1 
 General Information on The Draft Amendment of Low-P ower 
Radio-Frequency Devices Technical Regulations  
The Ministry of Transportation and Communications a mended “Table of 
Frequency Allocation of Republic of China” accordin g to Jiao-You-Zi No. 
10650017402 announcement on February 22, 2017 and t he newly added frequency is 
for the use of low-power IoT equipment, low-power r adio beacon in seaside, wireless 
radio frequency identification system and mobile br oadband business. To facilitate the 
market development and satisfy the consumers’ deman d, the amendments of the 
Technical Regulations are according with internatio nal technology standards. The 
amendments are summarized below: 
1.  Add the newly announced frequency band for mobile b roadband business in “Table 
of Frequency Allocation of Republic of China” in th e restricted frequency band. 
(amended 2.7).   
2.  Add 920 MHz to 925 MHz and 926 MHz to 928 MHz frequ ency band for the use of 
IoT equipment and radio beacon in seaside and amend  the frequency band for 
wireless radio frequency identification system (ame nded 4.8). 
 2 
 Comparison Table of The Draft Amendments to Low-Pow er Radio-Frequency Devices Technical Regulations  
Amended Provisions Current Provisions Descriptions 
1.1 Radio frequency (RF) energy: 
Electromagnetic energy at any frequency in the radio spectrum, located in the frequency range between 8.3 kHz and 3 THz 
. 1.1 Radio frequency (RF) energy: 
Electromagnetic energy at any frequency in the radio spectrum, located in the frequency range between 9 kHz and 300 GHz. Comply to the amended of frequency range of Article 5 of Administrative Regulations on 
Radio Waves and Article 4 of Administrative 
Regulations on Radio Waves of Industrial, 
Scientific, Medical Equipment.  
2.7 Additional regulations shall applyexcept for 
this standard.The fundamental frequency of any low-power radio-frequency devices are restricted in any of the operation bands listed below; spurious emissions are permitted in any of frequency band listed below and shall meet the field strength requirement of 2.8: 
            
Frequency 
(MHz)  
0.090 ～0.110 
0.490 ～0.510 
2.172 ～2.198 
3.013 ～3.033 
4.115 ～4.198 
5.670 ～5.690 
6.200 ～6.300 
8.230 ～8.400 
12.265 ～12.600 
13.340 ～13.430 2.7 Additional regulations shall applyexcept for 
this standard.The fundamental frequency of any low-power radio-frequency devices are restricted in any of the operation bands listed below; spurious emissions are permitted in any of frequency band listed below and shall meet the field strength requirement of 2.8: 
        
Frequency 
(MHz)  
0.090 ～0.110 
0.490 ～0.510 
2.172～2.198 
3.013 ～3.033 
4.115 ～4.198 
5.670 ～5.690 
6.200 ～6.300 
8.230 ～8.400 
12.265 ～12.600 The amended restricted frequency band as regulated in “Table of Frequency Allocation of Republic of China” according to Jiao-You-Zi No. 10650017402 announcement issued by Ministry of Transportation and Communications on February 22, 2017. 3 
 14.965 ～15.020 
16.700 ～16.755 
19.965 ～20.020 
25.500 ～25.700 
37.475 ～38.275 
73.500 ～75.400 
108.00 ～138.00 
149.90 ～150.05 
156.70 ～156.90 
162.01 ～167.17 
167.72 ～173.20 
240.00 ～285.00 
322.00 ～335.40 
399.90 ～410.00 
485.00 ～510.00 
608.00 ～614.00 
703.00 ～748.00 
758.00 ～803.00 
825.00 ～915.00 
930.00 ～1240.0 
1300.0 ～1427.0 
1435.0 ～1626.5 
1660.0 ～1785.0  
1805.0 ～1880.0  
1885.0 ～1900.0 
1905.0 ～1985.0 13.340 ～13.430 
14.965 ～15.020 
16.700 ～16.755 
19.965 ～20.020 
25.500 ～25.700 
37.475 ～38.275 
73.500 ～75.400 
108.00 ～138.00 
149.90 ～150.05 
156.70 ～156.90 
162.01 ～167.17 
167.72 ～173.20 
240.00 ～285.00 
322.00 ～335.40 
399.90 ～410.00 
485.00 ～510.00 
608.00 ～614.00  
703.00 ～748.00 
758.00 ～803.00 
825.00 ～915.00 
930.00 ～1240.0 
1300.0 ～1427.0 
1435.0 ～1626.5 
1660.0 ～1770.0 
1805.0 ～1865.0 
1885.0 ～1900.0 4 
 2010.0 ～2025.0 
2110.0 ～2170.0  
2200.0 ～2300.0 
2310.0 ～2390.0 
2483.5 ～2900.0 
3260.0 ～3267.0 
3332.0 ～3339.0 
3345.8 ～3358.0 
3500.0 ～4400.0 
4500.0 ～5250.0 
5350.0 ～5460.0 
7250.0 ～7750.0 
8025.0 ～8500.0 
9000.0 ～9200.0 
9300.0 ～9500.0 
10600 ～12700 
13250 ～13400 
14470 ～14500 
15350 ～16200 
17700 ～21400 
22010 ～23120 
23600 ～24000 
31200 ～31800 
36430 ～36500 
38600 以上  
 1905.0 ～1985.0 
2015.0 ～2025.0 
2125.0 ～2165.0 
2200.0 ～2300.0 
2310.0 ～2390.0 
2483.5 ～2900.0 
3260.0 ～3267.0 
3332.0 ～3339.0 
3345.8 ～3358.0 
3500.0 ～4400.0 
4500.0 ～5250.0 
5350.0 ～5460.0 
7250.0 ～7750.0 
8025.0 ～8500.0 
9000.0 ～9200.0 
9300.0 ～9500.0 
10600 ～12700 
13250 ～13400 
14470 ～14500 
15350 ～16200 
17700 ～21400 
22010 ～23120 
23600 ～24000 
31200 ～31800 
36430 ～36500 
38600 以上  
 5 
 3.1 Frequency bands:1.705 MHz - 10 MHz. 
3.1.1 Type of device: any radiated device.  
3.1.1.1 Fundamental emission: 
(1)If the bandwidth of the emission is less 
than 10% of the center frequency, the field strength shall be less than or equal to 15 microvolts/meter or (the bandwidth of the device in kHz) divided by (the center frequency of the device in MHz) microvolts/meter at a distance of 30 meters, whichever is the higher level. 
(2)If the bandwidth of the emission is 
equal or greater than 10% of the center frequency, the field strength of any emission within the band 1.705-10.0 MHz shall be less than or equal to 100 microvolts/meter at a distance of 30 meters. 
 (3) The bandwidth  of the preceding two 
paragraphs indicates the width between two 
measurement signal points, which are the 
upper and lower sides of the central 
frequency of modulation carrier wave, 
relative to lower 6 dB at the maximum 
power of a modulated carrier.  
(4) The central frequency must not be within 
the band listed in 2.7.  
 
