circular 08/2021/TT-BTTTT stipulating classification of spurious emission and unwanted emission limits in Vietnam as follows:

2.1. Spurious emission limit 1: comply with spurious emission limits of transmitters specified in QCVN 55:2011/BTTTT ^{(Note 2)}.

2.2. Unwanted emission limit 2: (comply with unwanted emission limits of transmitters specified in ETSI EN 302 608 V2.1.1 (2017-11) ^{(Note 3)}):

Frequency (f)	Limits (measured at 10 m distance)
9 kHz ≤ f < 150 kHz	44 dBμA/m at the 9 kHz frequency and decrease logarithmically in frequency to 19 dBμA/m at the 150 kHz frequency.
150 kHz ≤ f < 30 MHz	54 dBμA/m at the 150 kHz frequency and decrease logarithmically in frequency to 4 dBμA/m at the 30 MHz frequency.
30 MHz ≤ f < 1 GHz	79 dBμV/m at the 30 MHz frequency and decrease logarithmically in frequency to 54 dBμV/m at the 1 GHz frequency.

2.3. Spurious emission limit 3: comply with spurious emission limits of transmitters specified in QCVN 73:2013/BTTTT ^{(Note 2)}.

This spurious emission limit shall also apply to LPWAN specified in Clause 2 Article 5 of this Circular.

2.4. Spurious emission limit 4: comply with spurious emission limits of transmitters specified in QCVN 23:2011/BTTTT for angle-modulation devices and in QCVN 25:2011/BTTTT for AM/SSB or AM/DSB devices ^{(Note 2)}.

2.5. Spurious emission limit 5: comply with spurious emission limits of low-power radio transmitters specified in QCVN 47:2015/BTTTT ^{(Note 2)}.

2.6. Spurious emission limit 6: comply with spurious emission limits of transmitters specified in QCVN 91:2015/BTTTT ^{(Note 2)}.

2.7. Spurious emission limit 7: comply with spurious emission limits of transmitters specified in QCVN 42:2011/BTTTT ^{(Note 2)}.

2.8. Spurious emission limit 8 (comply with spurious emission limits of transmitters specified in Recommendation ITU-R. SM 329-12 ^{(Note 3)}):

Frequency (f)	Limit
47 MHz ≤ f ≤ 74 MHz; 87,5 MHz ≤ f ≤ 118 MHz; 174 MHz ≤ f ≤ 230 MHz; 470 MHz ≤ f ≤ 862 MHz	-54 dBm (4nW)
At other frequencies below 1000 MHz	-36 dBm (250nW)
At other frequencies above 1000 MHz	-30 dBm (1µW)

This spurious emission limit shall also apply to Radio Frequency Identification specified in Clause 1 Article 5 of this Circular.

2.9. Spurious emission limit 9: comply with spurious emission limits of transmitters specified in QCVN 122:2020/BTTTT ^{(Note 2)}. In case a LPWAN device is located at the same place with the base station in the 880-915 MHz frequency band, the limit on spurious emission from the LPWAN device shall not exceed -98 dBm/100 kHz or be within the frequency range from -98 dBm/100 kHz to -36 dBm/100 kHz if an agreement has been made between the entity operating the LPWAN device and the entity operating the base station in the 880-915 MHz frequency band.

This spurious emission limit shall also apply to LPWAN specified in Clause 2 Article 5 of this Circular.

2.10. Spurious emission limit 10: (comply with spurious emission limits of transmitters specified in Standard ETSI EN 301 406 v2.2.2 ^{(Note 3)} ):

Frequency (f)	Limit
47 MHz ≤ f ≤ 74 MHz; 87,5 MHz ≤ f ≤ 118 MHz; 174 MHz ≤ f ≤ 230 MHz; 470 MHz ≤ f ≤ 862 MHz	-54 dBm (4nW)
At other frequencies below 1000 MHz	-36 dBm (250nW)
At other frequencies above 1000 MHz	-30 dBm (1µW)

2.11. Spurious emission limit 11: comply with spurious emission limits of transmitters specified in QCVN 54:2020/BTTTT ^{(Note 2)}.

2.12. Spurious emission limit 12: comply with spurious emission limits of transmitters specified in QCVN 92:2015/BTTTT ^{(Note 2)}.

2.13. Spurious emission limit 13: comply with spurious emission limits of transmitters specified in QCVN 74:2020/BTTTT ^{(Note 2)}.

2.14. Spurious emission limit 14: comply with spurious emission limits of transmitters specified in QCVN 65:2013/BTTTT ^{(Note 2)}.

