Technical Specifications of the 
Telecommunications     IS2050 
Inspection Requirements   Date: 12 March  2018 
 
 
 
 
 
 
Technical Specifications for Base Station Radio 
Frequency Equipment of Mobile Broadband Business  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
National Communications Commission (NCC)  
12 March  2018  1 Technical Specifications for Base Station Radio Frequency 
Equipment of Mobile Broadband Business  
 
1. Legal sources  
The specifications are promulgated pursuant to Item 1, Article 50 of Telecommunications Act.  
2. Scope  
This specifications are applicable to the certification of the frequency bands for mobile broadband services 
such as the frequency equipment of Base Stations, Repeaters, Micro Base Stations, Pico Cells and Femto 
Cells.  Based on multiplexing properties, they can be classified as frequency division duplex (FDD) and 
time division duplex (TDD) with relevant frequency sections are identified as below:  
2.1 Frequency Division Duplex (FDD): 700 MHz (uplink 703 MHz -748 MHz \ downlink 758 MHz -803 
MHz), 900 MHz (uplink 885 MHz -915 MHz \downlink 930 MHz -960 MHz), 1800 MHz (uplink 1710 
MHz -1785 MHz \downlink 1805 MHz -1880 MHz), 2100 MHz (uplink 1920 MHz -1980 MHz \downlink 
2110 MHz -2170 MHz), 2500 MHz and 2600 MHz (uplink 2500 MHz -2570 MHz \downlink 2620 MHz -
2690 MHz) bands.  
2.2 Time Division Duplex(TDD):  2500 MHz and 2600 MHz bands (2500 MHz -2570 MHz, 2570 MHz -
2620 MHz and 2620 MHz -2690 MHz).  
3. Technical standard  
The specifications are promulgated based on the Chinese  National  Standards CNS14336 -1, CNS13438 and 
other international technical standards as references.  
4. Testing items and eligibility  criteria  
4.1 Power limit:  
4.1.1  Emission power limit:  
4.1.1.1  The conducted emission power shall conform to regulations stated in Appendix 1 and 
the deviation of rated output power value  shall be within ±2.7dB . 
4.1.1.2  The effective isotropic radiated power (EIRP) shall conform to the effective isotropic 
radiated powe r (EIRP) specified in the Technical Specifications for Mobile Broadband 
Base Station Radio Frequency Equipment and be tested during the examination of base 
station.  
4.1.2  Testing methods:  
4.1.2.1  During the measurement of emission power, one must use devi ces with RMS (root 
mean square) equivalent voltage to measure any continuous transmission time. The 
measurement results shall be used to adjust the correct emission power based on the 
responding time, resolution bandwidth capability and sensitivity of the device.  
4.1.2.2  Testing channels include three channels (low, medium and high) that test emission 
patterns with the maximum modulation level of different operating bandwidths.  
4.2 Radiation emission limit outside the conduction band:  
4.2.1  Any free radiation emission outside the operating band shall be lower than the carrier 
emission power (P) and the measurement is calculated in Watt. The edge attenuation 
outside the operating channel shall be higher  than 43 + 10 log (P) dB . 
4.2.2  Testing m ethods:  
4.2.2.1  Devices with an operating frequency lower than 1GHz . 
4.2.2.1.1  Within a range that is outside the edge of measurement channel and within 1  
GHz out -of-band, the measurement shall be conducted by using spectrum 
measurement apparatuses with a resolution bandwidth above 100  kHz; as for an  2 out-of-band range that is over 1  GHz, the measurement shall be conducted by 
using spectrum measurement apparatuses with a resolution bandwidth above 1  
MHz.  
4.2.2.1.2  Within a range of 100  kHz that is outside  the channel edge, a smaller resolution 
bandwidth shall be used to measure the radiation outside the accurate channel. 
At this moment, the minimum resolution bandwidth must be higher than 30 kHz. 
4.2.2.1.3  Testing channels include three channels (low, medium and high) that test 
emission patterns with the maximum modulation level of different operating 
bandwidths.  
4.2.2.2  Devices with an operating frequency higher than 1 GHz. 
4.2.2.2.1  Within a range that is outside the edge of measurement channel and within 1  
GHz out -of-band, the measurement shall be conducted by using spectrum 
measurement apparatuses with a resolution bandwidth above 100  kHz; as for an 
out-of-band range that is over 1  GHz, the measurement shall be conducted by 
using spectrum measurement appar atuses with a resolution bandwidth higher 
than 1  MHz.  
4.2.2.2.2  Within a range of 1  MHz that is outside the channel edge, a smaller resolution 
bandwidth shall be used to measure the radiation outside the accurate channel. 
At this moment, the minimum resolu tion band width must be higher than 1% of 
the carrier emission bandwidth (26  dB bandwidth). However, the maximum 
shall not be over 100  kHz.  
4.2.2.2.3  Testing channels include three channels (low, medium and high) that test 
emission patterns with the maximum modulation level of different operating 
bandwidths.  
4.3 Electrical safety:  
Shall comply with standard specifications stated in CNS  14336 -1. 
4.4 Electromagnetic compatibility (EMC):  
Shall comply with standard specifications stated in CNS  13438 . 
5. Test Requirement  
Except as otherwise provided in these technical specifications, testing methods for examining emission 
power and out -of-band radiation emission shall all be processed based on the inspection requirements stated 
in Point 5 of the Low -power Radio -frequency Devices Technical Specifications (LPRFD Technical 
Requirements). The inspection procedures shall be processed in accordance of the Appendix 1 "Referential 
Procedures of Inspecting Transmitters" of the Low -power Radio -frequency Devices Techn ical 
Specifications (LPRFD Technical Requirements).  
  3 Appendix 1: Limit of Transmission  Output  Power  
 Equipment  Limit Value  
Base Station  Rated output power  of equipment  
Repeater  Down link(DL) : Rated output power of equipment  
(Emission power transfer to cellular phone)  
Uplink(UL) : ≤ 31 dBm(Emission power transfer to base station)  
Micro Base Station  ≤ 39 dBm  
Pico Cell  ≤ 31 dBm  
Femto Cell  ≤ 20 dBm