MPE

FCC ID: I88VSG1435B101

RF Exposure Info

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FCCID_1359658

RF Exposure Evaluation Declaration Product: 802.11n Wireless VDSL2 4-Port Gateway with HPNA3.1 Test Item: RF Exposure Evaluation Declaration 1. RF Exposure Evaluation 1.1. Limits According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Electric Magnetic Power Average Frequency Field Field Density Time Range (MHz) Strength Strength (mW/cm2) (Minutes) (V/m) (A/m) (A) Limits for Occupational/ Control Exposures 300-1500 -- -- F/300 6 1500-100,000 -- -- 5 6 (B) Limits for General Population/ Uncontrolled Exposures 300-1500 -- -- F/1500 6 1500-100,000 -- -- 1 30 F= Frequency in MHz Friis Formula Friis transmission formula: Pd = (Pout*G)/(4*pi*r2) Where Pd = power density in mW/cm2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Page: 1 of 4

1.2. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. The temperature and related humidity: 18℃and 78％ RH. 1.3. EUT Operation condition Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. 1.4. Test Result of RF Exposure Evaluation Antenna Gain: Ant0: antenna type: Dipole antenna antenna gain:2.0dBi Ant1: antenna type: Dipole antenna antenna gain: 3.0dBi Output Power Into Antenna & RF Exposure Evaluation Distance: 1) 802.11b Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 01 2412.00 60.8135 0.0241396 06 2437.00 53.7032 0.0213176 11 2462.00 76.7361 0.0304599 2) 802.11g Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 01 2412.00 121.6186 0.0482758 06 2437.00 93.1108 0.0369598 11 2462.00 90.5733 0.0359525 Page: 2 of 4

3) 802.11n(20MHz) (An0) Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 01 2412.00 196.3360 0.0779344 06 2437.00 174.5822 0.0692993 11 2462.00 153.4617 0.0609157 4) 802.11n(20MHz) (An1) Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 01 2412.00 194.5360 0.0772199 06 2437.00 207.9697 0.0825523 11 2462.00 194.0886 0.0770423 5) 802.11n(20MHz) (An0 and An1) Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 01 2412.00 390.8409 0.1551419 06 2437.00 382.8247 0.1519599 11 2462.00 347.5362 0.1379524 Page: 3 of 4

6) 802.11n(40MHz) (An0) Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 03 2422.00 149.6236 0.0593922 06 2437.00 144.8772 0.0575081 09 2452.00 140.9289 0.0559409 7) 802.11n(40MHz) (An1) Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 03 2422.00 124.4515 0.0484003 06 2437.00 121.8990 0.0483871 09 2452.00 113.2400 0.0449499 8) 802.11n(40MHz) (An0 and An1) Test date: Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 03 2422.00 274.1574 0.1088251 06 2437.00 266.6859 0.1058593 09 2452.00 254.0973 0.1008624 Page: 4 of 4


Document Created: 2010-09-29 14:06:20
Document Modified: 2010-09-29 14:06:20
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