rf exp

FCC ID: PPQ-CR8702SB

RF Exposure Info

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FCCID_1720630

Report No. 125030R-RFUSP42V01-A RF Exposure Evaluation declaration Product Name : JukeBlox Networked Media Module Model No. : CR870-2S-B FCC ID : PQ-CR8702SB Applicant : Lite-On Technology Corp. Address : 4F,90,Chien 1 Road,Chung-Ho,Taipei Hsien 235,Taiwan,R.O.C. Date of Receipt : Apr. 27, 2012 Date of Declaration : May 24, 2012 Report No. : 125030R-RFUSP42V01-A 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. 125030R-RFUSP42V01-A 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. 125030R-RFUSP42V01-A 1.3. Test Result of RF Exposure Evaluation Product : JukeBlox Networked Media Module Test Item : RF Exposure Evaluation Test Site : No.3 OATS (802.11b 1Mbps) Output Power Into Antenna & RF Exposure Evaluation Distance (2dBi): Output Power to Antenna Power Density at R = 20 cm Channel Frequency (MHz) (mW) (mW/cm2) 01 2412.00 66.0693 0.020832 06 2437.00 67.7642 0.021366 11 2462.00 67.9204 0.021416 Power density in column 4 is much lower than the limit (1 mW/cm2). (802.11g 6Mbps) Output Power Into Antenna & RF Exposure Evaluation Distance (2dBi): Output Power to Antenna Power Density at R = 20 cm Channel Frequency (MHz) (mW) (mW/cm2) 01 2412.00 209.4112 0.066028 06 2437.00 191.8669 0.060497 11 2462.00 178.6488 0.056329 Power density in column 4 is much lower than the limit (1 mW/cm2). Page: 3 of 3


Document Created: 2012-05-31 17:17:50
Document Modified: 2012-05-31 17:17:50
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