 3.1 Frequency bands:1.705 MHz - 10 MHz. 
3.1.1 Type of device: any radiated device.  
3.1.1.1 Fundamental emission: 
(1)If the bandwidth of the emission is less 
than 10% of the center frequency, the field strength shall be less than or equal to 15 microvolts/meter or (the bandwidth of the device in kHz) divided by (the center frequency of the device in MHz) microvolts/meter at a distance of 30 meters, whichever is the higher level. 
 
(2)If the bandwidth of the emission is 
equal or greater than 10% of the center frequency, the field strength of any emission within the band 1.705-10.0 MHz shall be less than or equal to 100 microvolts/meter at a distance of 30 meters. 
           1.  Specify that the central frequency of the main wave must not be in 2.172 to 2.198 MHz, 3.013 to 3.033 MHz, 4.115 to 4.198 MHz, 5.670 to 5.690 MHz, 6.200 to 6.300 MHz and 8.230 to 8.400 MHz as listed in 2.7 in order to avoid misunderstanding. 
2.  Add the definition of bandwidth in 3.1.1.1 to facilitate interpretation. 
3.  Unify the word usage and delete unnecessary words.  6 
 3.1.1.2 Unwanted emission: The field 
strength of unwanted emissions shall not exceed the general radiated emission limits in Section 2.8. 
3.1.1.3 Field strength is based on 
measurement instrumentation employing an average detector and must meet the peak emissions of Section 5.15.2. 
         3.13 Operation within the band 57 GHz~66 GHz 
 
3.13.1 Type of device: Any type of the 
emission device, but excluding field disturbance sensors not fixed to operate and equipment used on aircrafts or satellites. 
3.13.1.1 Within the 57 GHz~66 GHz band, 
emission levels shall not exceed the following equivalent 3.1.1.2 Unwanted emission: The field 
strength of unwanted emissions shall not exceed the general radiated emission limits in Section 2.8. 
3.1.1.3 Field strength is based on 
measurement instrumentation employing an average detector and must meet the peak emissions of Section 5.15.2. 
Note: 3.1.1.1 The bandwidth indicates the width 
between two measurement signal points, 
which are the upper and lower sides of the 
central frequency of modulation carrier, 
relative to lower 6 dB at the maximum 
power of a modulated carrier.  
  
