R F Exposure Info

FCC ID: MXF-AP930621G

RF Exposure Info

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FCCID_451082

RF EXPOSURE REPORT REPORT NO.: SA921226R01 MODEL NO.: P-560 ACCORDING: FCC Guidelines for Human Exposure IEEE C95.1 APPLICANT: Gemtek Systems ADDRESS: No.1, Jen Ai Road, Hsinchu lndustrial Park, Hukou Hsinchu, Taiwan, R.O.C. 303 ISSUED BY: Advance Data Technology Corporation LAB LOCATION: No. 19, Hwa Ya 2nd Rd., Kueishan, Taoyuan, Taiwan, R.O.C. Report No: SA921226R01 1

RF Exposure Measurement (Mobile Device) 1. Introduction In this document, we try to prove the safety of radiation harmfulness to the human body for our product. The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The Gain of the antenna used in this product is measured in a Fully Anechoic Chamber (FAC) calibrated for antenna measurement in ADT, and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis transmission formula is a far field assumption, the calculated result of that is an over-prediction for near field power density. We will take that as the worst case to specify the safety range. 2. RF Exposure Limit According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Frequency Electric Field Magnetic Field Power Density Average Time Range Strength (V/m) Strength (A/m) (mW/cm2) (minutes) (MHz) (A)Limits For Occupational / Control Exposures 300-1500 … … F/300 6 1500-100,000 … … 5 6 (B)Limits For General Population / Uncontrolled Exposure 300-1500 … … F/1500 6 1500-100,000 … … 1.0 30 F = Frequency in MHz Report No: SA921226R01 2

3. 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 If we know the maximum Gain of the antenna and the total power input to the antenna, through the calculation, we will know the MPE value at distance r. Ref. : David K. Cheng, Field and Wave Electromagnetics, Second Edition, Page 640, Eq. (11-133). 4 EUT Operating condition The software provided by Manufacturer enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. 5. Classification The antenna of the product, under normal use condition, is at least 20cm away from the body of the user. Warming statement for keeping 20cm separation distance and the prohibition of operating next to a person has been printed on the user’s manual. So, this product is classified as the Mobile Device. Report No: SA921226R01 3

6 Test Results 6.1 Antenna Gain The maximum Gain measured in Fully Anechoic Chamber are 2dBi or 1.585 (numeric). 6.2 Output Power Into Antenna & RF Exposure value at distance 20cm for CCK technique Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 29.923 0.009 1.0 6 2437 27.733 0.009 1.0 11 2462 28.907 0.009 1.0 for OFDM technique Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 23.174 0.007 1.0 6 2437 23.550 0.007 1.0 11 2462 24.155 0.008 1.0 Report No: SA921226R01 4


Document Created: 2004-07-19 20:56:21
Document Modified: 2004-07-19 20:56:21
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