MPE

FCC ID: V4B-SVW819

RF Exposure Info

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FCCID_1039335

FCC ID: V4B-SVW819 RF Exposure The SVW819 (800 / 1900 MHz) dual band RF Compensator is operated as a signal booster as defined in 2.1091(b) based on its design and installation. The compensator is installed in such a way that it is physically secured and is generally located more than 40 cm from the end-user. This information is included in the user manual. It is suggested that the antenna be installed such that there is at least 40 cm of separation between user and the antenna. 168

FCC ID: V4B-SVW819 RF Exposure – MPE Calculations Input Transmitter Power: 2046 mW @ 824-849MHz (Uplink) 31.0 mW @ 869-894MHz (Downlink) 1191 mW @ 1850-1910MHz (Uplink) 3.3 mW @ 1930-1990MHz (Downlink) Antenna Gain: 6 dBi all cases Cable loss: 2.5 dB @ 824–849 MHz and 869-894MHz 4.5 dB @ 1850–1910 MHz and 1930-1990MHz Frequency range: 824-849MHz and 1850-1910MHz (Uplink) 869-894MHz and 1930-1990MHz (Downlink) Assumptions 1. A single ¼ wavelength radiating antenna is assumed. 2. Closest exposure distance is assumed to be 40 cm 3. Using the formula Level 1/Limit1 + Level2/Limit2 to show predicted total RF exposure if both bands are operating simultaneously, result must be less than 1. Where: Limit 1 is the limit in the uplink band Limit 2 is the limit in the downlink band Level 1 is the calculated maximum RF exposure in the uplink band Level 2 is the calculated maximum RF exposure in the downlink band 824-894 Band (Uplink and Downlink) Combined Worst Case Exposure = 0.4986307 is less than 1 = compliant 1850-1990 Band (Uplink and Downlink) Combined Worst Case Exposure = 0.0061930 is less than 1 = compliant 169

FCC ID: V4B-SVW819 RF Exposure – MPE Calculations Calculations for Uplink The following results shall be assumed to be accurate for the far-field only. These predictions will over-estimate power density in the near–field. Based on the use of a ¼ wavelength radiator, a distance of 40 cm is considered to be in the far-field for all cases. S = PG/4*PI*R2 @ 824 – 849 MHz P is 20460 mW G is 3.5 dBi (Antenna gain – loss) or 10(3.5/10) or 2.239 Numerical R is 40 cm S = 0.228mW/cm2 For Occupational/Controlled Exposure From 300 to 1500 MHz, power density limit is f/300 mW/cm2 @ 824 MHz, power density limit is 2.747 mW/cm2 for 6 minutes. For General Population/Uncontrolled Exposure From 300 to 1500 MHz, power density limit is f/1500 mW/cm2 @ 824 MHz, Power density limit is 0.549 mW/cm2 for 30 minutes. Conclusion: Meets MPE limits @ 1850 – 1910 MHz P is 1191 mW G is 1.5 dBi (Antenna gain – loss) or 10(1.5/10) or 1.41 Numerical R is 40 cm S = 0.083715mW/cm2 For Occupational/Controlled Exposure From 1,500 to 100,000 MHz, power density limit is 5 mW/cm2 for 6 minutes. For General Population/Uncontrolled Exposure From 1,500 to 100,000 MHz, power density limit is 1 mW/cm2 for 30 minutes. Conclusion: Meets MPE limits 170

FCC ID: V4B-SVW819 RF Exposure – MPE Calculations Calculations for Downlink The following results shall be assumed to be accurate for the far-field only. These predictions will over-estimate power density in the near–field. Based on the use of a ¼ wavelength radiator, a distance of 40 cm is considered to be in the far-field for all cases. S = PG/4*PI*R2 @ 869 – 894 MHz P is 31 mW G is 3.5 dBi (Antenna gain – loss) or 10(3.5/10) or 2.239 Numerical R is 40 cm S = 0.003mW/cm2 For Occupational/Controlled Exposure From 300 to 1500 MHz, power density limit is f/300 mW/cm2 @ 869 MHz, power density limit is 2.897 mW/cm2 for 6 minutes. For General Population/Uncontrolled Exposure From 300 to 1500 MHz, power density limit is f/1500 mW/cm2 @ 869 MHz, Power density limit is 0.579 mW/cm2 for 30 minutes. Conclusion: Meets MPE limits @ 1930 – 1990 MHz P is 3.3 mW G is 1.5 dBi (Antenna gain – loss) or 10(1.5/10) or 1.41 Numerical R is 40 cm S = 0.000232mW/cm2 For Occupational/Controlled Exposure From 1,500 to 100,000 MHz, power density limit is 5 mW/cm2 for 6 minutes. For General Population/Uncontrolled Exposure From 1,500 to 100,000 MHz, power density limit is 1 mW/cm2 for 30 minutes. Conclusion: Meets MPE limits 171


Document Created: 2008-11-26 16:07:44
Document Modified: 2008-11-26 16:07:44
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