3.13 Operation within the band 57 GHz~66 GHz  
3.13.1 Type of device: Any type of the 
emission device, but excluding field disturbance sensors not fixed to operate and equipment used on aircrafts or satellites. 
3.13.1.1 Within the 57 GHz~66 GHz band, 
emission levels shall not exceed the following equivalent 7 
 isotropically radiated power (EIRP): 
(1)For fixed field disturbance sensors that 
occupy 500 MHz or less of bandwidth and that are contained wholly within the frequency band 61.0 GHz~61.5 GHz: (A)The average power of any emission, 
measured during the transmit interval, shall be less than or equal to 40 dBm, and the peak power of any emission shall be less than or equal to 43 dBm. 
(B)The average power of any emission 
in the 57 GHz~61.0 GHz and 61.5 GHz~66.0 GHz bands shall be less than or equal to 10 dBm, and the peak power of any emission shall be less than or equal to 13 dBm. 
(2)For fixed field disturbance sensors 
other than those operating under the provisions of paragraph (1) of this section, the peak transmitter conducted output power shall be less than or equal to -10 dBm and the peak EIRP level shall be less than or equal to 10 dBm 
(3)For products other than fixed field 
disturbance sensors, the EIRP shall meet the regulations below during the transmit interval: isotropically radiated power (EIRP): 
(1)For fixed field disturbance sensors that 
occupy 500 MHz or less of bandwidth and that are contained wholly within the frequency band 61.0 GHz~61.5 GHz: (A)The average power of any emission, 
measured during the transmit interval, shall be less than or equal to 40 dBm, and the peak power of any emission shall be less than or equal to 43 dBm. 
(B)The average power of any emission 
in the 57 GHz~61.0 GHz and 61.5 GHz~66.0 GHz bands shall be less than or equal to 10 dBm, and the peak power of any emission shall be less than or equal to 13 dBm. 
(2)For fixed field disturbance sensors 
other than those operating under the provisions of paragraph (1) of this section, the peak transmitter conducted output power shall be less than or equal to -10 dBm and the peak EIRP level shall be less than or equal to 10 dBm 
(3)For products other than fixed field 
disturbance sensors, the EIRP shall meet the regulations below during the transmit interval: 8 
 (A)For transmitters located outdoors, 
the average power of any emission shall be less than or equal to 82 dBm, and the peak power shall be less than or equal to 85 dBm when the antenna gain is greater than 51 dBi; the average power of any emission shall be less than or equal to 82-2×(51-G) dBm, and the peak power shall be less than or equal to 85-2×(51-G) dBm when the antenna gain is greater than 51 dBi. 
(B)Except for the provisions of (A) of 
this part, the average power of any emission shall be less than or equal to 40 dBm, and the peak power of any emission shall be less than or equal to 43 dBm 
3.13.1.2  Limits on spurious emissions: 
(1)The power density of any emissions 
outside the 57 GHz~66 GHz band shall consist solely of spurious emissions. 
(2)Radiated emissions below 40 GHz 
shall meet the regulations in Section 2.8 of this part. 
(3)Between 40 GHz and 200 GHz, the 
level of these emissions shall be less than or equal to 90 pW/cm 
2 at a 
distance of 3 meters. (A)For transmitters located outdoors, 
the average power of any emission shall be less than or equal to 82 dBm, and the peak power shall be less than or equal to 85 dBm when the antenna gain is greater than 51 dBi; the average power of any emission shall be less than or equal to 82-2×(51-G) dBm, and the peak power shall be less than or equal to 85-2×(51-G) dBm when the antenna gain is greater than 51 dBi. 
(B)Except for the provisions of (A) of 
this part, the average power of any emission shall be less than or equal to 40 dBm, and the peak power of any emission shall be less than or equal to 43 dBm 
3.13.1.2 Limits on spurious emissions: 
(1)The power density of any emissions 
outside the 57 GHz~66 GHz band shall consist solely of spurious emissions. 
(2)Radiated emissions below 40 GHz shall 
meet the regulations in Section 2.8 of this part. 
(3)Between 40 GHz and 200 GHz, the 
level of these emissions shall be less than or equal to 90 pW/cm 
2 at a distance 
of 3 meters. 9 
 3.13.1.3   Limits on the total peak 
transmitter output power. 
(1)For the transmitters with an emission 
bandwidth of greater than or equal to 100 MHz, the total peak transmitter output power shall be less than or equal to 500mW. 
(2)Transmitters with an emission 
bandwidth less than 100 MHz must limit their total peak transmitter output power less than or equal to 500 mW times their emission bandwidth (MHz) divided by 100 MHz. 
(3)For the purposes of this paragraph, the 
6 dB emission bandwidth is defined as the instantaneous frequency range occupied by a steady state radiated signal with modulation, outside which the radiated power spectral density shall be less than the maximum radiated power spectral density in the band, as measured with a 100 kHz resolution bandwidth spectrum analyzer. The center frequency must be stationary during the measurement interval, even if not stationary during normal operation (e.g. for frequency hopping devices). 
(4)Peak transmitter output power shall be 
measured with an RF detector that has a 3.13.1.3Limits on the total peak transmitter 
output power. 
(1)For the transmitters with an emission 
bandwidth of greater than or equal to 100 MHz, the total peak transmitter output power shall be less than or equal to 500mW. 
(2)Transmitters with an emission 
bandwidth less than 100 MHz must limit their total peak transmitter output power less than or equal to 500 mW times their emission bandwidth (MHz) divided by 100 MHz. 
(3)For the purposes of this paragraph, the 
6 dB emission bandwidth is defined as the instantaneous frequency range occupied by a steady state radiated signal with modulation, outside which the radiated power spectral density shall be less than the maximum radiated power spectral density in the band, as measured with a 100 kHz resolution bandwidth spectrum analyzer. The center frequency must be stationary during the measurement interval, even if not stationary during normal operation (e.g. for frequency hopping devices). 
(4)Peak transmitter output power shall be 
measured with an RF detector that has a detection bandwidth that encompasses 10 
 detection bandwidth that encompasses the 57 GHz~66 GHz band and that has a video bandwidth of at least 10 MHz, or using an equivalent measurement method. 
 3.13.1.4Frequency stability: This 
frequency stability shall be maintained for a temperature variation of -20 ℃~50 ℃ at normal 
supply voltage, and for a variation in the primary supply voltage within ±15% of the rated supply voltage at a temperature of 20°C. The emission frequency shall be contained within the 57 GHz~66 GHz band. For battery operated equipment, the equipment tests shall be performed using new battery, and the requirements of Section 5.18 must be met. the 57 GHz~66 GHz band and that has a video bandwidth of at least 10 MHz, or using an equivalent measurement method. 
 3.13.1.4Frequency stability: This 
frequency stability shall be maintained for a temperature variation of -20 ℃~50 ℃ at normal 
supply voltage, and for a variation in the primary supply voltage within ±15% of the rated supply voltage at a temperature of 20°C. The emission frequency shall be contained within the 57 GHz~66 GHz band. For battery operated equipment, the equipment tests shall be performed using new battery, and the requirements of Section 5.18 must be met. 11 
 4.4  Citizens Band Radio Service (CBRS) 
4.4.1 Transmitter: 
    4.4.1.1 Frequency bands: from 26.965 
MHz~27.405 MHz in total 40 channels (as table below). The channel 9 shall be specially marked for emergency call only. 
 
