EXTENDMAX - The Vietnam Ministry of Information and Communications has issued Circular 08/2021/TT-BTTTT signed on October 14, 2021 stipulating the list of radio equipment exempt from radio frequency license, technical and operational conditions. This Circular has many new points with an open mind in comparision to the old version, Circular 18/2018/TT-BTTTT. Previously, organizations and individuals were only allowed to import products that pre-fixed default software to meet technical and operational conditions which are mostly in operating frequency range and transmit power (according to Clause 3, Article 4 of Circular No. 46/2016/TT-BTTTT). This requirement has caused confusion for enterprises when importing international version products which has frequency range and transmit power range larger than permitted value in Circular No. 46/2016/TT-BTTTT (amended and supplemented by Circular No. 18/2018/TT-BTTTT). While many organization can adjust the product to meet the specified frequency bands transmit power levels before use, the products which has frequency range and transmit power range larger than permitted value is still not "allowed for import". According to the new view in Circular 08/2021/TT-BTTTT, the content related to import has been eliminated, products that meet the technical and operational conditions will be allowed to be used (and certified for conformity). This means that enterprises can import international version products which has frequency range and transmit power range larger than permitted value in Circular No. 08/2021/TT-BTTTT first, and then use technical solutions to adjust the products to the pre-specified level before testing, certifying conformity, and using. Along with that, enterprises are fully responsible before the law for the use of products that must conform to the technical and oprational conditions specified in the Circular No. 08/2021/TT-BTTTT.
Highlight on new changes of Circular 08/2021/TT-BTTTT:
1. Now the products which does not meet the Circular No. 08/2021/TT-BTTT can be imported first, then be adjusted to satisfy the requirements before applying for in-country test, type approval, or use
2. Remove definition of “Wide band communication devices” and its corresponding appendix (Appendix 13 at former circular)
3. Radio Locan Area Network - RLAN equipment has been added to group of "Wireless Local Area Network" equipment
4. Low-Power Wide Area Network - LPWAN equipment has been added together with its corresponding Appendix.
5. New appendix for wireless power transfer devices, hearing aids has been moved to inductive loop device section
6. 2400MHz ~ 2483.5MHz and 5725MHz ~ 5850MHz ISM bands can be used for remote control devices
7. MIC allocates several additional bands for short range radar used inside storage tank.
8. MIC allocates one more range for UWB device which is 7238.4 ~ 9000MHz (beside 4000 ~ 4800 Mhz band at this moment)
The new MIC Circular No. 08/2021/TT-BTTTT shall enter inforce from November 28, 2021 and replace Circular 46/2016/TT-BTTTT and Circular 18/2018/TT-BTTTT.
In general, Circular No. 08/2021/TT-BTTTT is built on an open mind. However, there are a number of products for search and rescue purpose listed in Appendix 20 "must not be used for other purposes not yet permitted by law". This point can be confusing in implementation and can be better improved by the point of view "enterprises are allowed to use for purposes not prohibited by law".
Unfortunately, WiFi 6E (6GHz) is not allowed yet.
Download original version from MIC website: download link
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Ministry of Information and Communications |
SOCIALIST REPUBLIC OF VIETNAM |
|
No: 08/2021/TT-BTTTT |
Hanoi, October 14, 2021 |
CIRCULAR
LIST OF LICENSE-EXEMPT RADIO DEVICES AND ACCOMPANYING TECHNICAL AND OPERATIONAL CONDITIONS
Pursuant to the Law on radio frequency dated November 23, 2009;
Pursuant to Decree No 17/2017/ND-CP 2013 of Government defining the functions, tasks, powers and organizational structure of Ministry of Information and Communications;
Pursuant to Decision No. 71/2013/QD-TTg dated November 21, 2013 by the Prime Minister promulgating the Plan for national radio spectrum;
Upon the request of Director of the Authority of Radio Frequency Management,
Minister of Information and Communications promulgates the list of license-exempt radio devices and accompanying technical and operational conditions.
Article 1. Scope and regulated entities
1. This Circular promulgates the list of license-exempt radio devices and technical and operational conditions pertaining thereto.
2. This Circular applies to organizational or individual entities that manage, use, produce, import or trade radio devices in Vietnam which is promulgated by Clause 1 of this Circular.
3. This Circular does not apply to radio devices which are produced or imported to serve national defense and security duties of armed forces. The manufacturing, import and use of the said radio devices shall be governed by regulations promulgated by Ministry of National Defense or Ministry of Public Security in conformity with corresponding national technical regulations.
Article 2. Interpretation of terms
In this document, these terms shall be construed as follows:
1. Short Range Device refers to the radio transmitter or the radio transceiver which have low capability of causing harmful interference to other radio equipment when it meets certain technical and operational conditions.
2. Non-Specific Short Range Devices refer to Short Range Devices which meet all of prescribed technical and operational conditions regardless of their applications or uses.
3. Cordless Phone refers to the terminal telephonic device which is connected to the two-wire analogue subscriber interface. This device consists of base unit and mobile unit which are connected to each other by means of radio interface:
The base unit (also called as the base station) is located at a fixed place and connected with two fixed telephone lines of the Public Switched Telephone Network (PSTN) by using integrated antenna. Integrated antenna has fixed design and is set inside or outside the base unit as a part of the base unit.
The mobile unit (a cordless phone may include several mobile units, also called portable stations) is a handset using integrated antenna. The mobile unit shall have the same subscriber number with the base unit.
4. Medical Implant Communications Systems (MICS) and Medical Implant Telemetry Systems (MITS)
Medical Implant Communications Systems (hereinafter referred to as “MICS”) and Medical Implant Telemetry Systems (hereinafter referred to as “MITS”) refer to systems which consist of an implantable medical device placed in the human body and a radio communication device outside the body to communicate data with the implantable device in a distance around 02 meters; received data shall be transmitted to the data processing center and doctors by means of telecommunication network.
MICS provides two-way communications between an implantable device and a radio communication device. MITS provides one-way communications from an implantable device to a radio communication device at a pre-programmed time.
5. Radio Frequency Identification (RFID)
RFID uses radio waves to automatically identify and track goods, people or animals and have other applications. The RFID system includes two main different components which are connected to each other by means of radio interface:
- The radio-frequency tag (RF tag) has an electronic chip with or without power source and is attached to the object to be identified. Information about the identified object shall be stored on the electronic chip.
- The radio-frequency reader (RF Reader) generates radio signal at a determined frequency to activate the RF tag and read its response. The RF reader shall receive and transmit response from the RF tag to the data processing system.
RFID is used in the fields of distribution, transportation and retailing, health care services, traffic or mobile applications.
6. Radio Detection and Alarm Device
Radio Detection and Alarm Device consists of sensor and control system which are connected to each other by means of radio interface.
Anti-theft device, motion detector and metal detector are certain types of Radio Detection and Alarm Devices.
7. Wireless Audio Device
Wireless Audio Devices refer to devices that use radio waves to transmit sound in a short distance. Typical wireless audio devices: Wireless lavaliere microphone, wireless handset microphone, wireless earphones, personal FM transmitter and hearing aids.
Wireless Audio Devices defined within this Circular does not include Wireless Audio Devices operating in 470 – 694 MHz, having RF output power over 30mW used in sound and television broadcasting.
8. Remote Control Device
Remote Control Devices use radio waves to control models and have other control applications in industrial and civil sectors.
Typical types of remote-control devices: remote control devices for models in the air such as model airplanes, remote control devices for models on land or water surface such model cars and model ships, remote control devices in industrial and civil sectors such as remote car door openers and remote garage door openers.
9. Wireless Local Area Network equipment
Wireless Local Area Network Device is used to set up the radio local area network or enable users to connect all devices wirelessly instead of using internet cable.
Typical types of WLAN/RLAN devices: access point, wifi router, wifi card, integrated radio receiver-transmitter modules according to IEEE 802.11 and IEE 802.15.4 specifications (excluding Wireless bridges); WLAN/RLAN using LTE technology (Long Term Evolution)
10. Telemetry Device
Telemetry Device automatically displays or records measurements and controls functions of other devices by means of radio interface. Telemetry Device defined by this Circular shall include the short-range radar using to measure liquid level in storage tank or on field for manufacturing or industry applications.
11. Wireless Video Transmitter
Wireless Video Transmitter is used to send image data (or image and sounds data) to the processing system by means of radio interface.
Typical types of Wireless Video Transmitters: wireless webcam, wireless camera and wireless video transmitters through computer USB port.
12. Radio devices placed on fishing vessels
Radio devices placed on fishing vessels are used for communications between fishing vessels operating in the territorial waters of Vietnam.
13. Receive-only radio device refers to a radio device that has the function to receive radio wave signals only.
14. Radar used in traffic communication application (Automotive Radar, Radar Sensor, or Road Transport and Traffic Telematics) is short-range radar that is used in traffic communication application (roadway or railway) applications such as cruise control, detection, warning, and avoidance of collisions between vehicles and surrounding objects.
15. Low-power walkie-talkies are portable radio terminal devices functioned to receive and transmit speech within a limited area (E.g. building, restaurant, hotel).