2.15. Spurious emission limit 15: (comply with unwanted emission limits of transmitters specified in Standard ETSI EN 302 372 v2.1.1 ^{(Note 3)}):

Frequency (f)	Limits (measured outside the wall of tank and within prescribed frequency band)	Limits (measured outside the wall of tank and outside the prescribed frequency band)
f < 1 GHz	- 51,3 dBm/MHz	- 61,3 dBm/MHz
f ≥ 1 GHz	- 41,3 dBm/MHz	- 51,3 dBm/MHz - 60 dBm/MHz (applicable to 10,6 - 10,7 GHz frequency band)

2.16. Spurious emission limit 16: (comply with unwanted emission limits of transmitters specified in Standard ETSI EN 302 858 v2.1.1 ^{(Note 3)}):

Frequency (f)	Limits
47 MHz ≤ f ≤ 74 MHz; 87,5 MHz ≤ f ≤ 118 MHz; 174 MHz ≤ f ≤ 230 MHz; 470 MHz ≤ f ≤ 790 MHz	-54 dBm (4nW)
At other frequencies from 30 MHz to 1000 MHz	-36 dBm (250nW)
At other frequencies above 1000 MHz to 50 000 MHz	-30 dBm (1µW)

2.17. Spurious emission limit 17: comply with spurious emission limits of transmitters specified in QCVN 88:2015/BTTTT ^{(Note 2)}.

2.18. Spurious emission limit 18: (comply with unwanted emission limits of transmitters specified in Standard EN 301 091-1 v2.1.1 ^{(Note 3)}):

Frequency (f)	Limits
47 MHz ≤ f ≤ 74 MHz; 87,5 MHz ≤ f ≤ 118 MHz; 174 MHz ≤ f ≤ 230 MHz; 470 MHz ≤ f ≤ 862 MHz	-54 dBm
At other frequencies from 30 MHz to 1000 MHz	-36 dBm
1000 MHz < f ≤ 300 000 GHz	-30 dBm

2.19. Spurious emission limit 19: (comply with unwanted emission limits of transmitters specified in Standard ETSI EN 302 264 v2.1.1 ^{(Note 3)}):

Frequency (f)	Limits
47 MHz ≤ f ≤ 74 MHz; 87,5 MHz ≤ f ≤ 118 MHz; 174 MHz ≤ f ≤ 230 MHz; 470 MHz ≤ f ≤ 862 MHz	-54 dBm
At other frequencies from 30 MHz to 1000 MHz	-36 dBm
1000 MHz < f ≤ 300 000 GHz	-30 dBm

2.20. Spurious emission limit 20: (comply with spurious emission limits of transmitters specified in Standard ETSI EN 305 550-2 v1.2.1 ^{(Note 3)}):

Frequency (f)	Limits
47 MHz ≤ f ≤ 74 MHz; 87,5 MHz ≤ f ≤ 118 MHz; 174 MHz ≤ f ≤ 230 MHz; 470 MHz ≤ f ≤ 862 MHz	-54 dBm
At other frequencies from 30 MHz to 1000 MHz	-36 dBm
1000 MHz < f ≤ 300 000 GHz	-30 dBm

2.21. Spurious emission limit 21: comply with spurious emission limits of transmitters specified in QCVN 68:2013/BTTTT ^{(Note 2)}.

2.22. Spurious emission limit 22: comply with spurious emission limits of transmitters specified in QCVN 107:2016/BTTTT ^{(Note 2)}.

2.23. Spurious emission limit 23: comply with spurious emission limits of transmitters specified in QCVN 57:2011/BTTTT ^{(Note 2)}.

2.24. Spurious emission limit 24: (comply with spurious emission limits of transmitters specified in Standard ETSI EN 302 065-1 v2.1.1 ^{(Note 3)}):

Frequency (f)	Limits
47 MHz ≤ f ≤ 74 MHz; 87,5 MHz ≤ f ≤ 118 MHz; 174 MHz ≤ f ≤ 230 MHz; 470 MHz ≤ f ≤ 862 MHz	-54 dBm
At other frequencies from 30 MHz to 1000 MHz	-36 dBm
1000 MHz < f ≤ 40 000 GHz	-30 dBm

Note 2: In case corresponding national technical regulations are amended or superseded after this Circular comes into force, the spurious or unwanted emission limits specified in the new ones shall apply.

Note 3: In case the Ministry of Information and Communications promulgates national technical regulations on corresponding radio devices specified in Column B Section 1 of Appendix 2 enclosed herewith after this Circular comes into force, the spurious or unwanted emission limits specified in such national technical regulations shall apply.

Best regards!