Channel Frequency 
(MHz) Channel Frequency 
(MHz) 
1 26.965 21 27.215 
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 29 27.295 
10 27.075 30 27.305 
11 27.085 31 27.315 
12 27.105 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 4.4 Citizens Band Radio Service (CBRS) 
4.4.1 Transmitter: 
4.4.1.1 Frequency bands: from 26.965 
MHz~27.405 MHz in total 40 channels (as table below). The channel 9 shall be specially marked for emergency call only. 
Channel Frequency 
(MHz) Channel Frequency 
(MHz) 
1 26.965 21 27.215 
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 29 27.295 
10 27.075 30 27.305 
11 27.085 31 27.315 
12 27.105 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 1.  Amend the text to comply with legal terms. 
2.  Amend “4.6.10 For the measurement method, please see ETIS EN300 422-1” to 4.6.2.3,in order to avoid confusions of the scope of application. 
3.  Add 920 MHz to 925 MHz for low-power IoT devices and 926 MHz to 928 MHz for radio beacon in seaside according to the Jiao-You-Zi No. 10650017402 announcement issued by Ministry of Transportation and Communications on February 22, 2017. 
4.  Comply with the 
 announcement 
mentioned previously, amend the operation frequency of radio-frequency identification equipment to 920 MHz to 928 MHz. 12 
 18 27.175 38 27.385 
19 27.185 39 27.395 
20 27.205 40 27.405 
 
4.4.1.2 Modulation technique: 
(1)AM (A3E): amplitude modulation 
below ±100 %. 
(2)FM (F3E): peak frequency deviation 
within ±2.5 kHz. 
4.4.1.3 Bandwidth: 
AM (A3E): 8 kHz. FM (F3E): 10 kHz. 
4.4.1.4 The frequency tolerance: within 
0.005 %. This frequency tolerance shall be maintained for a temperature variation of -20 ℃~50 
℃ at normal supply voltage, and for 
a variation in the primary supply voltage within ±15% of the rated supply voltage at a temperature of 20 °C. For battery operated equipment, the equipment tests shall be performed using new battery. In the meantime, it shall comply with the requirements set forth in Section 5.18. 17 27.165 37 27.375 
18 27.175 38 27.385 
19 27.185 39 27.395 
20 27.205 40 27.405 
 
4.4.1.2 Modulation technique: 
(1)AM (A3E): amplitude modulation 
below ±100 %. 
(2)FM (F3E): peak frequency deviation 
within ±2.5 kHz. 
4.4.1.3 Bandwidth: 
AM (A3E): 8 kHz. FM (F3E): 10 kHz. 
4.4.1.4 The frequency tolerance: within 
0.005 %. This frequency tolerance shall be maintained for a temperature variation of -20 ℃~50 
℃ at normal supply voltage, and for 
a variation in the primary supply voltage within ±15% of the rated supply voltage at a temperature of 20 °C. For battery operated equipment, the equipment tests shall be performed using new battery. In the meantime, it shall comply with the requirements set forth in Section 13 
 4.4.1.5 Effective radiated power (ERP): 
AM (A3E): within 4 W. FM (F3E): within 5 W. 
4.4.1.6 Power in the adjacent channels: 
(1)AM (A3E): the same as 4.4.1.7(1). (2)FM (F3E): less than or equal to 20 nW 
under normal testing conditions. 
4.4.1.7  Unwanted emission: 
(1)AM (A3E): 
(A)Emissions ±4 kHz~±8 kHz from the 
channel center frequency : minimum 25 dB. 
(B)Emissions ±8 kHz~±20 kHz from 
the channel center frequency : minimum 35 dB. 
(C)Emissions more than ±20 kHz from 
the channel center frequency: at l minimum 53 + 10 log (maximum output power) dB. 
(2)FM (F3E): 
(A)When the transmitter is operating, 
the spurious power in the following frequency bands shall be less than or equal to 4 nW (ERP): 41 MHz~68 MHz, 87.5 MHz~118 MHz, 162  MHz~230 MHz and 5.18. 
4.4.1.5 Effective radiated power (ERP): 
AM (A3E): within 4 W. FM (F3E): within 5 W. 
4.4.1.6 Power in the adjacent channels: 
(1)AM (A3E): the same as 4.4.1.7(1). (2)FM (F3E): less than or equal to 20 nW 
under normal testing conditions. 
4.8.1.4  Unwanted emission: 
(1)AM (A3E): 
(A)Emissions ±4 kHz~±8 kHz from the 
channel center frequency : minimum 25 dB. 
(B)Emissions ±8 kHz~±20 kHz from 
the channel center frequency : minimum 35 dB. 
(C)Emissions more than ±20 kHz from 
the channel center frequency: at l minimum 53 + 10 log (maximum output power) dB. 
(2)FM (F3E): 
(A)When the transmitter is operating, 
the spurious power in the following frequency bands shall be less than or equal to 4 nW (ERP): 41 MHz~68 MHz, 87.5 MHz~118 MHz, 162  14 
 470 MHz~862 MHz. 
(B)In addition to those specified in (A) 
above, the ERP of spurious power in the frequencies from 25 MHz~1 GHz shall be less than or equal to 0.25 µW (ERP). 
(C)In addition to those specified in (A) 
and (B) above, the ERP of spurious power in the frequencies from 1 GHz~2 GHz shall be less than or equal to 1 uW (ERP). 
(D)When the transmitter is in standby, 
the ERP of spurious power in the frequencies from 25 MHz~1 GHz shall be less than or equal to 2 nW (ERP), and in the frequencies from 1 GHz~2 GHz shall be less than or equal to 20 nW (ERP). 
4.4.2 The receiver: 
4.4.2.1 Unwanted emission: The field 
strength of unwanted emissions shall not exceed the general radiated emission limits in Section 2.8. 
 4.6 Low-Power Wireless Microphone and 
Wireless Earphone: A low power wireless microphone is used for transmission of voice or music by radio waves to remote receiving MHz~230 MHz and 470 MHz~862 MHz. 
(B)In addition to those specified in (A) 
above, the ERP of spurious power in the frequencies from 25 MHz~1 GHz shall be less than or equal to 0.25 µW (ERP). 
(C)In addition to those specified in (A) 
and (B) above, the ERP of spurious power in the frequencies from 1 GHz~2 GHz shall be less than or equal to 1 uW (ERP). 
(D)When the transmitter is in standby, 
the ERP of spurious power in the frequencies from 25 MHz~1 GHz shall be less than or equal to 2 nW (ERP), and in the frequencies from 1 GHz~2 GHz shall be less than or equal to 20 nW (ERP). 
4.4.2 The receiver: 
4.4.2.1 Unwanted emission: The field 
strength of unwanted emissions shall not exceed the general radiated emission limits in Section 2.8. 
  