16. Ultra Wide Band (UWB) Communication Device is a short-range radio device that is used to transmit data or radio wave energy at ultra-wide bandwidth (-10 dB bandwidth of main emission, denoted B-10, min. 500 MHz, or -10 dB fractional bandwidth of main emission, denoted U-10, 0.2 or more). In which bandwidth B-10 and U-10 are determined as follows:
B-10 = fH - fL (fH, fL are the upper and lower bounds respectively. At these frequencies, the power spectral density of the UWB emission is 10 dB lower than the fM frequency of the large emission. Best);
U-10 = B-10/fc (fc is the center frequency of the -10 dB bandwidth and equals (fH + fL)/2).
17. Inductive Loop device is functioned to transmit signals, operates according to electromagnetic field principle, and uses low frequency.
18. Automatic Identification System (AIS) refers to radio device used in maritime safety systems on vessels/ships and other motor or none-motor vehicles with the aim of avoiding collisions and managing surface or underwater vehicles.
19. Emergency Position Indicating Radio Beacon (EPIRB) refers to radio device that is used to locate emergency cases in the 406-406.1 MHz frequency band and placed on surface or underwater vehicles such as vessels/ships and other motor or none-motor vehicles.
20. Search and Rescue Radar Transponder (SART) refers to radio device intended for marine search and rescue operations in the 9 GHz frequency band.
21. AIS Search and Rescue Transmitter (AIS-SART) refers to radio device in the group of marine supporting devices used to support operations of search and rescue agencies in locating survival equipment or distressed vessels.
22. ELT-Emergency Locator Transmitter is a device for transmitting emergency position signals using radio waves on the frequency of 406 MHz for use on aircraft.
23. PLB-Personal Locator Beacon is a device that transmits location signals using radio waves on a frequency of 406 MHz exclusively for vehicles and people operating on land.
24. LPWAN-Low Power Wide Area Network including sensors and transceivers to transceive data from the sensors which are interconnected via a radio interface, using a spectrum shared with other short-range radio equipment. LPWAN equipment specified in this Circular does not include LPWAN equipment using licensed frequency bands according to radio frequency spectrum allocation (for example, LPWAN equipment using NB-IoT, LTE-M…).
25. WPT-Wireless Power Transfer is a radio device that transmits electrical energy and signals from the power supply to the device to be charged according to the principle of electromagnetic induction.
26. ERP: Effective radiated power.
27. EIRP: Equivalent isotropic radiated power.
28. ERPEP: Effective Radiated Peak Envelope Power.
Article 3. List of license-exempt radio equipment and accompanying technical and operational conditions
1. The list of license-exempt radio equipment (hereinafter referred to as the “List”) is provided in Appendix 1 enclosed herewith.
2. Technical and operational conditions applied to license-exempt radio devices are provided for in Appendix 2 ~ Appendix 20 enclosed herewith.
Article 4. Condition to be exempt from radio frequency licensing
Radio equipment is exempt from radio frequency licensing when it fully meets the below conditions:
a) Listed on Appendix 1 issued together with this Circular
b) Meet the general conditions for use provided at Article 6 of this Circular
c) Meet the corresponding technical and operational conditions provided at Appendix 2 to Appendix 20 issued together with this Circular
Article 5. Regulations on the radio equipment listed on Appendix 1 issued together with this Circular but does not meet technical and operational conditions.
Radio equipment on the list specified in Appendix 1 issued together with this Circular but failing to satisfy the corresponding technical and operational conditions specified in Appendix 2 to 20 issued with this Circular. This equipment shall not be allowed to use in Vietnam, except for the following cases where it is can be used after obtaining a license to use radio frequencies and equipment:
1. Radio frequency identification device operating in the band 920-923 MHz for non-stop electronic toll collection with a transmit power of over 500 mW ERP up to 2000 mW ERP.
2. Low-power wide-area network radio equipment operating in the band 433.05-434.79 MHz with a transmit power of over 25 mW ERP up to 100 mW ERP and operating in the 920-923 MHz band with transmit power of over 25 mW ERP up to 306 mW ERP.
3. Radio equipment installed on fishing vessels operating in bands other than 26.96-27.41 MHz as prescribed in the radio frequency planning.
4. Radio terminal equipment used for the purpose of assisting safety and rescue using frequencies as prescribed by international organizations of which Vietnam is a member or in accordance with the planning and regulations on use of frequencies but not specified in this Circular.
Article 6. General requirement on using conditions
The following requirements are generally applied to license-exempt radio devices:
1. The license-exempt radio equipment used for emergency, safety, search and rescue purposes shall be protected from harmful interference as prescribed by law when used in frequency channels and bands specified in Appendix 20 issued together with this Circular. In other cases, the use of license-exempt radio equipment may be subject to harmful interference from licensed radio equipment and radio equipment permitted to be operated by the regulatory agency.
2. In case a license-exempt radio device causes harmful interference to other radio devices licensed to use radio frequency or radio devices licensed to operate by competent supervisory agencies, the organization or individual must suspend the use and shall be resumed only when interference problems are successfully remedied.
3. License-exempt radio devices must tolerate harmful interference caused by devices using radio frequency for industrial, scientific, and medical (ISM) purposes when they share the following ISM frequency bands:
a) Frequency band 13.553 ÷ 13.567 MHz;
b) Frequency band 26.957 ÷ 27.283 MHz;
c) Frequency band 40.66 ÷ 40.70 MHz;
d) Frequency band 2400 ÷ 2483.5 MHz;
dd) Frequency band 5725 ÷ 5875 MHz;
e) Frequency band 24000 ÷ 24250 MHz.
4. For short-range radio equipment that can operate at different levels of transmit power or in different frequency bands or with a wide operating frequency range, when used, manufactured, or imported for use in Vietnam organizations and individuals must be responsible for the fixed installation of parameters on frequency and power level as prescribed in this Circular.
5. For radio equipment exempt from the license to use radio frequencies with integrated radio remote control features in aircraft models, when used by organizations or individuals, organizations and individuals must comply with regulations on licensing of flight operations.
6. For radio equipment that is only exempt from the license to use radio frequencies when using it, organizations and individuals must comply with the provisions of the law on telecommunications, radio frequencies and regulations. of other relevant laws.
Article 7. Transitional clause
The radio equipment in use which meet the provisions of Circular No. 46/2016/TT-BTTTT dated December 26, 2016 of the Minister of Information and Communications, providing for the list of license-exempt radio equipment and accompanying technical and operating conditions, amended and supplemented with a number of Articles according to the Minister's Circular No. 18/2018/TT-BTTTT dated December 20, 2018 The Ministry of Information and Communications, but failing to satisfy the provisions of this Circular, may continue to be used it but must be stopped when the radio frequency management agency determines that it is a cause of harmful interference to licensed radio equipment or radio equipment permitted to operate by the regulatory agency.
Article 8. Implementation
1. This Circular shall take effect as from November 28, 2021 and supersede the following circulars:
a) Circular No. 46/2016/TT-BTTTT dated December 26, 2016 of the Minister of Information and Communications stipulating the list of radio equipment exempt from radio frequency license and accompanying technical and operational conditions.
b) Circular No. 18/2018/TT-BTTTT dated December 20, 2018 of the Minister of Information and Communications amending and supplementing a number of articles of Circular No. 46/2016/TT-BTTTT dated December 26 2016 of the Minister of Information and Communications stipulating the list of radio equipment exempt from radio frequency license and accompanying technical and operational conditions..
2. Chief of Office, Director of the Authority of Radio Frequency Management, heads of affiliates of Ministry of Information and Communications, and relevant organizations and individuals shall implement this Circular.
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THE MINISTER (Signed and stamp)
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APPENDIX 1
LIST OF LICENSE-EXEMPT RADIO DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 by the Minister of Information and Communications)
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No. |
Type of radio device |
Appendix to regulate conditions on frequency, technical and operational conditions |
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1 |
Group of Short Range Devices |
|
|
1.1 |
Non-Specific Short Range Device |
Appendix 2, Appendix 3 |
|
1.2 |
Cordless phone |
Appendix 2, Appendix 4 |
|
1.3 |
Medical Implant Communications Systems (MICS) and Medical Implant Telemetry Systems (MITS) |
Appendix 2, Appendix 5 |
|
1.4 |
Radio Frequency Identification Device (RFID) |
Appendix 2, Appendix 6 |
|
1.5 |
Radio Detection and Alarm Device |
Appendix 2, Appendix 7 |
|
1.6 |
Wireless Audio Device |
Appendix 2, Appendix 8 |
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1.7 |
Remote Control Device |
Appendix 2, Appendix 9 |
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1.8 |
Wireless Local Area Network Device (WLAN/RLAN) |
Appendix 2, Appendix 10 |
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1.9 |
Telemetry Device |
Appendix 2, Appendix 11 |
|
1.10 |
Wireless Video Transmitter |
Appendix 2, Appendix 12 |
|
1.11 |
Ultra Wide Band Communication Devices |
Appendix 2, Appendix 13 |
|
1.12 |
Short Range Device used in traffic applications |
Appendix 2, Appendix 14 |
|
1.13 |
Inductive Loop devices |
Appendix 2, Appendix 15 |
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1.14 |
Wireless Power Transfer device |
Appendix 2, Appendix 16 |
|
2 |
Radio devices placed on fishing vessels |
Appendix 2, Appendix 17 |
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3 |
Low-power walkie-talkies |
Appendix 2, Appendix 18 |
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4 |
Low Power Wide Area Network device (LPWAN) |
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5 |
Group of radio devices for marine safety and rescue purposes |
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5.1 |
Automatic Identification System (AIS) |
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5.2 |
Emergency Position Indicating Radio Beacon (EPIRB) |
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5.3 |
Search and Rescue Radar Transponder (SART) |
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5.4 |
AIS Search and Rescue Radar Transponder (AIS-SART) |
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5.5 |
Emergency Locator Transmitter (ELT) |
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5.6 |
Personal Locator Beacon (PLB) |
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6 |
Receive-only radio device (Note 1) |
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Note 1:
Receiver-only radio equipment on the list of license-exempt radio equipment is exempted from license to use radio frequencies. Organizations and individuals using receiver-only radio equipment must comply with the provisions of the law on telecommunications, radio frequencies and other relevant laws; The information obtained may not be used for illegal purposes.
