RF Exposure

FCC ID: PPQ-CR8702N

RF Exposure Info

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FCCID_1484429

Report No. 112045R-RFUSP42V01 RF Exposure Evaluation declaration Product Name JukeBlox Networked Media Module Model No. CR870-2N FCC ID PPQ-CR8702N Applicant Lite-On Technology Corp. Address 4F, 90 ,Chien 1 Road,Chung-Ho,Taipei Hsien 235,Taiwan,R.O.C. Date of Receipt Feb. 01, 2010 Date of Declaration May. 23, 2011 Report No. 112045R-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. 112045R-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. 112045R-RFUSP42V01 1.3. Test Result of RF Exposure Evaluation Product : JukeBlox Networked Media Module Test Item : RF Exposure Evaluation Test Site : No.3 OATS External Antenna Gain Antenna Gain: The maximum Gain measured in fully anechoic chamber is 4.19 dBi in logarithm scale. 802.11b Output Power Into Antenna & RF Exposure Evaluation Distance (4.19 dBi): Output Power to Antenna Power Density at R = 20 cm Channel Frequency (MHz) (mW) (mW/cm2) 1 2412.00 34.8337 0.018186 6 2437.00 36.3078 0.018955 11 2462.00 36.3915 0.018999 802.11g Output Power Into Antenna & RF Exposure Evaluation Distance (4.19 dBi): Output Power to Antenna Power Density at R = 20 cm Channel Frequency (MHz) (mW) (mW/cm2) 1 2412.00 132.7394 0.069300 6 2437.00 133.9677 0.069941 11 2462.00 137.4042 0.071735 The distance r (4th column) calculated from the Fries transmission formula is far shorter than 20 cm separation requirement. Page: 3 of 3


Document Created: 2011-06-02 15:45:04
Document Modified: 2011-06-02 15:45:04
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