4.6 Low-Power Wireless Microphone and 15 
 equipments. 
4.6.1 Frequency bands: 227.1 MHz~227.4 
MHz, 229.4 MHz~230.0 MHz, 231.0 MHz~231.9 MHz, 510 MHz~530 MHz, 748 MHz~758 MHz, 803 MHz~806 MHz, 1790 MHz~1805 MHz 
4.6.2 Necessary bandwidth: 
4.6.2.1 The necessary bandwidth for the 
system with the operating frequency (fc) less than 1 GHz shall be less than or equal to 200 kHz, and shall comply with the mask standards in the following two tables. 
Frequency 
deviation  
Δf Analog system  
Limit  
(dBc)  RBW  VBW  Detector  Trace  Span  
± (0 ≤ Δf ≤ 
0.35B)  0 ~ -20  
 (Note 1)  1 
kHz  1 
kHz  RMS  Max 
Hold  fc ± 1 
MHz  
± (0.35B ≤ Δf 
≤ 0.5B)  -20 ~ -60 
(Note 1)  1 
kHz  1 
kHz  RMS  Max 
Hold  fc ± 1 
MHz  
± (0.5B ≤ Δf ≤ 
B)  -60 ~ -80 
(Note 1)  1 
kHz  1 
kHz  RMS  Max 
Hold  fc ± 1 
MHz  
± (B ≤ Δf ≤ 
1MHz)  -80 ~ -90 
(Note1)  1 
kHz  1 
kHz  RMS  Average  fc ± 1 
MHz  
Note: 1. For the limits calculated by linear interp olations, please see Figure 1.  
2. The tighter limit applies at the band overlap. 3. B indicates the bandwidth stated by the supplier .  
  
 
 Wireless Earphone: A low power wireless microphone is used for transmission of voice or music by radio waves to remote receiving equipments. 
4.6.1 Frequency bands: 227.1 MHz~227.4 
MHz, 229.4 MHz~230.0 MHz, 231.0 MHz~231.9 MHz, 510 MHz~530 MHz, 748 MHz~758 MHz, 803 MHz~806 MHz, 1790 MHz~1805 MHz 
4.6.2 Necessary bandwidth: 
4.6.2.1 The necessary bandwidth for the 
system with the operating frequency (fc) less than 1 GHz shall be less than or equal to 200 kHz, and shall comply with the mask standards in the following two tables. 
Frequency 
deviation  
Δf Analog system  
Limit  
(dBc)  RBW  VBW  Detector  Trace  Span  
± (0 ≤ Δf ≤ 
0.35B)  0 ~ -20  
 (Note 1)  1 
kHz  1 
kHz  RMS  Max 
Hold  fc ± 1 
MHz  
± (0.35B ≤ Δf 
≤ 0.5B)  -20 ~ -60 
(Note 1)  1 
kHz  1 
kHz  RMS  Max 
Hold  fc ± 1 
MHz  
± (0.5B ≤ Δf ≤ 
B)  -60 ~ -80 
(Note 1)  1 
kHz  1 
kHz  RMS  Max 
Hold  fc ± 1 
MHz  
± (B ≤ Δf ≤ 
1MHz)  -80 ~ -90 
(Note1)  1 
kHz  1 
kHz  RMS  Average  fc ± 1 
MHz  
Note: 1. For the limits calculated by linear interp olations, please see Figure 1.  
2. The tighter limit applies at the band overlap. 3. B indicates the bandwidth stated by the supplier .  
 16 
 
 
            Figure 1      
Frequency 
deviation  
Δf Digital system (<1 GHz)  
Limit  
(dBc)  RBW  VBW  Detector  Trace  Span  Sweep 
Time  
± (0 ≤ Δf 
< 0.5B)  0 1 
kHz  1 
kHz  RMS  Max 
Hold  ≥ 5 x 
B ≥ 2 
seconds  
± (0.5B ≤ 
Δf ≤ 
1.75B)  -30 ~ 
-80  
(Note 
1)  1 
kHz  1 
kHz  RMS  Max 
Hold  ≥ 5 x 
B ≥ 2 
seconds  
± (1.75B 
≤ Δf ≤ 
5B)  -80 ~ 
-90  
(Note 
1)  1 
kHz  1 
kHz  RMS  Average  ± 
(1.75B 
≤ Δf ≤ 
5B)  2 
seconds  
Per 200 
kHz  
Note: 1. For the limits calculated by linear interp olations, please see Figure 2.  
2. The tighter limit applies at the band overlap. 3. B indicates the bandwidth stated by the supplier .  
 
             Figure 1 
Frequency 
deviation  
Δf Digital system (<1 GHz)  
Limit  
(dBc)  RBW  VBW  Detector  Trace  Span  Sweep 
Time  
± (0 ≤ Δf 
< 0.5B)  0 1 
kHz  1 
kHz  RMS  Max 
Hold  ≥ 5 x 
B ≥ 2 
seconds  
± (0.5B ≤ 
Δf ≤ 
1.75B)  -30 ~ 
-80  
(Note 
1)  1 
kHz  1 
kHz  RMS  Max 
Hold  ≥ 5 x 
B ≥ 2 
seconds  
± (1.75B 
≤ Δf ≤ 
5B)  -80 ~ 
-90  
(Note 
1)  1 
kHz  1 
kHz  RMS  Average  ± 
(1.75B 
≤ Δf ≤ 
5B)  2 
seconds  
Per 200 
kHz  
Note: 1. For the limits calculated by linear interp olations, please see Figure 2.  
2. The tighter limit applies at the band overlap. 3. B indicates the bandwidth stated by the supplier .  17 
 
 
Figure 2 
4.6.2.2 The necessary bandwidth for the 
system with the operating frequency (fc) greater than 1 GHz shall be less than or equal to 600 kHz, and comply with the mask standard in the table below. 
  