If an organization or individual using the below-receiving radio equipment wishes to protect the equipment from harmful interference, they shall carry out the procedures for applying for a license to use radio frequencies in accordance with regulations of the Ministry of Information and Communications detailing and guiding procedures for granting licenses to use radio frequencies; leasing, lending radio equipment; sharing of radio frequencies:
a) The station receives foreign television signals directly from the satellite TVRO-Television Receive Only. Organizations and individuals exploiting and using TVRO receivers must comply with the provisions of the law on telecommunications, press, radio, and television.
b) EESS-Earth Exploration Satellite Service satellite image receiver.
APPENDIX 2
FREQUENCY CONDITIONS AND EMISSION LIMITS APPLIED TO LICENSE-EXEMPT RADIO DEVICES
(Enclosed with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 by Minister of Information and Communications)
1. Frequency conditions and emission limits include the following contents:
Frequency band: stipulate corresponding limits on frequency range of devices.
Type of radio device or application: stipulate name or permitted application of radio device in the List provided in Appendix 1 herein.
Main emission: Specifies maximum limit on field strength or radiated power of main emission which is expressed under the form of Effective Radiated Power (ERP) or Equivalent Isotropic Radiated Power (EIRP) (except for SART device, stipulate minimum radiated power).
Spurious emission: Specifies a maximum limit on the power level of spurious emissions, out-of-band emissions, or minimum emission attenuation relative to the main emission.
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No. |
Frequency band |
Type of radio device or application |
Main emission |
Spurious emission |
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|
A |
B |
C |
D |
|
1. |
9 ÷ 100 kHz |
Inductive Loop device |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
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2. |
100 ÷ 119 kHz |
Inductive Loop device |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
Wireless Power Transfer device |
||||
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3. |
119 ÷ 135 kHz |
Inductive Loop device |
≤ 66 dBµA/m measured at 10m distance (10 dB/decade reduction at frequencies above 119 kHz) |
According to spurious emission limit 1 |
|
Wireless Power Transfer device |
||||
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4. |
135 ÷ 140 kHz |
Inductive Loop device |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
Wireless Power Transfer device |
||||
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5. |
140 ÷ 148.5 kHz |
Inductive Loop device |
≤ 37.7 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
Wireless Power Transfer device |
||||
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6. |
148.5 ÷ 190 kHz |
Inductive Loop device (used for medical application)
|
≤ 30 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
|
|
Inductive Loop device |
≤-15 dBµA/m measured at 10m distance (in a bandwidth of 10 kHz) |
According to spurious emission limit 1 |
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Wireless Power Transfer device |
||||
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7. |
115 ÷ 150 kHz |
Radio Frequency Identification device |
≤ 66 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
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8. |
326.5 kHz 340 kHz |
Wireless Power Transfer device |
≤-15 dBµA/m measured at 10m distance (in a bandwidth of 10 kHz) |
According to spurious emission limit 1 |
|
9. |
353 ÷ 373.5 kHz
|
Wireless Power Transfer device |
≤-15 dBµA/m measured at 10m distance (in a bandwidth of 10 kHz) |
According to spurious emission limit 1 |
|
10. |
1.64 ÷ 1.8 MHz
|
Wireless Power Transfer device |
≤-15 dBµA/m measured at 10m distance (in a bandwidth of 10 kHz) |
According to spurious emission limit 1 |
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11. |
3.155 ÷ 3.400 MHz |
Inductive Loop device |
≤13.5 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
12. |
3.234 ÷ 5.234 kHz |
Short range device used for traffic application (railway) |
≤ 9 dBµA/m at distance of 10 m |
According to spurious emission limit 2 |
|
13. |
6.765 ÷ 6.795 MHz |
Inductive Loop device |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
Wireless Power Transfer device |
||||
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14. |
10.2 ÷ 11 MHz |
Inductive Loop device |
≤ 9 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
15. |
13.553 ÷ 13.567 MHz |
Inductive Loop device |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
Radio Frequency Identification device |
≤ 60 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
||
|
Non-Specific Short Range Devices |
≤ 4.5 mW ERP |
According to spurious emission limit 1 |
||
|
16. |
26.957 ÷ 27.283 MHz |
Remote Control Device |
≤ 100 mW ERP |
According to spurious emission limit 3 |
|
Telemetry Device |
||||
|
Non-Specific Short Range Devices |
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|
|
|
Short range device used for traffic application (railway) |
≤ 42 dBµA/m at distance of 10 m |
According to spurious emission limit 2 |
|
17. |
26.96 ÷ 27.41 MHz |
Radio devices placed on fishing vessels |
≤12 W ERP (single-sideband amplitude modulation: AM/SSB) |
According to spurious emission limit 4 |
|
≤4 W ERP (double-sideband amplitude modulation: AM/DSB, or angle modulation (FM/PM)) |
||||
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18. |
29.7 ÷ 30.0 MHz |
Remote Control Device |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
Radio Detection and Alarm Device |
||||
|
Telemetry Device |
||||
|
19. |
40.02 ÷ 40.98 MHz |
Remote Control Devices (for model craft) |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
20. |
40.66 ÷ 40.7 MHz |
Wireless Audio Device |
≤ 100 mW ERP |
According to spurious emission limit 3 |
|
Remote Control Device |
||||
|
Non-Specific Short Range Devices |
||||
|
21. |
43.71 ÷ 44.00 MHz 46.60 ÷ 46.98 MHz 48.75 ÷ 49.51 MHz 49.66 ÷ 50 MHz |
Cordless phone |
≤ 183 μW ERP |
According to spurious emission limit 5 |
|
22. |
72.00 ÷ 72.99 MHz |
Remote Control Devices (for model craft) |
≤ 1 W ERP |
According to spurious emission limit 5 |
|
23. |
87 ÷ 108 MHz |
Wireless Audio Device (excluding personal FM transmitters) |
≤ 3 μW ERP |
According to spurious emission limit 6 |
|
Personal FM transmitters (in the group of Wireless Audio Devices) |
≤ 20 nW ERP |
|||
|
24. |
121,5 MHz |
Emergency Position Indicating Radio Beacon (EPIRB) |
≤ 100 mW ERPEP |
According to spurious emission limit 23 |
|
|
|
Personal Locator Beacon PLB, Emergency Locator Transmitter (ELT) (integrated with location positioning function using 121.5 MHz frequency) |
|
|
|
25. |
146.35 ÷ 146.5 MHz |
Radio Detection and Alarm Device |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
26. |
156.025 ÷ 162.025 MHz |
Automatic Identification System (AIS) |
≤ 7.7 W ERP (12.5 W EIRP) |
According to spurious emission limit 21 |
|
27. |
161.9625 ÷ 161.9875 MHz |
AIS Search and Rescue Radar Transponder (AIS-SART) |
≤ 7.7 W ERP (12.5 W EIRP) |
According to spurious emission limit 22 |
|
28. |
162.0125 ÷ 162.0375 MHz |
|||
|
29. |
182.025 ÷ 182.975 MHz |
Wireless Audio Device |
≤ 30 mW ERP |
According to spurious emission limit 6 |
|
30. |
216 ÷ 217 MHz |
Telemetry device in medical and biological applications |
≤ 0.01mW ERP |
According to spurious emission limit 5 |
|
31. |
217.025 ÷ 217.975 MHz |
Wireless Audio Device |
≤ 30 mW ERP |
According to spurious emission limit 6 |
|
32. |
218.025 ÷ 218.475 MHz |
Wireless Audio Device |
≤ 30 mW ERP |
According to spurious emission limit 6 |
|
33. |
240.15 ÷ 240.30 MHz |
Radio Detection and Alarm Device |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
34. |
300.00 ÷ 300.33 MHz |
Radio Detection and Alarm Device |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
35. |
312 ÷ 316 MHz |
Radio Detection and Alarm Device |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
Remote Control Device |
||||
|
