RF Exposure Report

FCC ID: VV7-MBMF3307S

RF Exposure Info

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FCCID_1359903

BABT TCB Balfour House, Churchfield Road, Walton-on-Thames, Surrey, KT12 2TD RF exposure analysis for the equipment F3307 (FCC ID: VV7-MBMF3307S) The device F3307 (FCC ID: VV7-MBMF3307S) is designed as module to be installed in other devices. This device is to be used only for fixed and mobile applications. If the final product after integration is intended for portable use, a new application and FCC is required. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all the persons and must not be co-located or operating in conjunction with any other antenna or transmitter. The table below is excerpted from Table 1B of 47 CFR 1.1310 titled Limits for Maximum Permissible Exposure (MPE), Limits for General Population/Uncontrolled Exposure: 2 Frequency Range (MHz) Power density (mW/cm ) Averaging time (minutes) 300 – 1500 f (MHz) /1500 30 1500 – 100.000 1.0 30 Based on the above table the limits are: 2 For 850 MHz frequency band device: 0.55 mW/cm 2 For 1900 MHz frequency band device: 1 mW/cm Using the equation from page 19 of OET Bulletin 65, Edition 97-01: PG S= 4πR 2 2 where: S = power density (in appropriate units, e.g. mW/cm ) P = power input to the antenna (in appropriate units, e.g., mW) G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna (appropriate units, e.g., cm) Compliance with MPE limits can be guaranteed as the calculation below shows: 850 MHz frequency band Maximum output power considerations: Maximum Maximum Maximum Equivalent conducted conducted conducted conducted Duty output power (Maximum Mode output output output cycle conducted output power power (dBm) power (mW) power (W) x duty cycle) (mW) GPRS 33,41 2192,80 2,19 25% 548,20 EDGE 33,44 2208,00 2,21 25% 552,00

P Maximum power input to the antenna: 552,00 mW R Distance: 20 cm 2 S MPE limit for uncontrolled exposure: 0,55 mW/cm G1 Antenna gain (numerical) to comply with MPE limits: 5,01 G1 Antenna gain (dBi) to comply with MPE limits: 7,00 dBi ERP power limit according to §22,913 (a): 7 W G2 Antenna gain (numerical) to comply with ERP limits: 5,20 (ERP = Maximum conducted output power x Antenna gain / 1,64) G2 Antenna gain (dBi) to comply with ERP limits: 7,16 dBi G850 MHz band Min (G1, G2) 7,00 dBi Therefore the maximum antenna gain to comply with MPE and ERP limits should not exceed 7.00 dBi. 1900 MHz frequency band Maximum output power considerations: Maximum Maximum Maximum Equivalent conducted conducted conducted conducted Duty output power (Maximum Mode output output output cycle conducted output power power (dBm) power (mW) power (W) x duty cycle) (mW) GPRS 30,06 1013,91 1,01 25% 253,48 EDGE 30,12 1028,02 1,03 25% 257,00 P Maximum power input to the antenna: 257,00 mW R Distance: 20 cm 2 S MPE limit for uncontrolled exposure: 1,00 mW/cm G3 Antenna gain (numerical) to comply with MPE limits: 19,56 G3 Antenna gain (dBi) to comply with MPE limits: 12,91 dBi EIRP power limit according to §24,232 (c): 2 W G4 Antenna gain (numerical) to comply with EIRP limits: 1,95 (EIRP = Maximum conducted output power x Antenna gain) G4 Antenna gain (dBi) to comply with EIRP limits: 2,89 dBi G1900 MHz band Min (G3, G4) 2,89 dBi Therefore the maximum antenna gain to comply with MPE and EIRP limits should not exceed 2.89 dBi.


Document Created: 2010-09-27 12:19:37
Document Modified: 2010-09-27 12:19:37
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