RF Exposure Evaluation_Rev1.0

FCC ID: S8J-WMR8300

RF Exposure Info

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FCCID_2596753

RF EXPOSURE EVALUATION EUT Specification EUT 300Mbps Wireless N ADSL2 Modem Router FCC ID S8J-WMR8300 Frequency band WLAN: 2.412GHz ~ 2.462GHz (Operating) WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz WLAN: 5.745GHz ~ 5825GHz Others Device category Portable (<20cm separation) Mobile (>20cm separation) Others ___ Exposure classification Occupational/Controlled exposure (S = 5mW/cm2) General Population/Uncontrolled exposure (S=1mW/cm2) Antenna diversity Single antenna Multiple antennas Tx diversity Rx diversity Tx/Rx diversity Max. output power 16.47dBm (0.04436W)for 802.11b; 15.92dBm (0.03908W)for 802.11g; 13.78dBm (0.02388W)for 802.11/n(HT20); 13.48dBm (0.02228W)for 802.11n(HT40); Antenna gain (Max) 5.0dBi ( for per antenna port Max) 8.01dBi for MIMO(Ant1+Ant2 Directional Gain) Evaluation applied MPE Evaluation SAR Evaluation 1

Applicable Standard: Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy levels in excess limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J. Section 2.1091 this device has been defined as a mobile device whereby a distance of 0.2m Normally can be maintained between the user and the device. Limits for Maximum Permissible Exposure(MPE) Frequency Electric Field Magnetic Field Power Average Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm2) Time (A) Limits for Occupational/Control Exposures 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 -- -- F/1500 30 1500-100000 -- -- 1 30 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 the limit of MPE, 1mW/cm2. If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. 2

Measurement Result Max power Result: Operation Channel Channel Measurement Level Limit Mode Number Frequency (dBm) (dBm) Verdict (MHz) Ant1 Ant2 Sum 1 2412 14.52 13.62 -- 30 PASS 802.11b 6 2437 15.36 14.05 -- 30 PASS 11 2462 16.47 15.94 -- 30 PASS 1 2412 13.65 13.26 -- 30 PASS 802.11g 6 2437 14.05 13.65 -- 30 PASS 11 2462 15.92 14.42 -- 30 PASS 1 2412 9.41 8.74 12.10 28 PASS 802.11n 6 2437 10.05 9.06 12.59 28 PASS (HT20) 11 2462 11.25 10.22 13.78 28 PASS 3 2422 8.42 9.13 11.80 28 PASS 802.11n 6 2437 9.06 10.12 12.63 28 PASS (HT40) 9 2452 10.58 10.36 13.48 28 PASS Antenna 1: Tune up Power Power Output tolerance Max tune up Ant. density at density Operating Test Peak Ant. Gain (dBm) conducted Gain 20cm Limits Mode Channel power (numeric) power(dBm) (dBi) (mW/ (mW/cm2 (mW) cm2 ) ) 1 15±1 16 39.81 5 3.162 0.025045 1 802.11b 6 15±1 16 39.81 5 3.162 0.025045 1 11 16±1 17 50.12 5 3.162 0.031530 1 1 14±1 15 31.62 5 3.162 0.019894 1 802.11g 6 14±1 15 31.62 5 3.162 0.019894 1 11 16±1 17 50.12 5 3.162 0.031530 1 1 9±1 10 10.00 5 3.162 0.006291 1 802.11n 6 10±1 11 12.59 5 3.162 0.007920 1 (HT20) 11 11±1 12 15.85 5 3.162 0.009971 1 3 8±1 9 7.94 5 3.162 0.004997 1 802.11n 6 9±1 10 10.00 5 3.162 0.006291 1 (HT40) 9 11±1 12 15.85 5 3.162 0.009971 1 3

Antenna 2: Tune up Power Output Power tolerance Max tune up Ant. density at Operating Test Peak Ant. Gain density (dBm) conducted Gain 20cm Mode Channel power (numeric) Limits power(dBm) (dBi) (mW/ (mW) (mW/cm2 ) cm2 ) 1 14±1 15 31.62 5 3.162 0.019894 1 802.11b 6 14±1 15 31.62 5 3.162 0.019894 1 11 16±1 17 50.12 5 3.162 0.031530 1 1 13±1 14 25.12 5 3.162 0.015803 1 802.11g 6 14±1 15 31.62 5 3.162 0.019894 1 11 14±1 15 31.62 5 3.162 0.019894 1 1 9±1 10 10.00 5 3.162 0.006291 1 802.11n 6 9±1 10 10.00 5 3.162 0.006291 1 (HT20) 11 10±1 11 12.59 5 3.162 0.007920 1 3 9±1 10 10.00 5 3.162 0.006291 1 802.11n 6 10±1 11 12.59 5 3.162 0.007920 1 (HT40) 9 10±1 11 12.59 5 3.162 0.007920 1 MPE Result: Operation Channel Channel Power density at 20cm (mW/ cm2 ) Power Mode Number Frequency Ant1 Ant2 Sum density Verdict (MHz) Limits (mW/cm2 ) 1 2412 0.025045 0.019894 -- 1 PASS 802.11b 6 2437 0.025045 0.019894 -- 1 PASS 11 2462 0.031530 0.031530 -- 1 PASS 1 2412 0.019894 0.015803 -- 1 PASS 802.11g 6 2437 0.019894 0.019894 -- 1 PASS 11 2462 0.031530 0.019894 -- 1 PASS 1 2412 0.006291 0.006291 0.012582 1 PASS 802.11n 6 2437 0.007920 0.006291 0.014211 1 PASS (HT20) 11 2462 0.009971 0.007920 0.017891 1 PASS 3 2422 0.004997 0.006291 0.011288 1 PASS 802.11n 6 2437 0.006291 0.007920 0.014211 1 PASS (HT40) 9 2452 0.009971 0.007920 0.017891 1 PASS 4


Document Created: 2015-04-24 13:26:20
Document Modified: 2015-04-24 13:26:20
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