36. |
401 ÷ 406 MHz |
Medical Implant Communications Systems (MICS) |
≤ 25 μW ERP |
According to spurious emission limit 5 |
|
37. |
401 ÷ 402 MHz 403.5 ÷ 403.8 MHz 405 ÷ 406 MHz |
Medical Implant Telemetry Systems (MITS) |
≤ 100 nW ERP |
|
|
38. |
406.0 ÷ 406.1 MHz |
Emergency Position Indicating Radio Beacon (EPIRB), Personal Locator |
≤ 12.2 W ERP |
According to spurious emission limit 23 |
|
|
|
Beacon (PLB), Emergency Locator Transmitter (ELT) |
|
|
|
39. |
433.05 ÷ 434.79 MHz |
Radio Frequency Identification (RFID) |
≤ 10 mW ERP |
According to spurious emission limit 3 |
|
Remote Control Device |
||||
|
Telemetry Device |
||||
|
Low Power Wide Area Network device (LPWAN) |
≤ 25 mW ERP |
According to spurious emission limit 3 |
||
|
40. |
444.4 ÷ 444.8 MHz |
Radio Detection and Alarm Device |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
41. |
446.0 ÷ 446.2 MHz |
Low-power walkie-talkies |
≤ 500 mW ERP |
According to spurious emission limit 7 |
|
42. |
470 ÷ 694 MHz |
Wireless Audio Devices (used in events) |
≤ 30 mW ERP |
According to spurious emission limit 6 |
|
43. |
918.4 ÷ 923 MHz |
Radio Frequency Identification (RFID) |
≤ 500 mW ERP |
According to spurious emission limit 8 |
|
44. |
918.4 ÷ 923 MHz |
Short range device used for non-specific applications |
≤ 25 mW ERP |
According to spurious emission limit 8 |
|
45. |
918.4 ÷ 923 MHz |
Low Power Wide Area Network device (LPWAN) |
≤ 25 mW ERP |
According to spurious emission limit 9 |
|
46. |
1880 ÷ 1900 MHz |
Cordless phone |
≤ 250 mW EIRP |
According to spurious emission limit 10 |
|
47. |
1795 ÷ 1800 MHz |
Wireless Audio Devices |
≤ 20 mW EIRP. ≤ 50 mW EIRP (for wireless lavalier microphone) |
According to spurious emission limit 6 |
|
48. |
2400 ÷ 2483.5 MHz |
Wireless Local Area Network (WLAN / RLAN) |
≤ 200 mW EIRP (for devices using Frequency-Hopping Spread Spectrum (FHSS) and ≤ 10 mW/1 MHz EIRP for devices using modulation techniques other than FHSS |
According to spurious emission limit 11 |
|
Wireless control device |
≤ 100 mW |
|||
|
|
|
Wireless Video Transmitter |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
|
Short Range Devices for non-specific applications |
≤ 10 mW EIRP |
According to spurious emission limit 13 |
||
|
49. |
2446 ÷ 2454 MHz |
Radio Frequency Identification (RFID) |
≤ 500 mW EIRP |
According to spurious emission limit 13 |
|
50. |
4200 ÷ 4800 MHz |
Ultra-Wide Band (UWB) Communication Devices |
≤ -70 dBm/MHz up to ≤ -41.3 dBm/50 MHz (average power) (details at Appendix 13) |
According to spurious emission limit 24 |
|
51. |
5150 ÷ 5250 MHz |
Wireless Local Area Network (WLAN / RLAN) |
≤ 200 mW EIRP and ≤ 10 mW/MHz |
According to spurious emission limit 14 |
|
52. |
5250 ÷ 5350 MHz |
Wireless Local Area Network (WLAN) |
≤ 200 mW EIRP and ≤ 10 mW/MHz (if the device has TPC function); ≤ 200 mW EIRP and ≤ 10 mW/MHz (if the device does not have TPC function)
|
According to spurious emission limit 14 |
|
53. |
5470 ÷ 5725 MHz |
Wireless Local Area Network (WLAN / RLAN) |
≤ 1 W EIRP and ≤ 50 mW/MHz (if the device has TPC function); ≤ 500 mW EIRP and ≤ 25 mW/MHz (if the device does not have TPC function)
|
According to spurious emission limit 14 |
|
54. |
5725 ÷ 5850 MHz |
Wireless Local Area Network (WLAN / RLAN) |
≤ 1 W EIRP and ≤ 50 mW/MHz |
According to spurious emission limit 14 |
|
Wireless Video Transmitter |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
||
|
Telemetry device |
≤ 100 mW EIRP |
According to spurious emission limit 14 |
||
|
No. |
Frequency band |
Type of radio device or application |
Main emission |
Spurious emission |
|
|
A |
B |
C |
D |
|
|
|
Short Range Devices for non-specific applications |
≤ 25 mW EIRP |
According to spurious emission limit 13 |
|
|
|
Telemetry device (Short range radar used in closed storage tank) |
≤ 24 dBm/50MHz EIRP (peak power) ≤ -41.3 dBm/MHz EIRP (measured at outside of storage tank) |
According to spurious emission limit 15 |
|
55. |
7238.4 ÷ 9000 MHz |
Ultra-Wide Band (UWB) Communication Devices |
≤ -65 dBm/MHz up to ≤ -41.3 dBm/50 MHz (average power) (details at Appendix 13) |
According to spurious emission limit 24 |
|
56. |
8500 ÷ 1000 MHz |
Telemetry device (Short range radar used in closed storage tank) |
≤ 30 dBm/50MHz (peak power) ≤ -41.3 dBm/MHz EIRP (measured at outside of storage tank) |
According to spurious emission limit 15 |
|
57. |
9200 ÷ 9500 MHz |
Search and Rescue Radar Transponder (SART) |
≥ 400 mW EIRP |
Not specified |
|
58. |
10.5 ÷ 10.55 GHz |
Wireless Video Transmitter |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
|
59. |
24 ÷ 24.25 GHz |
Wireless Video Transmitter |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
|
Telemetry Devices |
According to spurious emission limit 13 |
|||
|
Non-Specific Short Range Devices |
According to spurious emission limit 13 |
|||
|
Short range device used for traffic application (traffic radar) |
≤ 100 mW EIRP |
According to spurious emission limit 16 |
||
|
60. |
57 ÷ 64 GHz |
Short range device used for non-specific application |
≤ 10 mW EIRP |
According to spurious emission limit 20 |
|
Telemetry device (Short range radar used in closed storage tank) |
≤ 43 dBm/50MHz (peak power) ≤ -41.3 dBm/MHz EIRP (measured at outside of storage tank) |
According to spurious emission limit 15 |
||
|
Telemetry Devices (short range radar) |
≤ 35 dBm/50MHz EIRP (peak power) |
≥ 20 dBc at output of transmitter |
||
|
|
|
|
≤ -2 dBm/MHz EIRP (average power) |
|
|
61. |
57 ÷ 66 GHz |
Wireless Local Area Network Devices (WLAN / RLAN) |
≤ 10 W EIRP |
According to spurious emission limit 17 |
|
62. |
61 ÷ 61.5 GHz |
Short Range Devices for non-specific application |
≤ 100 mW EIRP |
According to spurious emission limit 20 |
|
63. |
75 ÷ 85 GHz |
Telemetry device (Short range radar used in closed storage tank) |
≤ 43 dBm/50MHz EIRP (peak power) ≤ -41.3 dBm/MHz EIRP (measured at outside of storage tank) |
According to spurious emission limit 15 |
|
Telemetry device (Short range radar) |
≤ 34 dBm/50MHz EIRP (peak power) ≤ -3 dBm/MHz EIRP (everage power) |
≥ 20 dBc at output of transmitter |
||
|
64. |
76 ÷ 77 GHz |
Short range device used for traffic application (Radar used for traffic application) |
≤ 316.23 W/50MHz EIRP |
According to spurious emission limit 18 |
|
65. |
77 ÷ 81 GHz |
Short range device used for traffic application (Radar used for traffic application) |
≤ 316.23 W EIRP/50 MHz and ≤ 0.5 mW/MHz EIRP |
According to spurious emission limit 19 |
|
57. |
122 ÷ 123 GHz |
Short Range Devices for non-specific application |
≤ 100 mW EIRP (≤ 10 mW/250MHz EIRP at 122 ÷ 122.25 GHz band) |
According to spurious emission limit 20 |
|
58. |
244 ÷ 246 GHz |
Short Range Devices for non-specific application |
≤ 100 mW EIRP |
According to spurious emission limit 20 |
2. Classification of limits for spurious emission and unwanted emission
2.1. Spurious emission limit 1: Ensure compliance with spurious emission limit of transmitter specified by National Technical Regulation QCVN 55:2011/BTTTT (Note 2)
2.2. Spurious emission limit 2 (Ensure compliance with spurious emission limit of transmitter according to ETSI EN 302 608 V2.1.1 (2017-11) (Note 3)):
|
Frequency (f) |
Limit ( at distance of 10m ) |
|
9 kHz ≤ f < 150 kHz |
44 dBμA/m at 9 kHz and decrease in the logarithm of the frequency to a value of 19 dBμA/m at 150 kHz. |
|
150 kHz ≤ f < 30 MHz |
54 dBμA/m at 150 kHz and decreases in the logarithm of the frequency to a value of 4 dBμA/m at 30 MHz. |
|
30 MHz ≤ f < 1 GHz |
79 dBμV/m at 30 MHz and decrease in the logarithm of the frequency to 54 dBμV/m at 1 GHz. |
2.3. Spurious emission limit 3: Ensure compliance with spurious emission limit of transmitter specified by National technical regulation QCVN 73:2013/BTTTT (Note 2)
The above spurious emission limits also apply to low-power wide-area network radio equipment specified in Clause 2, Article 5 of this Circular.
2.4. Spurious emission limit 4: Ensure compliance with transmitter spurious emission limits specified in National Technical Regulation QCVN 23:2011/BTTTT for angle-modulated radio equipment and QCVN 25:2011/BTTTT for single-side/duplex-modulated radio equipment (Note 2).