Frequency 
deviation  
Δf Digital system (>1 GHz) 
Limit 
(dBc)  RBW  VBW  Detector  Trace Span Sweep 
Time 
± (0 ≤ Δf 
< 0.5B) 0 1 
kHz 1 kHz  RMS Max 
Hold ≥ 5 x B  ≥ 2 
seconds  
± (0.5B ≤ 
Δf ≤ B) -40 ~ 
-60 
(Note 
1) 1 
kHz 1 kHz  RMS Max 
Hold ≥ 5 x B  ≥ 2 
seconds  
± (B ≤ Δf 
≤ 1MHz) -60 1 
kHz 1 kHz  RMS Average  ± (B ≤ 
Δf ≤ 
1MHz)  2 
seconds  
per 200 
kHz 
Note: 1. For the limits calculated by linear interp olations, please see Figure 3. 
2. The tighter limit applies at the band overlap. 3. B indicates the bandwidth stated by the supplier .  
 
Figure 2 
4.6.2.2 The necessary bandwidth for the 
system with the operating frequency (fc) greater than 1 GHz shall be less than or equal to 600 kHz, and comply with the mask standard in the table below. 
  
Frequency 
deviation  
Δf Digital system (>1 GHz) 
Limit 
(dBc)  RBW  VBW  Detector  Trace Span Sweep 
Time 
± (0 ≤ Δf 
< 0.5B) 0 1 
kHz 1 kHz  RMS Max 
Hold ≥ 5 x B  ≥ 2 
seconds  
± (0.5B ≤ 
Δf ≤ B) -40 ~ 
-60 
(Note 
1) 1 
kHz 1 kHz  RMS Max 
Hold ≥ 5 x B  ≥ 2 
seconds  
± (B ≤ Δf 
≤ 1MHz) -60 1 
kHz 1 kHz  RMS Average  ± (B ≤ 
Δf ≤ 
1MHz)  2 
seconds  
per 200 
kHz 
Note: 1. For the limits calculated by linear interp olations, please see Figure 3. 
2. The tighter limit applies at the band overlap. 3. B indicates the bandwidth stated by the supplier .  18 
 
 
Figure 3 
4.6.2.3 For the measurement method, 
please see ETSI EN300 422-1.  
 
4.6.3 Fundamental emission (ERP): 
4.6.3.1 Operation within the bands 227.1 
MHz~227.4 MHz, 229.4 MHz~230.0 MHz, 231.0 MHz~231.9 MHz: 
Channel Bandwidth ERP limit 
No more than 50kHz No more than 10mW. 
Below 200kHz, above 50kHz (exclusive) No more than 5mW 
4.6.3.2 Operation within the 510.0 
MHz~530.0 MHz band: below 50 mW. 
4.6.3.3 Operation within the 748.0 
MHz~758.0 MHz band: below 10 mW. 
 
Figure 3 
   4.6.3 Fundamental emission (ERP): 
4.6.3.1 Operation within the bands 227.1 
MHz~227.4 MHz, 229.4 MHz~230.0 MHz, 231.0 MHz~231.9 MHz: 
Channel Bandwidth ERP limit 
No more than 50kHz No more than 10mW. 
Below 200kHz, above 50kHz (exclusive) No more than 5mW 
4.6.3.2 Operation within the 510.0 
MHz~530.0 MHz band: below 50 mW. 
4.6.3.3 Operation within the 748.0 
MHz~758.0 MHz band: below 10 19 
 4.6.3.4 Operation within the 803.0 
MHz~806.0 MHz band: below 10 mW. 
4.6.3.5 Operation within the 1790.0 
MHz~1805.0 MHz band: below 10 mW. 
4.6.3.6 The carrier power must be operated 
according to the table below when measuring the channel width. 
Carrier power measurement 
Central emission 
frequency RBW  VBW  Detector  Trace Span Sweep 
Time 
fc 5 x B  5 x B  RMS Average  Zero 
Span ≥ 2 
seconds 
Remark: B represents the emission bandwidth. 
4.6.4 Frequency deviation: less than or equal 
to ±75 kHz, solely applied to analog system. 
4.6.5 Frequency stability: 
4.6.5.1 Operating frequency less than 1 
GHz: 20 ppm 
4.6.5.2 Operating frequency greater than 1 
GHz: 15 ppm 
4.6.6 Spurious emission (ERP): mW. 
4.6.3.4 Operation within the 803.0 
MHz~806.0 MHz band: below 10 mW. 
4.6.3.5 Operation within the 1790.0 
MHz~1805.0 MHz band: below 10 mW. 
4.6.3.6 The carrier power must be operated 
according to the table below when measuring the channel width. 
Carrier power measurement 
Central emission 
frequency RBW  VBW  Detector  Trace Span Sweep 
Time 
fc 5 x B  5 x B  RMS Average  Zero 
Span ≥ 2 
seconds 
Remark: B represents the emission bandwidth. 
4.6.4 Frequency deviation: less than or equal 
to ±75 kHz, solely applied to analog system. 
4.6.5 Frequency stability: 
4.6.5.1 Operating frequency less than 1 
GHz: 20 ppm 
4.6.5.2 Operating frequency greater than 1 
GHz: 15 ppm 
4.6.6 Spurious emission (ERP): 
   20 
      
