【法规名称】
【法规编号】 58628 什么是编号？
【正 文】
第6页 CAP 106B TELECOMMUNICATIONS (CONTROL OF INTERFERENCE) REGULATIONS
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[接上页] 2. Limits of radiated interference due to the local oscillator at its fundamental and harmonic frequencies and due to all other sources at a distance of 3 m: Equipment Type Source Frequency (MHz) Field Strength Limit (dBμV/m) [6] Quasi-peak Television receivers and video recorders Local oscillator Other 300-1000 121.5 243 Fundamental 56 [7] Harmonics 56 40 47 Frequency modulation sound receivers [8] Local oscillator 30-300 300-1000 Fundamental 60 Harmonics 52 Harmonics 56 Note: [6] At the transition frequency, the lower limit applies. [7] If a standard intermediate frequency is used, the limit at the local oscillator fundamental frequency of television receivers and video recorders can be relaxed to 70. [8] For car radio receivers no radiation limits apply. 3. Limits of interference voltage at the aerial terminals: Equipment Type Source Frequency (MHz) Interference Voltage Limit [9][10] (dBμV) 75 Ω Quasi-peak Television receivers and video recorders working in channels between 30MHz and 1 GHz Local oscillator Other 30-950 950-1750 30-1750 Fundamental 46 Harmonics 46 Harmonics 54 [11] 46 Television receivers for broadcast satellite transmission: tuner units at 1st IF [12] Local oscillator Other 30-950 950-1750 30-1750 Fundamental 46 Fundamental 54 [11] 46 Frequency modulation sound receivers Local oscillator Other 30-300 300-1000 30-1000 Fundamental 54 Harmonics 50 Harmonics 52 46 Frequency modulation car radios Local oscillator 30-300 300-1000 Fundamental 66 Harmonics 59 Harmonics 52 Note: [9] The interference voltage limits for receivers with nominal impedance other than 75 Ω are calculated according to the following formula: Lz = L75 + 10 log (Z/75) dBμV where Z = nominal impedance in Ω L75 = interference voltage limit for 75 Ω nominal impedance Lz = interference voltage limit for Z nominal impedance [10] At the transition frequency, the lower limit applies. [11] The value of 54 dBμV is intended to be reduced to 46 dBμV. [12] "1st IF" stands for "first intermediate frequency". For tuner units, "aerial terminals" (天线接线端子) means "1st IF input terminals". PART IV FLUORESCENT LAMPS AND LUMINAIRES 1. Minimum value of insertion loss of luminaires with or without starters designed for the following types of fluorescent lamps: (a) linear fluorescent lamps with a nominal diameter of 15 mm, 25 mm or 38 mm; (b) circular fluorescent lamps with a nominal diameter of 28 mm or 32 mm; (c) U-type fluorescent lamps with a nominal diameter of 15 mm, 25 mm or 38 mm; (d) single-capped fluorescent lamps, without integrated starter and with a nominal diameter of 15 mm. Frequency (kHz) 160 240 550 1000 1400 Minimum values of insertion loss (dB) 28 26 24 22 20 2. Mains terminal interference voltages for all types of luminaires for which the insertion loss limits do not apply shall comply with the mains terminal voltage limits as shown in the table below. These limits shall also apply to self-ballasted fluorescent lamps. Frequency Range Interference Voltage Limit [4] (dBμV) Quasi-peak Average [2] 9 kHz-50 kHz [3] 50 kHz-150 kHz [3] 150 kHz-0.5 MHz 0.5 MHz-5 MHz 5 MHz-30 MHz 110 90-80 [1] 66-56 [3] 56 60 56-46 [3] 46 50Note: [1] The limit decreases linearly with the logarithm of the frequency in the ranges 50 kHz to 150 kHz and 150 kHz to 0.5 MHz. [2] If it is certain that only broadband interference sources are present, then the average measurements need not be made. [3] The limit values in the frequency range may be modified at a later date. [4] At the transition frequencies, the lower limit applies. PART V HOUSEHOLD ELECTRICAL APPLIANCES, SIMILAR ELECTRICAL APPARATUS AND PORTABLE TOOLS Limits of radio interference in the range 0.15 MHz to 300 MHz. 1. Continuous conducted interference Limits of continuous conducted interference voltage for the frequency range 0.15 MHz to 30 MHz. (a) Household electrical appliances and electrical apparatus causing similar interference: Frequency Range (MHz) Interference Voltage Limit (dBμV)[1] Quasi-peak Average* 0.15-0.5 66-56 [2] 59-46 [2] 0.5-5 56 46 5-30 60 50Note: [1] At the transition frequency, the lower limit applies. [2] The voltage limit decreases linearly with the logarithm of the freguency. (b) Electrical apparatus with regulating controls incorporating semi-conductor devices: Frequency Range (MHz) Interference Voltage Limit (dBμV) [3] At mains terminals At load terminals and at additional terminals Quasi-peak Average* Quasi-peak Average* 0.15-0.5 66-56 [4] 56-46 [4] 80 70 0.5-5 56 46 74 64 5-30 60 50 74 64Note: [3] At the transition frequency, the lower limit applies. [4] The voltage limit decreases linearly with the logarithm of the frequency. (c) Portable tools (i) with rated power of motor** not exceeding 700 W: |
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