2.5. Spurious emission limit 5: Ensure compliance with low power radio transmitter spurious emission limits specified in National Technical Regulation QCVN 47:2015/BTTTT (Note 2).
2.6. Spurious emission limit 6: Ensure compliance with transmitter spurious emission limits specified in National Technical Regulation QCVN 91:2015/BTTTT (Note 2).
2.7. Spurious emission limit 7: Ensure compliance with transmitter spurious emission limits specified in National Technical Regulation QCVN 42:2011/BTTTT (Note 2).
2.8. Spurious emission limit 8 (Ensure compliance with the transmitter spurious emission limit specified by Recommendation No. 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/100 kHz |
|
At other frequencies under 1000 MHz |
-36 dBm (250nW) |
|
At other frequencies above 1000 MHz |
-30 dBm (1µW) |
2.9. Spurious emission limit 9: Ensure compliance with transmitter spurious emission limits specified in National Technical Regulation QCVN 122:2020/BTTTT (Note 2).
In the case of Low-power wide-area network radio equipment located in the same location with a mobile communication base station operating in the band 880-915 MHz, limit spurious emissions from Low-power wide-area network radio equipment must not exceed -98 dBm/100 kHz or in the range from -98 dBm/100 kHz to -36 dBm/100 kHz if an agreement is settled between organizations and individuals deploying Low-power wide-area network radio equipment and organizations and enterprises deploying mobile communication systems in the band 880-915 MHz.
The above spurious emission limits also apply to low-power wide-area network radio equipment specified in Clause 2, Article 5 of this Circular.
2.10. Spurious emission limit 10 (transmitter spurious emission limit must comply with 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 under 1000 MHz |
-36 dBm (250nW) |
|
At other frequencies above 1000 MHz |
-30 dBm (1µW) |
2.11. Spurious emission limit 11: Ensure compliance with transmitter spurious emission limits specified in National Technical Regulation QCVN 54:2020/BTTTT (Note 2).
2.12. Spurious emission limit 12: Ensure compliance with transmitter spurious emission limit specified in National Technical Regulation QCVN 92:2015/BTTTT (Note 2).
2.13. Spurious emission limit 13: Ensure compliance with transmitter spurious emission limits specified in National Technical Regulation QCVN 74:2020/BTTTT (Note 2).
2.14. Spurious emission limit 14: Ensure compliance with transmitter spurious emission limit specified in National Technical Regulation QCVN 65:2013/BTTTT (Note 2).
2.15. Spurious emission limit 15 (transmitter spurious emission limit must comply with ETSI EN 302 372 v2.1.1 (Note 3):
|
Frequency (f) |
Limit (measured at outside of storage tank and inside of allocated frequency band) |
Limit (measured at outside of storage tank and outside of allocated frequency band) |
|
f < 1GHz |
-51.3 dBm/MHz |
-61.3 dBm/MHz |
|
f ≥ 1GHz |
-41.3 dBm/MHz |
-51.3 dBm/MHz -60 dBm/MHz (for 10.6 – 10.7 frequency band) |
2.16. Spurious emission limit 16 (transmitter spurious emission limit must comply with ETSI EN 302 858 v2.1.1 (Note 3):
|
Frequency (f) |
Limit |
|
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 30MHz upto 1000 MHz |
-36 dBm (250nW) |
|
At other frequencies from above 1000 MHz upto 50.000 MHz |
-30 dBm/ (1µW) |
2.17. Spurious emission limit 17: Ensure compliance with transmitter spurious emission limit specified in National Technical Regulation QCVN 88:2015/BTTTT (Note 2).
2.18. Spurious emission limit 18 (transmitter spurious emission limit must comply with ETSI EN 301 091-1 v2.1.1 (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 |
|
At other frequencies from 30MHz upto 1000 MHz |
-36 dBm |
|
1000 MHz < f ≤ 300.000 MHz |
-30 dBm |
2.19. Spurious emission limit 19 (transmitter spurious emission limit must comply with ETSI EN 302 264 v2.1.1 (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 |
|
At other frequencies from 30MHz upto 1000 MHz |
-36 dBm |
|
1000 MHz < f ≤ 300.000 MHz |
-30 dBm |
2.20. Spurious emission limit 20 (transmitter spurious emission limit must comply with ETSI EN 305 550-2 v2.1.1 (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 |
|
At other frequencies from 30MHz upto 1000 MHz |
-36 dBm |
|
1000 MHz < f ≤ 300.000 MHz |
-30 dBm |
2.21. Spurious emission limit 21: Ensure compliance with transmitter spurious emission limit according to National Technical Regulation QCVN 68:2013/BTTTT(Note 2).
2.22. Spurious emission limit 22: Ensure compliance with transmitter spurious emission limit according to National Technical Regulation QCVN 107:2016/BTTTT(Note 2).
2.23. Spurious emission limit 23: Ensure compliance with transmitter spurious emission limit according to National Technical Regulation QCVN 57:2011/BTTTT(Note 2).
2.24. Spurious emission limit 24 (transmitter spurious emission limit must comply with ETSI EN 302 065-1 v2.1.1 (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 |
|
At other frequencies from 30MHz upto 1000 MHz |
-36 dBm |
|
1000 MHz < f ≤ 40.000 MHz |
-30 dBm |
Note 2: In case the respective national technical regulation is amended, supplemented, or replaced after the effective date of this Circular, the limit of spurious or unwanted emissions as prescribed shall apply in the National Technical Regulations to amend, supplement or replace.
Note 3: In case the Ministry of Information and Communications promulgates the national technical regulation applicable to the corresponding radio equipment in column B, Section 1 of Appendix 2 to this Circular after the effective date of this Circular, when the regulation comes into effect, the spurious or unwanted emission limits specified in the National Technical Regulation shall apply.
3. Measurement method: Comply with the provisions of the National Technical Regulations and the corresponding technical standards specified in Section 2 of this Appendix.
APPENDIX 3
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT SHORT RANGE DEVICES FOR NON-SPECIFIC APPLICATION
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission |
Spurious emission |
Other conditions |
|
13.553 ÷ 13.567 MHz |
≤ 4.5 mW ERP |
According to spurious emission limit 1 |
|
|
26.957 ÷ 27.283 MHz |
≤ 100 mW ERP |
According to spurious emission limit 3 |
|
|
40.66-40.7 MHz |
≤ 10 mW ERP |
According to spurious emission limit 3 |
|
|
918.4 ÷ 923 MHz |
≤ 25 mW ERP |
According to spurious emission limit 8 |
- Device must have LBT feature (Listen Before Talk) or operating time of device must be less than 1% duty cycle. |
|
2400 ÷ 2483.5 MHz |
≤ 10 mW EIRP |
According to spurious emission limit 13 |
|
|
5725 ÷ 5850 MHz |
≤ 25 mW EIRP |
According to spurious emission limit 13 |
|
|
24 ÷ 24.25 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 13 |
|
|
57 ÷ 64 GHz |
≤ 10 mW EIRP |
According to spurious emission limit 20 |
|
|
61 ÷ 61.5 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 20 |
|
|
122 ÷ 123 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 20 |
- The power spectrum density in the band 122 ÷ 122.25 GHz must not exceed 10 mW EIRP/250 MHz |
|
244 ÷ 246 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 20 |
|
APPENDIX 4
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT CORDLESS PHONES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
43.71 ÷ 44.00 MHz |
≤ 183 μW ERP |
According to spurious emission limit 5 |
- Frequency bands for the base unit - Device may only use frequency modulation telephony (F3E) or phase modulation telephony (G3E). |
|
48.75 ÷ 49.51 MHz |
≤ 183 μW ERP |
According to spurious emission limit 5 |
- Frequency bands for the mobile unit - Device may only use frequency modulation telephony (F3E) or phase modulation telephony (G3E). |
|
46.60 ÷ 46.98 MHz |
≤ 183 μW ERP |
According to spurious emission limit 5 |
- Frequency bands for the base unit - Device may only use frequency modulation telephony (F3E) or phase modulation telephony (G3E). |
|
49.66 ÷ 50 MHz |
≤ 183 μW ERP |
According to spurious emission limit 5 |
- Frequency bands for the mobile unit - Device may only use frequency modulation telephony (F3E) or phase modulation telephony (G3E). |
|
1880 ÷ 1900 MHz |
≤ 250 mW EIRP |
According to spurious emission limit 10 |
- Indoor use only. |
APPENDIX 5
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT MEDICAL IMPLANT COMMUNICATIONS SYSTEMS (MICS) AND MEDICAL IMPLANT TELEMETRY SYSTEMS (MITS)
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
401 ÷ 406 MHz |
25 μW ERP |
According to spurious emission limit 5 |
- Frequency bands for MICS. - The width of occupying channel shall not exceed 300 kHz. - MICS must have at least 9 frequency channels arranged on the 401 ÷ 406 MHz frequency band. - MICS must use the Listen Before Talk transmission protocol. - MICS may only transmit data when controled from the external sources. In an emergency where problems which may cause danger to the life or health of the patient are discovered, MICS may immediately transmit data. |
|
401 ÷ 402 MHz; 403.5 ÷ 403.8 MHz; 405 ÷ 406MHz |
100 nW ERP |
According to spurious emission limit 5 |
- Frequency bands for MITS. |
APPENDIX 6
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT RADIO FREQUENCY IDENTIFICATION (RFID)
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
115 ÷ 150 kHz |
≤ 60 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
- Center frequencies are 125 kHz and 134.2 kHz |
