RF Exposure

FCC ID: 2AUHL-E0382

RF Exposure Info

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FCCID_4495809

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD FCC ID: 2AUHL-E0382

Maximum Permissible Exposure Report

1. Product Information

FCC ID : 2AUHL-E0382
EUT : Wireless Repeater/AP
Test Model : E0382
Power Supply : Power Input: AC 100-240V 50/60HZ 0.3A
Hardware Version : V1.2
Software Version : sdk3.4.11d
WIFI(2.4G Band) :
Frequency Range : 2412MHz-2462MHz
Channel Spacing : 5MHz
Channel Number : 11 channels for 20MHz bandwidth(2412MHz~2462MHz)
7 channels for 40MHz bandwidth(2422MHz~2452MHz)
Modulation Type : 802.11b: DSSS(CCK,DQPSK,DBPSK);
802.11g/n: OFDM(64QAM, 16QAM, QPSK, BPSK)
Antenna Description :
external antenna (Ant_1: 2.4G WIFI), 3.0dBi(max.)
external antenna (Ant_2: 2.4G WIFI), 3.0dBi(max.)
Exposure category : General population/uncontrolled environment
EUT Type : Production Unit
Device Type : Mobile Device

This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD FCC ID: 2AUHL-E0382

2. Evaluation Method
Systems operating under the provisions of FCC 47 CFR section shall be operated in a manner that ensures
that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines.
In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as mobile
device whereby a distance of 0.2m normally can be maintained between the user and the device, and below
RF Permissible Exposure limit shall comply with.
In accordance with KDB447498 D01 General RF Exposure Guidance v06 for Simultaneous transmission
MPE test exclusion applies when the sum of the MPE ratios for all simultaneous transmitting antennas
incorporated in a host device, based on the calculated/estimated, numerically modelled or measured field
strengths or power density, is ≤ 1.0. The MPE ratio of each antenna is determined at the minimum test
separation distance required by the operating configurations and exposure conditions of the host device,
according to the ratio of field strengths or power density to MPE limit, at the test frequency. Either the
maximum peak or spatially averaged results from measurements or numerical simulations may be used to
determine the MPE ratios. Spatial averaging does not apply when MPE is estimated using simple
calculations based on far-field plane-wave equivalent conditions. The antenna installation and operating
requirements for the host device must meet the minimum test separation distances required by all antennas,
in both standalone and simultaneous transmission operations, to satisfy compliance.

3. Limit
3. 1 Refer evaluation method

ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency
Electromagnetic Fields, 3 kHz to 300 GHz.
FCC KDB publication 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Devices RF
Exposure Procedures and Equipment Authorization Policies.
FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits.
FCC CFR 47 part2 2.1091: Radiofrequency radiation exposure evaluation: mobile devices.

3. 2 Limit

Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure
Frequency Electric Field Magnetic Field Power Density Averaging Time
Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²) (minute)
Limits for Occupational/Controlled Exposure
0.3 – 3.0 614 1.63 (100) * 6
3.0 – 30 1842/f 4.89/f (900/f2)* 6
30 – 300 61.4 0.163 1.0 6
300 – 1500 / / f/300 6
1500 – 100,000 / / 5 6
Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure
Frequency Electric Field Magnetic Field Power Density Averaging Time
Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²) (minute)
Limits for Occupational/Controlled Exposure
0.3 – 3.0 614 1.63 (100) * 30
3.0 – 30 824/f 2.19/f (180/f2)* 30
30 – 300 27.5 0.073 0.2 30
300 – 1500 / / f/1500 30
1500 – 100,000 / / 1.0 30

F=frequency in MHz
*=Plane-wave equivalent power density

This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD FCC ID: 2AUHL-E0382

4. MPE Calculation Method
Predication of MPE limit at a given distance
Equation from page 18 of OET Bulletin 65, Edition 97-01

S=PG/4πR²

Where: S=power density
P=power input to antenna
G=power gain of the antenna in the direction of interest relative to an isotropic radiator
R=distance to the center of radiation of the antenna

5. Antenna Information
Netbox Duo can only use antennas certificated as follows provided by manufacturer;

Internal Antenna Identification Antenna type and Operate frequency Maximum antenna
Identification in Internal photos antenna number band gain
2.4GHz – 2.4835
Ant_1 2.4G Wifi external antenna 3.0dBi(Max.)
GHz
2.4GHz – 2.4835
Ant_2 2.4G Wifi external antenna 30dBi(Max.)
GHz

6. Measurement Results
6.1 Standalone MPE

As declared by the Applicant, the EUT is a wireless device used in a fix application, at least 20 cm from any
body part of the user or nearby persons; from the maximum EUT RF output power, the minimum separation
distance, r =20cm, as well as the gain of the used antenna refer to antenna information, the RF power
density can be obtained.

2.4GHz WLAN
Ant_1
Max. Tune Up Antenna Antenna MPE
Output power Duty MPE
Modulation Type Gain Gain Limits
Cycle (mW/cm2)
dBm mW (dBi) (linear) (mW/cm2)
IEEE 802.11b 20.00 100.0000 3.0000 1.9953 100% 0.0397 1.0000
IEEE 802.11g 22.00 158.4893 3.0000 1.9953 100% 0.0629 1.0000
IEEE 802.11n HT20 20.00 100.0000 3.0000 1.9953 100% 0.0397 1.0000
IEEE 802.11n HT40 20.00 100.0000 3.0000 1.9953 100% 0.0397 1.0000

Ant_2
Max. Tune Up Antenna Antenna MPE
Output power Duty MPE
Modulation Type Gain Gain Limits
Cycle (mW/cm2)
dBm mW (dBi) (linear) (mW/cm2)
IEEE 802.11b 20.00 100.0000 3.0000 1.9953 100% 0.0397 1.0000
IEEE 802.11g 22.00 158.4893 3.0000 1.9953 100% 0.0629 1.0000
IEEE 802.11n HT20 20.00 100.0000 3.0000 1.9953 100% 0.0397 1.0000
IEEE 802.11n HT40 20.00 100.0000 3.0000 1.9953 100% 0.0397 1.0000

Remark:
1. Output power (Average) including turn-up tolerance;
2. Output power was adjust to duty cycle at 100% if measured duty cycle less than 98%;
3. MPE evaluate distance is 20cm from user manual provide by manufacturer.

This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD FCC ID: 2AUHL-E0382

6.2 Simultaneous Transmission MPE

The sample supports 2 antennas for 2.4GHz WLAN can transmit simultaneous.
According to KDB447498 D01 General RF Exposure Guidance v06 for Transmitters used in mobile exposure
conditions for simultaneous transmission operations;
∑ of MPE ratios ≤ 1.0

Ant_1 and Ant_2 for 2.4G WLAN
MPE Ant_1 MPE Ant_2 ∑MPE
Modulation Type Limit Results
(mW/cm2) (mW/cm2) ratios
IEEE 802.11n HT20 0.0397 0.0397 0.0794 1.0 PASS
IEEE 802.11n HT40 0.0397 0.0397 0.0794 1.0 PASS

7. Conclusion

The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of
mobile device.

----------------THE END OF REPORT---------------

This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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Document Created: 2019-10-25 17:49:06
Document Modified: 2019-10-25 17:49:06

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