4.6.7 Spurious emission of receiver (ERP): 
below 2 nW (inclusive). 
4.6.8 The antenna attached to transmitter shall 
be an integral structure. 
4.6.9 The frequency stability shall be 
maintained over a temperature variation of -10 ℃~45 ℃ at normal supply 
voltage, and for a variation in the primary supply voltage within ±15 % of the rated supply voltage at a temperature of 20 °C. For battery operated equipment, the equipment tests shall be performed using new battery. In the meantime, it shall conform with the requirement of Section 5.18. 
    4.8 Radio Frequency Identification (RFID), 
radio beacon in seaside, and other IoT  Frequency 
 47 MHz~74 MHz,  
87.5 MHz~137 MHz, 
174 MHz~230 MHz,  
470 MHz~862 MHz  < 1 GHz ＞1 GHz  
Operating state  Below 4 nW Below 250 nW Below 1 uW  
Standby state  Below 2 nW Below 2 nW  Below 20 nW  
     
4.6.7 
Spurious emission of receiver (ERP): below 2 nW (inclusive). 
4.6.8 The antenna attached to transmitter shall 
be an integral structure. 
4.6.9 The frequency stability shall be 
maintained over a temperature variation of -10 ℃~45 ℃ at normal supply 
voltage, and for a variation in the primary supply voltage within ±15 % of the rated supply voltage at a temperature of 20 °C. For battery operated equipment, the equipment tests shall be performed using new battery. In the meantime, it shall conform with the requirement of Section 5.18. 
4.6.10 For the measurement method, please 
see ETSI EN300 422-1.  
 
4.8 Radio Frequency Identification (RFID) 
devices operating in UHF band 
4.8.1 Note: Operation in the 922 MHz~928  Frequency 
 47 MHz~74 MHz,  
87.5 MHz~137 MHz, 
174 MHz~230 MHz,  
470 MHz~862 MHz  < 1 GHz ＞1 GHz  
Operating state Below 4 nW Below 250 nW Below 1 uW  
Standby state  Below 2 nW Below 2 nW  Below 20 nW 21 
 devices.    
 4.8.1 Adopted frequency hopping system or 
digital modulation technique devices, excluding passive tag devices.  
 
 4.8.1.1 Use Frequency:  
 (1) Radio frequency identification 
(RFID) devices: 920 MHz to 928 MHz 。 
(2) Radio beacon in seasides: 926 MHz to 
928 MHz 。 
(3) Other IoT devices: 920 MHz to 925 
MHz 。 
4.8.1.2 Restrictions to power efficiency:  
(1) Installed areas and the maximum peak 
output power limit except the radio 
beacon in seaside  
(A)For devices installed indoor or 
specific area: the maximum peak output power limit up to 1 W (inclusive). 
(B)For devices installed outdoor: the 
maximum peak output power limit up to 0.5 W (inclusive). 
(C)As aforementioned in paragraph (A), 
“specific area” is specified to particular, closed and restricted fields with management (for both indoor and outdoor). MHz band under the provisions of this Section is restricted to the RFID devices empolying frequency hopping or digitally modulated techniques systems. Passive tag devices are not subjected to the section 4.8. 
  
4.8.1.1  Power limit: 
(1)Installed areas and the maximum peak 
output power limit: (A)For devices installed indoor or 
specific area: the maximum peak output power limit up to 1 W (inclusive). 
(B)For devices installed outdoor: the 
maximum peak output power limit up to 0.5 W (inclusive). 
(C)As aforementioned in paragraph (A), 
“specific area” is specified to particular, closed and restricted fields with management (for both indoor and outdoor). 
   22 
  (2) The maximum peak output power of 
radio beacon in seaside limit up to 0.5 
W (inclusive).  
(3)  If transmitting antennas of directional 
gain greater than 6 dBi are used, the maximum conducted output power from the intentional radiator shall be reduced by the amount in dB that exceeds 6 dBi. 
4.8.1.3
 The antenna specification is not 
subject to the requirement of Section 2.2. 
4.8.1.4
 Radiated emission limits: 
In any 100 kHz bandwidth outside the frequency band in which the spread spectrum intentional radiator is operating, the radio frequency power shall be attenuated at least 20 dB and the measured RMS shall be 30 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement. In addition, for radiated emissions that fall under Section 2.7 the restricted bands must also comply with the radiated (2)If transmitting antennas of directional 
gain greater than 6 dBi are used, the maximum conducted output power from the intentional radiator shall be reduced by the amount in dB that exceeds 6 dBi. 
 
