RF Exposure Info

FCC ID: U2M-UB9700702

RF Exposure Info

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FCCID_880613

FCC ID: U2M-UB9700702 RF EXPOSURE REPORT REPORT NO.: SA960627L15 MODEL NO.: EUB-9701 EXT2 ACCORDING: FCC Guidelines for Human Exposure IEEE C95.1 APPLICANT: Senao Networks Inc. ADDRESS: 3F, No. 529, Chung Cheng Rd., Hsintien, Taipei, Taiwan, R.O.C. ISSUED BY: Advance Data Technology Corporation LAB ADDRESS: 47 14th Lin, Chiapau Tsun, Linko, Taipei, Taiwan, R.O.C. TEST LOCATION: No. 19, Hwa Ya 2nd Rd., Kueishan, Taoyuan, Taiwan, R.O.C. Report No: SA960627L15 1

FCC ID: U2M-UB9700702 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 (MHz) STRENGTH (V/m) STRENGTH (A/m) (mW/cm2) (minutes) (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 30 1500-100,000 … … 1.0 30 F = Frequency in MHz Report No: SA960627L15 2

FCC ID: U2M-UB9700702 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 far away from the body of the user. Warning statement to the user for keeping at least 20cm or more separation distance with the antenna should be included in users manual. So, this device is classified as Mobile Device. Report No: SA960627L15 3

FCC ID: U2M-UB9700702 6. TEST RESULTS 6.1 ANTENNA GAIN The maximum Gain measured in Fully Anechoic Chamber is 2dBi or 1.58489 (numeric). 6.2 OUTPUT POWER INTO ANTENNA & RF EXPOSURE VALUE AT DISTANCE 20cm: 802.11b DSSS MODULATION: LIMIT OF CHANNEL PEAK POWER POWER PEAK POWER POWER CHANNEL FREQUENCY OUTPUT DENSITY OUTPUT (mW) DENSITY (MHz) (dBm) (mW/CM2) (mW/CM2) 1 2412 36.058 15.57 0.011 1.000 6 2437 71.779 18.56 0.023 1.000 11 2462 36.475 15.62 0.012 1.000 802.11g OFDM MODULATION: PEAK POWER OUTPUT PEAK POWER OUTPUT TOTAL TOTAL LIMITOF CHANNEL POWER (mW) (dBm) PEAK PEAK POWER CHAN. FREQUENCY DENSITY POWER POWER (mW/CM2) DENSITY (MHz) 2 (mW/CM ) CHAIN 0 CHAIN 1 CHAIN 0 CHAIN 1 (mW) (dBm) 1 2412 19.953 28.774 13.00 14.59 48.727 16.88 0.015 1.000 6 2437 57.280 63.241 17.58 18.01 120.521 20.81 0.038 1.000 11 2462 20.230 25.468 13.06 14.06 45.698 16.60 0.014 1.000 Report No: SA960627L15 4

FCC ID: U2M-UB9700702 DRAFT 802.11n (20MHz) OFDM MODULATION: PEAK POWER OUTPUT PEAK POWER OUTPUT TOTAL TOTAL LIMITOF CHANNEL POWER (mW) (dBm) PEAK PEAK POWER CHAN. FREQUENCY DENSITY POWER POWER (mW/CM2) DENSITY (MHz) 2 (mW/CM ) CHAIN 0 CHAIN 1 CHAIN 0 CHAIN 1 (mW) (dBm) 1 2412 17.865 25.410 12.52 14.05 43.275 16.36 0.014 1.000 6 2437 57.943 56.364 17.63 17.51 114.307 20.58 0.036 1.000 11 2462 18.155 22.491 12.59 13.52 40.646 16.09 0.013 1.000 DRAFT 802.11n (40MHz) OFDM MODULATION: PEAK POWER OUTPUT PEAK POWER OUTPUT TOTAL TOTAL LIMITOF CHANNEL POWER (mW) (dBm) PEAK PEAK POWER CHAN. FREQUENCY DENSITY POWER POWER (mW/CM2) DENSITY (MHz) 2 (mW/CM ) CHAIN 0 CHAIN 1 CHAIN 0 CHAIN 1 (mW) (dBm) 1 2412 12.882 12.882 11.10 11.10 25.765 14.11 0.008 1.000 4 2437 31.989 32.509 15.05 15.12 64.498 18.10 0.020 1.000 7 2452 12.823 12.823 11.08 11.08 25.647 14.09 0.008 1.000 Report No: SA960627L15 5


Document Created: 2007-12-05 11:15:14
Document Modified: 2007-12-05 11:15:14
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