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1、1,For the benefit of business and people,Bureau Veritas-ADT,Bureau Veritas Consumer Products Services,September,2007,美國手機產品法規測項簡介,CFR 47 part 22 CFR 47 part 24,3,Rule,CFR 47 Telecommunication CFR ( Code of Federal Regulations ) PART 2 FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND
2、 REGULATIONS PART 22 PUBLIC MOBILE SERVICES (Subpart HCellular Radiotelephone Service) PART 24 PERSONAL COMMUNICATIONS SERVICES (Subpart EBroadband PCS ),4,Measurement requirements,Certification - 2.907 2.1046 RF power output 2.1047 Modulation characteristics 2.1049 Occupied bandwidth 2.1051 Spuriou
3、s emissions at antenna terminals (Conducted) 2.1053 Field strength of spurious radiation (Radiated) 2.1055 Frequency stability,5,Technical requirements,PART 22 PUBLIC MOBILE SERVICES (Subpart HCellular Radiotelephone Service) UL 824849 / DL 869894 MHz Channel block A/B 22.913 Effective radiated powe
4、r limits 22.917 Emission limitations for cellular equipment,6,Technical requirements,PART 24 PERSONAL COMMUNICATIONS SERVICES (Subpart EBroadband PCS ) UL 18501910 / DL 19301990 MHz Channel block AF 24.232 Power limit. 24.235 Frequency stability. 24.238 Emission limitations for Broadband PCS equipme
5、nt.,7,PART 24 Power limit,Mobile/portable stations are limited to 2 watts EIRP peak power and the equipment must employ means to limit the power to the minimum necessary for successful communications.,8,PART 24 Frequency stability,The frequency stability shall be sufficient to ensure that the fundam
6、ental emission stays within the authorized frequency block .,9,PART 24 Spurious emissions at antenna terminals,Out of band emissions. The power of any emission outside of the authorized operating frequency ranges must be attenuated below the transmitting power (P) by a factor of at least 43 + 10 log
7、(P) dB. The emission bandwidth is defined as the width of the signal between two points, one below the carrier center frequency and one above the carrier center frequency, outside of which all emissions are attenuated at least 26 dB below the transmitter power.,10,PART 22 Effective radiated power li
8、mits,The ERP of mobile transmitters and auxiliary test transmitters must not exceed 7 Watts.,11,PART 22 Emission limitations for cellular equipment,Out of band emissions. The power of any emission outside of the authorized operating frequency ranges must be attenuated below the transmitting power (P
9、) by a factor of at least 43 + 10 log(P) dB. The emission bandwidth is defined as the width of the signal between two points, one below the carrier center frequency and one above the carrier center frequency, outside of which all emissions are attenuated at least 26 dB below the transmitter power.,1
10、2,Measurement : EIRP,EIRP Effective (equivalent) Isotropic Radiated Power EIRP is the power feeding an isotropic antenna (with 0dBi Gain) located at where the EUT was and can produce the same radiation effect with that of the EUT on the receiving antenna ERP Effective Radiated Power ERP=EIRP - 2.148
11、4dB,13,Measurement : Occupied bandwidth,Occupied bandwidth : The emission bandwidth is defined as the width of the signal between two points, one below the carrier center frequency and one above the carrier center frequency, outside of which all emissions are attenuated at least 26 dB below the tran
12、smitter power.,14,Measurement : Out of band emissions,Out of band emissions: ( Conducted & Radiated emissions) The power of any emission outside of the authorized operating frequency ranges must be attenuated below the transmitting power (P) by a factor of at least 43 + 10 log(P) dB. e.g. Tx power 1
13、W = 30dBm 30dBm (43+10log(1) )= -13dBm Tx power 0.5W = 27dBm 27dBm (43+10log(0.5) = 27dBm (43 +(-3) = -13dBm 1GHz Radiated Emission Limit -13dBm = 82.22dBuV/m,15,Measurement : BAND EDGE,Publication Number: 764661 Question: For licensed devices, is it acceptable to use a reduced video filter techniqu
14、e to simulate average measurements rather than using an average detector? For example, the spectrum analyzer is set to to 100 kHz RBW with the VBW set to 100 Hz This technique is done in order to smooth out the spectral signature. Answer : No, it is not acceptable to simulate average measurements wi
15、th a reduced video filter (VBW). Always use, the appropriate detector (average, peak, normal ,sample, quasi-peak) when making measurements for licensed devices.,16,Measurement : Frequency stability,Frequency stability : The frequency stability shall be sufficient to ensure that the fundamental emiss
16、ion stays within the authorized frequency block. ( limit 2.5ppm - Canada RSS 132 ) Remark: 2.1055 (a) The frequency stability shall be measured with variation of ambient temperature as follows: (1) From 30 to +50 centigrade for all equipment (b) Frequency measurements shall be made at the extremes o
17、f the specified temperature range and at intervals of not more than 10 centigrade through the range. (d) The frequency stability shall be measured with variation of primary supply voltage as follows: (1) Vary primary supply voltage from 85 to 115 percent of the nominal value for other than hand carried battery equipment. (2) For hand carried, battery powered equipment, reduce primary supply voltage to the battery operating end point which shall be specified by the manufacturer.,Thanks a Lot,