RF Exposure Report

FCC ID: S8J-R8723RB1

RF Exposure Info

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FCCID_2734636

RF EXPOSURE EVALUATION

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)

FCC ID：S8J-R8723RB1

EUT Specification
EUT Bluetooth 150Mbps Wireless N USB Module
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 4.43dBm For BT Ver.3.0+EDR
2.02dBm For BT 4.0
14.10dBm For WiFi
Antenna gain (Max) 2dBi
Evaluation applied MPE Evaluation
SAR Evaluation

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
300-1500 -- -- F/300 6
1500-100000 -- -- 5 6
(B) Limits for General Population/Uncontrol Exposures
300-1500 -- -- F/1500 6
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. Measurement Result For BT Ver.3.0+EDR: Measurement Peak Output Power(dBm) Channel Frequency (MHz) GFSK Π/4-DQPSK 8DPSK 2402 4.43 3.29 3.53 2441 3.58 2.42 2.58 2480 2.77 1.44 1.60 Channel Tune up Output Ant. Power Power Max tune up Ant. Frequency tolerance Peak Gain density at density conducted Gain (MHz) (dBm) power (nume 20cm Limits power(dBm) (dBi) (mW) ric) (mW/cm2 ) (mW/cm2 ) 2402 4±1 5 3.16 2 1.585 0.000997 1 2441 4±1 5 3.16 2 1.585 0.000997 1 2480 3±1 4 2.51 2 1.585 0.000792 1 2402 3±1 4 2.51 2 1.585 0.000792 1 2441 3±1 4 2.51 2 1.585 0.000792 1 2480 1±1 2 1.58 2 1.585 0.000500 1 2402 4±1 5 3.16 2 1.585 0.000997 1 2441 3±1 4 2.51 2 1.585 0.000792 1 2480 2±1 3 2.00 2 1.585 0.000629 1$

For BT 4.0:
Measurement Peak Output
Channel Frequency
Power(dBm)
(MHz)
GFSK
2402 1.23
2440 1.19
2480 2.02

Channel Tune up Output Power Power
Max tune up Ant.
Frequency tolerance Peak Ant. Gain density at density
conducted Gain
(MHz) (dBm) power (numeric) 20cm Limits
power(dBm) (dBi)
(mW) (mW/cm2 ) (mW/cm2 )
2402 1±1 2 1.58 2 1.585 0.000500 1
2440 1±1 2 1.58 2 1.585 0.000500 1
2480 2±1 3 2.00 2 1.585 0.000629 1

For WiFi:
Max Output Power (dBm)
Test Limit
802.11n 802.11n Result
Channel 802.11b 802.11g (dBm)
(HT20) (HT40)
Lowest 14.10 11.81 10.73 10.25
Middle 13.90 11.90 10.19 9.92 30 Pass
Highest 13.25 11.38 9.90 9.59

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 2 1.585 0.009971 1
802.11b 6 14±1 15 31.62 2 1.585 0.009971 1
11 13±1 14 25.12 2 1.585 0.007921 1
1 11±1 12 15.85 2 1.585 0.004998 1
802.11g 6 12±1 13 19.95 2 1.585 0.006292 1
11 11±1 12 15.85 2 1.585 0.004998 1
1 11±1 12 15.85 2 1.585 0.004998 1
802.11n
6 10±1 11 12.59 2 1.585 0.003970 1
(H20)
11 10±1 11 12.59 2 1.585 0.003970 1
3 10±1 11 12.59 2 1.585 0.003970 1
802.11n
6 10±1 11 12.59 2 1.585 0.003970 1
(H40)
9 10±1 11 12.59 2 1.585 0.003970 1

Document Created: 2015-08-11 15:18:13
Document Modified: 2015-08-11 15:18:13