|
13.553 ÷ 13.567 MHz |
≤ 60 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
- Center frequency is 13.56 MHz |
|
433.05 ÷ 434.79 MHz |
≤ 10 mW ERP |
According to spurious emission limit 3 |
- Center frequency is 433.92 MHz - Equipment must use harmful interference reduction techniques such as frequency hopping spread spectrum modulation, Listen Before Talk (LBT) transmission protocol, duty cycle limitation, or controlling transmitting power. |
|
918.4 ÷ 923 MHz |
≤ 500 mW ERP |
According to spurious emission limit 8 |
- The maximum allowed bandwidth of the hopping channel at 20 dB depletion is 500 kHz. - Equipment must use harmful interference reduction techniques such as frequency hopping spread spectrum modulation, Listen Before Talk (LBT) transmission protocol, or duty cycle limitation. |
|
2446 ÷ 2454 MHz |
≤ 500 mW EIRP |
According to spurious emission limit 13 |
|
APPENDIX 7
FREQUENCY CONDITIONS AND EMISSION LIMITS APPLIED TO LICENSE-EXEMPT RADIO DETECTION AND ALARM DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
|
29.7 ÷ 30.0 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
146.35 ÷ 146.5 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
240.15 ÷ 240.30 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
300 ÷ 300.33 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
312 ÷ 316 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
444.4 ÷ 444.8 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
APPENDIX 8
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT WIRELESS AUDIO DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
40.66 ÷ 40.70 MHz |
≤ 100 mW ERP |
According to spurious emission limit 6 |
|
|
87 ÷ 108 MHz |
≤ 20 nW ERP |
According to spurious emission limit 6 |
- Personal FM transmitter may only use 87 ÷ 108 MHz frequency band. - Channelwidth must not exceed 200 kHz and must entirely locate within the prescribed frequency band. |
|
≤ 3 µW ERP |
According to spurious emission limit 6 |
- This limit is applied to wireless audio device (except for personal FM transmitter) - Channelwidth must not exceed 200 kHz and must entirely locate within the prescribed frequency band. |
|
|
182.025 ÷ 182.975 MHz |
≤ 30 mW ERP |
According to spurious emission limit 6 |
- Channelwidth must not exceed 200 kHz and must entirely locate within the prescribed frequency band. |
|
217.025 ÷ 217.975 MHz |
≤ 30 mW ERP |
According to spurious emission limit 6 |
- Channelwidth must not exceed 200 kHz and must entirely locate within the prescribed frequency band. |
|
218.025 ÷ 218.475 MHz |
≤ 30 mW ERP |
According to spurious emission limit 6 |
- Channelwidth must not exceed 200 kHz and must entirely locate within the prescribed frequency band. |
|
470 ÷ 694 MHz |
≤ 30 mW ERP |
According to spurious emission limit 6 |
- Wireless Audio Devices for events - Channelwidth must not exceed 200 kHz and must entirely locate within the prescribed frequency band. - Device must have frequency automatically adjusted function and may manually adjust frequency also. - The device must not operate in conjunction with broadcast TV channels in the operating area. - Minimum distance between the center frequency of device when it operates and adjacent or upper and lower adjacent frequencies of TV channel(s) in the operating area is 400 kHz. - Device is not allowed to cause harmful interference to television receivers in the operation area. |
|
1795 ÷ 1800 MHz |
≤ 20 mW EIRP; ≤ 50 mW EIRP (for lavalier microphone) |
According to spurious emission limit 6 |
|
APPENDIX 9
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT REMOTE CONTROL DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
26.957 ÷ 27.283 MHz |
≤ 100 mW ERP |
According to spurious emission limit 3 |
Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
|
29.7 ÷ 30.0 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
|
40.02 ÷ 40.98 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
For controlling aircraft models only. Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
|
40.66 ÷ 40.70 MHz |
≤ 100 mW ERP |
According to spurious emission limit 3 |
Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
|
72.00 ÷ 72.99 MHz |
≤ 1 W ERP |
According to spurious emission limit 5 |
For controlling aircraft models only. Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
|
312 ÷ 316 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
|
433.05 ÷ 434.79 MHz |
≤ 10 mW ERP |
According to spurious emission limit 3 |
Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. - Equipment must use harmful interference reduction techniques such as frequency hopping spread spectrum modulation, Listen Before Talk (LBT) transmission protocol, or duty cycle limitation. |
|
2400 ÷ 2483.5 MHz |
≤ 100 mW ERP |
According to spurious emission limit 11 |
Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
|
5725 ÷ 5850 MHz |
≤ 100 mW ERP |
According to spurious emission limit 14 |
Organizations and individuals exploiting and using radio remote control devices in aircraft models must comply with the provisions of the law on licensing of flight operations. |
APPENDIX 10
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT WIRELESS LOCAL AREA NETWORK (WLAN/RLAN) DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
2400 ÷ 2483.5 MHz |
≤ 200 mW EIRP (for device using frequency hopping spread spectrum (FHSS) modulation technique and 10 mW/MHz EIRP for device using modulation technique other than FHS |
According to spurious emission limit 11 |
Organizations and individuals exploiting and using WLAN/RLAN devices must comply with the provisions of the law on telecommunications, information security and data protection.. |
|
5150 ÷ 5250 MHz |
≤ 200 mW EIRP and 10 mW/MHz EIRP |
According to spurious emission limit 14 |
- For indoor use or electromagnetic shielded environment (eg: used in car). - Organizations and individuals exploiting and using WLAN/RLAN devices must comply with the provisions of the law on telecommunications, information security and data protection. |
|
5250 ÷ 5350 MHz |
≤ 200 mW EIRP and ≤ 10 mW/MHz EIRP (If the product has transmit power control function) ≤ 200 mW EIRP and ≤ 5 mW/MHz EIRP (If the product does not have transmit power control function) |
According to spurious emission limit 14 |
- Device must have Dynamic Frequency Selection (DFS) feature. - Organizations and individuals exploiting and using WLAN/RLAN devices must comply with the provisions of the law on telecommunications, information security and data protection. |
|
5470 ÷ 5725 MHz |
≤ 1 W EIRP and ≤ 50 mW/MHz (If the product has transmit power control function) ≤ 500mW EIRP and ≤ 25 mW/MHz (If the product does not have transmit power control function)
|
According to spurious emission limit 14 |
- Device must have Dynamic Frequency Selection (DFS) feature. - Organizations and individuals exploiting and using WLAN/RLAN devices must comply with the provisions of the law on telecommunications, information security and data protection. |
|
5725 ÷ 5850 MHz |
≤ 1 W EIRP and 50 mW/MHz |
According to spurious emission limit 14 |
Organizations and individuals exploiting and using WLAN/RLAN devices must comply with the provisions of the law on telecommunications, information security and data protection. |
|
57 ÷ 66 GHz |
≤ 10 W EIRP |
According to spurious emission limit 17 |
- Device must use integrated antenna - Do not install the device at a fixed outdoor location - Organizations and individuals exploiting and using WLAN/RLAN devices must comply with the provisions of the law on telecommunications, information security and data protection. |
APPENDIX 11
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT TELEMETRY DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
26.957 ÷ 27.283 MHz |
≤ 100 mW ERP |
According to spurious emission limit 3 |
|
|
29.70 ÷ 30.00 MHz |
≤ 100 mW ERP |
According to spurious emission limit 5 |
|
|
216 ÷ 217 MHz |
≤ 0.01 mW ERP |
According to spurious emission limit 5 |
- For medical and biological applications only. |
|
433.05 ÷ 434.79 MHz |
≤ 10 mW ERP |
According to spurious emission limit 3 |
- Equipment must use harmful interference reduction techniques such as frequency hopping spread spectrum modulation, Listen Before Talk, duty cycle limitation, or transmit power control. |
|
5725 ÷ 5850 MHz |
≤ 24dBm/50 MHz EIRP (peak power) ≤ -41.3 dBm/MHz (measured outside storage tank) |
According to spurious emission limit 15 |
Only allowed for short range radar and the device must be mounted inside storage tank with transmitting antenna pointing downwards. This equipment must be exploited, installed, and used by organizations and individuals with technical expertise. |
|
8500 ÷ 10000 MHz |
≤ 30dBm/50 MHz EIRP (peak power) ≤ -41.3 dBm/MHz (measured outside storage tank) |
According to spurious emission limit 15 |
Only allowed for short range radar and the device must be mounted inside storage tank with transmitting antenna pointing downwards. This equipment must be exploited, installed, and used by organizations and individuals with technical expertise. |
|
24 ÷ 24.25 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 13 |
|
|
57 ÷ 64 GHz |
≤ 43dBm/50 MHz EIRP (peak power) ≤ -41.3 dBm/MHz (measured outside storage tank) |
According to spurious emission limit 15 |
