 1 MHz filter is 4 MHz and 12 MHz. The lower limit shall be -50 dBm/3.84 MHz or which ever is higher. The BS spectrum emission mask illustrated in Figure 5.5 and outlined in Table 5.13 may be mandatory in some regions and may not apply to others. Where it applies, BS transmitting on a single RF carrier and configured according to the manufacturer's specification shall meet specified requirements. The mask basically applies to the FDD and TDD. Frequency separation Af from the carrier [MHz] P 43 dBm P 39 dBm P 31 dBm Figure 5.5 BS spectrum emission mask [3]. For example, emissions for the appropriate BS maximum output power, in the fre- quency range from Af = 2.5 MHz to f_offsetmax from the carrier frequency, shall not exceed the maximum level specified in Table 5.13 [3-4], where: Af = separation between the carrier frequency and the nominal -3 dB point of the measuring filter closest to the carrier frequency. F_offset = separation between the carrier frequency and the centre of the measuring filter. f_offsetmax max = 12.5 MHz or is the offset to the UMTS Tx band edge, whichever is the greater. The UMTS Network and Radio Access Technology Table 5.13 BS Spectrum Emission Mask Values Af of measure- If of filter measurement at Maximum level (dBm) Measure- ment filter -3 dB centre frequency (MHz) point (MHz) bandwidth BS maximum output power P > 43 dBm 2.5 Af < 2.7 2.515 Af<2.715 30 kHz 2.7 < Af < 3.5 2.715 Af<<.3.515 -14-15-(Af-2.715) - 30 kHz 3.515 Af<4.0 30 kHz 3.5 Af 4.0 Af < Afmax 1 MHz BS maximum output power 39 <P < 43 dBm 2.5 Af < 2.7 2.515 Af 2.715 30 kHz 2.7 < Af 3.5 2.715 f<3.515 -14-15.(Af 2.715) 30 kHz 3.515 Af<4.0 30 kHz 3.5 < Af 7.5 4.0 Af 7.5 1 MHz 7.5 Af 7.5 Af < If max 1 MHz BS maximum output power 31 <P < 39 dBm 2.5 Af<2.7 2.515 Af < 2.715 P - 53 30 kHz 2.7 < Af < 3.5 2.715 Af<<.3.515 P - 53 - 15.(Af - 2.715) 30 kHz 3.515 Af<4.0 30 kHz 3.5 Af 7.5 4.0 Af 7.5 1 MHz 7.5 < Af 7.5 Af Afmax 1 MHz BS maximum output power P < 31 dBm 2.5 Af 2.7 2.515 Af < 2.715 30 kHz 2.7 Af 3.5 2.715 <3.515 -22 - 15.(Af - 2.