 
4.8.1.2  The antenna specification is not subject to the requirement of Section 2.2. 
4.8.1.3  Radiated emission limits: 
In any 100 kHz bandwidth outside the frequency band in which the spread spectrum intentional radiator is operating, the radio frequency power shall be attenuated at least 20 dB and the measured RMS shall be 30 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement. In addition, for radiated emissions that fall under Section 2.7 the restricted bands must also comply with the radiated emission limit specified in Section 2.8. 
4.8.1.4  Other limits: 23 
 emission limit specified in Section 2.8. 
4.8.1.5 Other limits: 
(1)Frequency hopping systems: 
(A)Frequency hopping systems shall 
have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. 
(B)Hopping channels and 20 dB 
bandwidth limits: If the 20 dB bandwidth of the hopping channel is less than or equal to 250 kHz, the system shall use at least 12 hopping frequencies. If the 20 dB bandwidth of the hopping channel is greater than 250 kHz, the system shall use at least 6 hopping frequencies. The maximum allowed 20 dB bandwidth of the hopping channel is 500 kHz. 
X＝ used frequency band （MHz ）/26*50, (1)Frequency hopping systems: 
(A)Frequency hopping systems shall 
have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. 
(B)Hopping channels and 20 dB 
bandwidth limits: If the 20 dB bandwidth of the hopping channel is less than or equal to 250 kHz, the system shall use at least 12 hopping frequencies. If the 20 dB bandwidth of the hopping channel is greater than 250 kHz, the system shall use at least 6 hopping frequencies. The maximum allowed 20 dB bandwidth of the hopping channel is 500 kHz. 
    24 
 and adopted unconditional carry law to 
integer; besides, X ≧10  
(C)Frequency hopping systems, the 
average time of occupancy on any frequency each times shall be less than or equal 0.4 seconds within a time period in seconds equal to the number of hopping channels limit employed multiplied by 0.4. 
(2)Digital modulation techniques system: 
(A)For digitally modulated systems, the 
minimum 6 dB bandwidth shall be at least 500 kHz. 
(B)The power spectral density from the 
transmitter to the antenna in any 3 kHz bandwidth of the frequency band shall be less than or equal to 8 dBm. 
(3)The hybrid system: The hybrid systems 
employ a combination of both frequency hopping and digital modulation techniques. (A)The frequency hopping operation of 
the hybrid system, with the direct sequence operation turned off, shall have an average time of occupancy on any frequency each times shall be less than or equal 0.4 seconds (C)Frequency hopping systems, the 
average time of occupancy on any frequency each times shall be less than or equal 0.4 seconds within a time period in seconds equal to the number of hopping channels limit employed multiplied by 0.4. 
(2)Digital modulation techniques system: 
(A)For digitally modulated systems, the 
minimum 6 dB bandwidth shall be at least 500 kHz. 
(B)The power spectral density from the 
transmitter to the antenna in any 3 kHz bandwidth of the frequency band shall be less than or equal to 8 dBm. 
(3)The hybrid system: The hybrid systems 
employ a combination of both frequency hopping and digital modulation techniques. (A)The frequency hopping operation of 
the hybrid system, with the direct sequence operation turned off, shall have an average time of occupancy on any frequency each times shall be less than or equal 0.4 seconds within a time period in seconds equal to the number of hopping channels 25 
 within a time period in seconds equal to the number of hopping channels employed multiplied by 0.4. 
(B)The digital modulation operation of 
the hybrid system, with the frequency hopping turned off, shall comply with the power spectrum density requirements of those specified in (B) of Digital modulation techniques system of Section 2 Other limits in this section 4.8.1.4. 
(4)Frequency hopping spread spectrum 
systems are not required to employ all available hopping channels during each transmission. However, the system, consisting of both the transmitter and the receiver, must be designed to comply with all of the regulations in section 4.8.1 should the transmitter be presented with a continuous data (or information) stream. In addition, a system employing short transmission bursts must comply with the definition of a frequency hopping system and must distribute its transmissions over the minimum number of hopping channels specified in section 4.8.1. . 
(5)The incorporation of intelligence employed multiplied by 0.4. 
(B)The digital modulation operation of 
the hybrid system, with the frequency hopping turned off, shall comply with the power spectrum density requirements of those specified in (B) of Digital modulation techniques system of Section 2 Other limits in this section 4.8.1.4. 
(4)Frequency hopping spread spectrum 
systems are not required to employ all available hopping channels during each transmission. However, the system, consisting of both the transmitter and the receiver, must be designed to comply with all of the regulations in section 4.8.1 should the transmitter be presented with a continuous data (or information) stream. In addition, a system employing short transmission bursts must comply with the definition of a frequency hopping system and must distribute its transmissions over the minimum number of hopping channels specified in section 4.8.1. . 
(5)The incorporation of intelligence within 
a frequency hopping spread spectrum system that permits the system to recognize other users within the 26 
 within a frequency hopping spread spectrum system that permits the system to recognize other users within the spectrum band so that it individually and independently chooses and adapts its hop sets to avoid hopping on occupied channels shall be permitted. The coordination of frequency hopping systems in any other manner for the express purpose of avoiding the simultaneous occupancy of individual hopping frequencies by multiple transmitters is not permitted. 
4.8.2  Any transmission device. 
4.8.2.1 Use frequency: same as 4.8.1.1.
 
4.8.2.2  Radiated emissions limits: All field 
strength limits are specified at a distance of 3 meters. The field strength of fundamental and harmonic emissions shall comply with the limits shown in the table below. Emissions radiated outside of the specified frequency bands, except for harmonics, shall be attenuated by at least 50dB below the level of the fundamental or to the general radiated emission limits in Section 2.8, whichever is the lesser attenuation.  spectrum band so that it individually and independently chooses and adapts its hop sets to avoid hopping on occupied channels shall be permitted. The coordination of frequency hopping systems in any other manner for the express purpose of avoiding the simultaneous occupancy of individual hopping frequencies by multiple transmitters is not permitted. 
 
4.8.2 Type of device: any radiated devices 
except for the frequency hopping systems 
of described in Section 4.8.1.  
4.8.2.1Frequency bands: 922 MHz~928 
MHz 
4.8.2.2 Radiated emissions limits: All field 
strength limits are specified at a distance of 3 meters. The field strength of fundamental and harmonic emissions shall comply with the limits shown in the table below. Emissions radiated outside of the specified frequency bands, except for harmonics, shall be attenuated by at least 50dB below the level of the fundamental or to the general radiated emission limits in Section 2.8, whichever is the lesser attenuation.  27 
 Field Strength of Fundamental 
(mv/m) Field Strength of Harmonics 
Emission ( µv/m) 
50 500 
4.8.2.3 The emission limits are based on 
measurement instrumentation employing an average detector. The provisions in Section 5.15.2 for limiting peak emissions shall apply. 
 Fundamental Frequency 
(MHz) Field Strength of Fundamental 
(mv/m) Field Strength of Harmonics 
Emission ( µv/m) 
922-928 50 500 
4.8.2.3 The emission limits are based on 
measurement instrumentation employing an average detector. The provisions in Section 5.15.2 for limiting peak emissions shall apply.