Only allowed for short range radar and the device must be mounted inside storage tank with transmitting antenna pointing downwards. This equipment must be exploited, installed, and used by organizations and individuals with technical expertise. |
|
≤ -2dBm/50 MHz EIRP (average power) ≤ 35 dBm/MHz (peak power) |
≥ 20 dBc at output of transmitter |
Only allowed for short range radar and the device must be mounted inside storage tank with transmitting antenna pointing downwards. This equipment must be exploited, installed, and used by organizations and individuals with technical expertise. |
|
|
75 ÷ 85 GHz |
≤ 43dBm/50 MHz EIRP (peak power) ≤ -41.3 dBm/MHz (measured outside storage tank) |
According to spurious emission limit 15 |
Only allowed for short range radar and the device must be mounted inside storage tank with transmitting antenna pointing downwards. This equipment must be exploited, installed, and used by organizations and individuals with technical expertise. |
|
≤ -3dBm/50 MHz EIRP (average power) ≤ 35 dBm/MHz (peak power) |
≥ 20 dBc at output of transmitter |
Only allowed for short range radar and the device must be mounted inside storage tank with transmitting antenna pointing downwards. This equipment must be exploited, installed, and used by organizations and individuals with technical expertise. |
APPENDIX 12
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT WIRELESS VIDEO TRANSMITTERS
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
|
2400 ÷ 2483.5 MHz |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
|
5725 ÷ 5850 MHz |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
|
10.50 ÷ 10.55 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
|
24.00 ÷ 24.25 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 12 |
APPENDIX 13
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT ULTRA-WIDE BAND COMMUNICATION DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
4200 ÷ 4800 MHz |
≤ -70 dBm/MHz (average power) ≤ -30 dBm/50 MHz (peak power) |
According to spurious emission limit 24 |
- Do not install the device at a fixed outdoor location or connect the device to a fixed outdoor antenna - Device is used indoor or in the environment where device is shielded against radio waves; - Not for use on airplanes. |
|
≤ -41.4 dBm/MHz (average power) and ≤ 0 dBm/50 MHz (peak power) |
According to spurious emission limit 24 |
- Equipment must use harmful interference reduction techniques such as Listen Before Talk (LBT), duty cycle limitation, or Detect and Avoid (DAA) - Do not install the device at a fixed outdoor location or connect the device to a fixed outdoor antenna |
|
|
7238.4 ÷ 9000 MHz |
- From 7238.4 upto 8500 Mhz: ≤ -41.3 dBm/MHz (average power) and ≤ 0 dBm/50 MHz (peak power) |
According to spurious emission limit 24 |
- Do not install the device at a fixed outdoor location or connect the device to a fixed outdoor antenna |
|
- From 8500 upto 9000 Mhz: ≤ -65 dBm/MHz (average power) and ≤ -25 dBm/50 MHz (peak power) |
|||
|
|
- From 7238.4 upto 8500 Mhz: ≤ -41.3 dBm/MHz (average power) and ≤ 0 dBm/50 MHz (peak power) |
According to spurious emission limit 24 |
- Equipment must use harmful interference reduction techniques such as Listen Before Talk (LBT), duty cycle limitation, or Detect and Avoid (DAA) - Do not install the device at a fixed outdoor location or connect the device to a fixed outdoor antenna |
APPENDIX 14
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT RADAR USED IN TRAFFIC APPLICATIONS
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
|
|
3.234 ÷ 5.234 MHz |
≤ 9 dBµA/m measured at distance of 10m |
According to spurious emission limit 2 |
- Used for short range device for communication between train and rail to determine position of the train on its journey - Device must use with duty cycle does not exceed 1% |
|
26.957 ÷ 27.283 MHz |
≤ 42 dBµ A/m measured at distance of 10m |
According to spurious emission limit 2 |
- Used for short range device for communication between train and rail to determine position of the train on its journey - Center frequency is 27.095 MHz |
|
24 ÷ 24,25 GHz |
≤ 100 mW EIRP |
According to spurious emission limit 16 |
Used for radar device in traffic application |
|
76 ÷ 77 GHz |
≤ 316.23 W EIRP (peak power) |
According to spurious emission limit 18 |
Used for radar device in traffic application |
|
77 ÷ 81 GHz |
≤ 316.23 W EIRP (peak power, measured at 50 MHz bandwidth) and ≤ 0.5 mW/MHz EIRP (average power spectral density) |
According to spurious emission limit 19 |
Used for radar device in traffic application |
APPENDIX 15
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT INDUCTIVE LOOP DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
9 ÷ 100 kHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
|
100 ÷ 119 kHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
|
119 ÷ 135 kHz |
≤ 66 dBµA/m measured at 10m distance (10 dBm/decade reduction at frequency above 119 kHz) |
According to spurious emission limit 1 |
Limit of 42 dBµA/m measured at 10m distance applies to frequency 129.1 +/-500 Hz |
|
135 ÷ 140 kHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
|
140 ÷ 148.5 kHz |
≤ 37.7 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
|
148.5 ÷ 190 kHz |
≤ 30 dBµA/m measured at distance of 10m. |
According to spurious emission limit 1 |
- Used in medical information application. - Devices must be guaranteed to operate with Duty cycle not exceed 10% |
|
148.5 ÷ 190 kHz |
≤ -15 dBµ A/m measure at distance of 10m (in bandwidth of 10 kHz) |
According to spurious emission limit 1 |
|
|
3.155 ÷ 3400 kHz |
≤ -13.5 dBµ A/m measured at distance of 10m |
According to spurious emission limit 1 |
|
|
6.765 ÷ 6.795 MHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
|
10.200 ÷ 11.000 MHz |
≤ 9 dBµA/m at distance of 10m |
According to spurious emission limit 1 |
|
|
13.553 ÷ 13.567 MHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
APPENDIX 16
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT WIRELESS POWER TRANSFER DEVICES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
100 ÷ 119 kHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
For device using inductive loop technology |
|
119 ÷ 135 kHz |
≤ 66 dBµA/m measured at 10m distance (10 dBm/decade reduction at frequency above 119 kHz) |
According to spurious emission limit 1 |
- Limit of 42 dBµA/m measured at 10m distance applies to frequency 129.1 +/-500 Hz - For device using inductive loop technology |
|
135 ÷ 140 kHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
For device using inductive loop technology |
|
140 ÷ 148.5 kHz |
≤ 37.7 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
For device using inductive loop technology |
|
148.5 ÷ 190 kHz |
≤ -15 dBµ A/m measure at distance of 10m (in bandwidth of 10 kHz) |
According to spurious emission limit 1 |
For device using inductive loop technology |
|
326.5 kHz 340 kHz |
≤ -15 dBµ A/m measure at distance of 10m (in bandwidth of 10 kHz) |
According to spurious emission limit 1 |
- For device using inductive loop technology - Do not install the device at a fixed outdoor location or connect the device to a fixed outdoor antenna - Do not use on airplane |
|
353 ÷ 373.5 kHz |
≤ -15 dBµ A/m measure at distance of 10m (in bandwidth of 10 kHz) |
According to spurious emission limit 1 |
- For device using inductive loop technology - Do not install the device at a fixed outdoor location or connect the device to a fixed outdoor antenna - Do not use on airplane |
|
1.64 ÷ 1.8 MHz |
≤ -15 dBµ A/m measure at distance of 10m (in bandwidth of 10 kHz) |
According to spurious emission limit 1 |
For device using inductive loop technology |
|
6.765 ÷ 6.795 MHz |
≤ 42 dBµA/m measured at 10m distance |
According to spurious emission limit 1 |
|
APPENDIX 17
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT RADIO DEVICES PLACED ON FISHING VESSELS
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
26.96 MHz ÷ 27.41 MHz |
≤12 W ERP (single-sideband amplitude modulation: AM/SSB) ≤4 W ERP (double-sideband amplitude modulation): AM/DSB, or angle modulation: frequency modulation (FM/PM))
|
According to spurious emission limit 2 |
- This frequency band is divided into 40 channels from channel 1 to channel 40; each frequency channel is corresponding to center frequency and using purposes specified in Note 4. - Note 5. |
- Note 4: Center frequencies and using purposes of frequency channels
|
Channel |
Center frequency (MHz) |
Using purposes |
|
Channel |
Center frequency (MHz) |
Using purposes |
|
1 |
26.965 |
Communication channel |
21 |
27.215 |
Communication channel
|
|
|
2 |
26.975 |
22 |
27.225 |
|||
|
3 |
26.985 |
23 |
27.235 |
|||
|
4 |
27.005 |
24 |
27.245 |
|||
|
5 |
27.015 |
25 |
27.255 |
|||
|
6 |
27.025 |
26 |
27.265 |
|||
|
7 |
27.035 |
27 |
27.275 |
|||
|
8 |
27.055 |
28 |
27.285 |
|||
|
9 |
27.065 |
Safety and rescue channel |
29 |
27.295 |
||
|
10 |
27.075 |
Communication channel |
30 |
27.305 |
||
|
11 |
27.085 |
Calling channel |
31 |
27.315 |
||
|
12 |
27.105 |
Communication channel |
|
32 |
27.325 |
|
|
13 |
27.115 |
33 |
27.335 |
|||
|
14 |
27.125 |
34 |
27.345 |
|||
|
15 |
27.135 |
35 |
27.355 |
|||
|
16 |
27.155 |
36 |
27.365 |
|||
|
17 |
27.165 |
37 |
27.375 |
|||
|
18 |
27.175 |
38 |
27.385 |
|||
|
19 |
27.185 |
Calling channel |
39 |
27.395 |
||
|
20 |
27.205 |
Communication channel |
40 |
27.405 |
In the above table, channels are provided for as follows:
Safety and rescue channel provides safety and rescue information.
