(A5) RFExp

FCC ID: PPQ-A5

RF Exposure Info

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FCCID_1729557

Report No. 124188R-RFUSP42V01 RF Exposure Evaluation declaration Product Name Wireless Music System Model No. A5 FCC ID PPQ-A5 Applicant Lite-On Technology Corp. Address 4F, 90, Chien 1 Road, Chung-Ho, Taipei Hsien 235, Taiwan, R.O.C. Date of Receipt Apr. 05, 2012 Date of Declaration Apr. 20, 2012 Report No. 124188R-RFUSP42V01 The declaration results relate only to the samples calculated. The declaration shall not be reproduced except in full without the written approval of QuieTek Corporation. This report must not be used to claim product endorsement by NVLAP any agency of the U.S. Government Page: 1 of 3

Report No. 124188R-RFUSP42V01 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) Frequency Range Electric Field Magnetic Field Power Density Average Time 2 (MHz) Strength (V/m) Strength (A/m) (mW/cm ) (Minutes) (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. 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. Page: 2 of 3

Report No. 124188R-RFUSP42V01 1.3. Test Result of RF Exposure Evaluation Product : Wireless Music System Test Item : RF Exposure Evaluation Test Site : No.3 OATS Antenna Gain: The maximum Gain measured in fully anechoic chamber is 3.72 dBi in logarithm scale. 802.11b Output Power Into Antenna & RF Exposure Evaluation Distance (3.72 dBi): Output Power to Antenna Power Density at R = 20 cm Channel Frequency (MHz) (mW) (mW/cm2) 1 2412.00 64.1210 0.030042 6 2437.00 73.2825 0.034334 11 2462.00 70.9578 0.033245 2 Power density in column 4 is much lower than the limit (1 mW/cm ). 802.11g Output Power Into Antenna & RF Exposure Evaluation Distance (3.72 dBi): Output Power to Antenna Power Density at R = 20 cm Channel Frequency (MHz) (mW) (mW/cm2) 1 2412.00 121.0598 0.056719 6 2437.00 126.1828 0.059119 11 2462.00 63.8263 0.029904 Power density in column 4 is much lower than the limit (1 mW/cm2). Page: 3 of 3


Document Created: 2012-05-15 09:31:50
Document Modified: 2012-05-15 09:31:50
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