Communication channel serves the exchange of information and messages.
Calling channel serves making of calls.
- Note 5:
1.1. Conditions for using safety and rescue channel
1.1.1. In an emergency where people and vessels at sea may face danger, relevant organizations and individuals may, in addition to the use of channel 9 (serve safety and rescue information), create waves to attract attention on any channels in the Table of frequency allocations when sending distress signals.
1.1.2. When receiving distress signals, radio stations must immediately stop transmitting waves on the frequency which may cause interference to distress signals and keep listening in on frequencies designated for transmission of distress signals; reply and provide necessary assistance, and inform search and rescue agencies.
1.2. Conditions for using calling channel
1.2.1. Calling channels (channel 11 and channel 19) are dedicated for making calls between fishing vessels.
1.2.2. Maximum length of call made on the calling channel is 1 minute. The calling station must say its name and call name of the receiving station (3 times) on the calling channel. Immediately after receiving response from the receiving station, the calling station must actively name the communication channel so that both stations communicate on such communication channel; the communication on the calling channel is not allowed.
1.3. Conditions for using communication channel
1.3.1. Communication channel is selected from 37 channels according to the Table of frequency allocations (excluding safety and rescue channel, and calling channels). If the selected communication channel is interfered by other stations, the communication may be transferred to another communication channel to avoid the interference.
1.3.2. Communications between stations on a communication channel shall not exceed 5 minutes. If the exchange requires a period more than 5 minutes, the communication must be stopped for one minute before it is continued.
1.4. The following acts are prohibited:
1.4.1. Use a power exceeding the radiated power limits prescribed in this Appendix.
1.4.2. Cause harmful interference to the safety and rescue channel.
1.4.3. Use the safety and rescue channel for making calls and communications.
1.4.4. Use the calling channel for communication activities (unless the transmission of distress signals).
1.4.5. Make communications on the communication channel for a consecutive period of exceeding 5 minutes or generate any carrier interfering between calls.
1.4.6. Send call or identification signals consecutively or repeatedly for a period of more than 1 minute on the calling channel.
1.4.7. Send identification signals on two or several frequencies at the same time in order to contact with the only station.
APPENDIX 18
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT LOW-POWER WALKIE-TALKIES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
446.00 ÷ 446.2 MHz |
≤ 500 mW ERP |
According to spurious emission limit 7 |
- Device uses digital technologies with the width of each frequency channel of 6.25 kHz or 12.5 kHz. - Center frequencies of 12.5 kHz channels: 446.00625+n*0.0125 (n = 0 ~ 15) - Center frequencies of 6.25 kHz channels: 446.003125+n*0.00625 (n = 0 ~ 31) - Device must use integrated antenna. Device must be designed so as not to adjust frequencies out of the 446-446.2 MHz frequency band and not to increase the power to more than 500 mW. - Device must be automatically stopped when it operates for a period of exceeding 180 seconds. - The frequency channel should be checked before making communications to avoid interference. |
APPENDIX 19
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO LICENSE-EXEMPT
LOW-POWER WIDE AREA NETWORK (LPWAN)
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission (maximum radiated power) |
Spurious emission (maximum power or minimum emission depletion) |
Other conditions |
|
433.05 ÷ 434.79 MHz |
≤ 25 mW ERP |
According to spurious emission limit 3 |
- Limit the duty cycle (Duty cycle) to no more than 10% for data transmission equipment (Gateway) and not more than 1% for terminal equipment. - Organizations and individuals deploying and using LPWAN equipment need to comply with the provisions of the law on telecommunications, information security, and data protection in accordance with the law. |
|
920 ÷ 923 MHz |
≤ 25 mW ERP |
According to spurious emission limit 9 (Note 6) |
- Limit the duty cycle (Duty cycle) to no more than 10% for data transmission equipment (Gateway) and not more than 1% for terminal equipment. - Organizations and individuals deploying and using LPWAN equipment need to comply with the provisions of the law on telecommunications, information security, and data protection in accordance with the law. |
Note 6: Where radio equipment in a low-power wide area network is co-located with a mobile base station operating in the band 880-915 MHz, limit spurious emissions from radio equipment. in a low-power wide-area network must not exceed -98 dBm/100 kHz, or within the range from -98 dBm/100 kHz to -36 dBm/100 kHz if an agreement is reached between the organization or individual deploying the equipment radio in low-power wide-area networks and organizations and enterprises deploying mobile communication systems in the band 880-915 MHz.
APPENDIX 20
TECHNICAL AND OPERATIONAL CONDITIONS APPLIED TO RADIO DEVICES USED FOR MARINE SAFETY AND RESCUE PURPOSES
(Issued together with the Circular No. 08/2021/TT-BTTTT dated October 14, 2021 of Minister of Information and Communications)
|
Frequency band |
Main emission |
Spurious emission |
Type of radio device |
Other conditions |
|
156.025 ÷ 162.025 MHz (Note 7) |
≤ 7,7 W ERP (12,5 W EIRP) |
According to spurious emission limit 21 |
Automatic Identification System (AIS). |
- Organizations and individuals exploiting and using equipment need to ensure compliance with regulations of law on maritime, inland waterways and other relevant regulations. - Organizations, individuals using device are responsible for setting, providing related identification information and data according to the regulations of the law. - Do not use the device for other purposes that are not permitted by law. - In case an organization or individual no longer needs to use the device, it must turn off the radio transmission and reception feature to limit the possibility of the device transmitting unintentionally on frequencies used for safety assistance purposes, rescue. |
|
161,9625 ÷ 161,9875 MHz; 162,0125 ÷ 162,0375 MHz |
≤ 7,7 W ERP (12,5 W EIRP) |
According to spurious emission limit 22 |
AIS Search and Rescue Radar Transponder (AIS- SART) (Note 8) |
- Organizations and individuals exploiting and using equipment need to ensure compliance with regulations of law on maritime, inland waterways and other relevant regulations. - Do not use the device for other purposes that are not permitted by law. - In case an organization or individual no longer needs to use the device, it must turn off the radio transmission and reception feature to limit the possibility of the device transmitting unintentionally on frequencies used for safety assistance purposes, rescue. |
|
406,0 ÷ 406,1 MHz |
≤ 12,2 W ERP |
According to spurious emission limit 23 |
Emergency Position Indicating Radio Beacon (EPIRB). (Note 8) |
- Organizations and individuals exploiting and using equipment need to ensure compliance with regulations of law on maritime, inland waterways and other relevant regulations. - Organizations, individuals using device are responsible for setting, providing related identification information and data according to the regulations of the law. - Emission method on 121.5MHz frequency: A3X. This frequency band is used for radio navigation purpose supporting for EPIRB device - Do not use the device for other purposes that are not permitted by law. - In case an organization or individual no longer needs to use the device, it must turn off the radio transmission and reception feature to limit the possibility of the device transmitting unintentionally on frequencies used for safety assistance purposes, rescue. |
|
121.5 MHz |
≤ 100 mW ERPEP |
|||
|
406,0 ÷ 406,1 MHz |
≤ 12,2 W ERP |
According to spurious emission limit 23 |
Personal Locator Beacon (PLB) |
- Organizations and individuals exploiting and using equipment need to ensure compliance with regulations of law on maritime, inland waterways and other relevant regulations. - Do not use the device for other purposes that are not permitted by law. - The frequency 121.5 MHz is used for radio positioning purposes for PLB equipment. - In case an organization or individual no longer needs to use the device, it must turn off the radio transmission and reception feature to limit the possibility of the device transmitting unintentionally on frequencies used for safety assistance purposes, rescue. |
|
121.5 MHz |
≤ 100 mW ERPEP |
|||
|
406,0 ÷ 406,1 MHz |
≤ 12,2 W ERP |
According to spurious emission limit 23 |
Emergency Locator Transmitter (ELT) (Note 8) |
- Organizations and individuals exploiting and using equipment need to ensure compliance with regulations of law on maritime, inland waterways and other relevant regulations. - Do not use the device for other purposes that are not permitted by law. - The frequency 121.5 MHz is used for radio positioning purposes for ELT equipment. - In case an organization or individual no longer needs to use the device, it must turn off the radio transmission and reception feature to limit the possibility of the device transmitting unintentionally on frequencies used for safety assistance purposes, rescue. |
|
121.5 MHz |
≤ 100 mW ERPEP |
|||
|
9200 ÷ 9500 MHz |
≥ 400 mW EIRP |
Not applicable |
Search and Rescue Radar Transponder (SART).(Note 8) |
- Organizations and individuals exploiting and using equipment need to ensure compliance with regulations of law on maritime, inland waterways and other relevant regulations. - Do not use the device for other purposes that are not permitted by law. - In case an organization or individual no longer needs to use the device, it must turn off the radio transmission and reception feature to limit the possibility of the device transmitting unintentionally on frequencies used for safety assistance purposes, rescue. |
Note 7: International default operating frequency: AIS1 (161.9625 ÷ 161.9875 MHz), AIS2 (162.0125 ÷ 162.0375 MHz).
Note 8: In case organizations, individuals needs to be granted a radio frequency use licenses for EPIRB, AIS, SART, AIS-SART, ELTequipment, then the procedures for granting radio frequency use licenses shall be carried out in accordance with law
