RF Exposure MPE

FCC ID: I88X550NHV2

RF Exposure Info

Download: PDF
FCCID_1010524

FCC ID. : I88X550NHV2 Report No.: TS08090052-EME Page 1 of 6 Maximum Permissible Exposure (MPE) Evaluation Report Report No. : TS08090052-EME Model No. : NBG-460NH, X-550NH, NBG-460N, X-550N Issued Date : Sep. 19, 2008 Applicant: ZyXEL Communications Corporation. 6, Innovation Rd II, Science-Based Industrial Park, Hsinchu, Taiwan Test Method/ FCC 1.1310 and Safety Cord 6 Standard: Test By: Intertek Testing Services Taiwan Ltd. No. 11, Lane 275, Ko-Nan 1 Street, Chia-Tung Li, Shiang-Shan District, Hsinchu City, Taiwan This test report consists of 6 pages in total. It may be duplicated completely for legal use with the allowance of the applicant. It shall not be reproduced except in full, without the written approval of Intertek Laboratory. The test result(s) in this report only applies to the tested sample(s). Report Engineer Sammi Liu Reviewed By Project Engineer Rex Liao Jimmie Liu

FCC ID. : I88X550NHV2 Report No.: TS08090052-EME Page 2 of 6 Table of Contents Summary of Tests ............................................................................................................. 3 1. Introduction .................................................................................................................. 4 2. RF Exposure Limit ....................................................................................................... 4 3. RF Exposure calculations ............................................................................................. 5 4. Test results .................................................................................................................... 6

FCC ID. : I88X550NHV2 Report No.: TS08090052-EME Page 3 of 6 Summary of Tests MPE Evaluation meet FCC OET No. 65: 1997, IEEE C95.1-1999 and IC Safety Code 6 High-gain Wireless N Gigabit Router -Model: NBG-460NH FCC ID: I88X550NHV2 Test Reference Results FCC Guidelines for Human Exposure IEEE C95.1 MPE Evaluation Complies and IC Safety Code 6 The customer confirmed the models listed as below are series model to model NBG-460NH (EUT), the difference between main model and series model are listed as below. Model Number Different NBG-460NH Collocated with 6dBi antenna X-550NH Same as NBG-460NH NBG-460N Collocated with 1.8dBi antenna X-550N Same as NBG-460N

FCC ID. : I88X550NHV2 Report No.: TS08090052-EME Page 4 of 6 1. Introduction The EUT operates in the 2.4GHz ISM band. Due to the EUT (include antenna) at its normal operation distance is at least 20 cm from the human body, the EUT was defined as a Mobile Device. The reason to do the MPE Evaluation is to avoid the RF hazard to human body. The maximum output power and gain of the antenna were used to calculate the limited Power density (S) at 20cm distance away from the product. The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 and Safety Cord 6 are followed. According to 1.1307 (b)(1), systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. 2. RF Exposure Limit For FCC: 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 Strength (mW/cm2) (minutes) (MHz) (V/m) (A/m) (A) Limits for Occupational / Control Exposures 30-300 61.4 0.163 1.0 6 300-1500 - - F/300 6 1500-100,000 - - 5 6 (B) Limits for General Population / Uncontrolled Exposure 30-300 27.5 0.073 0.2 30 300-1500 - - F/1500 30 1500-100,000 - - 1.0 30 F= Frequency in MHz

FCC ID. : I88X550NHV2 Report No.: TS08090052-EME Page 5 of 6 For IC: Exposure Limits for Persons Not Classed As RF and Microwave Exposed Workers (Including the General Public) Frequency Electric Field Magnetic Field Power Density Average Time Range Strength; rms Strength; rms (W/m2) (minutes) (MHz) (V/m) (A/m) 0.003-1 280 2.19 - 6 1-10 280/f 2.19/f - 6 10-30 28 2.19/f - 6 30-300 28 0.073 2* 30 0.5 0.5 300-1500 1.585f 0.0042f F/150 30 1500-15000 61.4 0.163 10 30 15000-150000 61.4 0.163 10 616000/f 1.2 150000-300000 0.158 f 0.5 4.21 × 10-4 f 0.5 6.67 × 10-5 f 616000/f 1.2 * Power density limit is applicable at frequencies greater than 100 MHz. Notes: 1. Frequency, f, is in MHz. 2. A power density of 10W/m2 is equivalent to 1 mW/cm2. 3. A magnetic field strength of 1 A/m corresponds to 1.257 microtesla (µT) or 12.57 milligauss (mG). 3. RF Exposure calculations From §FCC 1.1310 table 1 and §Safety Code 6 table 5, the maximum permissible RF exposure for an uncontrolled environment is 1mW/(cm2) (or 10 W/m2)* * 10 W/m2 = 1mW/ (cm2) Power density (S) is calculated by the following formula: S = (P * G)/4πR2 where, S = Power density (mW/cm2) P = Output power to antenna (mW) R = Distance between radiating structure and observation point (cm) G = Gain of antenna in numeric π = 3.1416 Example: Assume a mobile device operates at 2412MHz and its maximum output power is 50mW, and the maximum gain of antenna is 1 (numeric) /0dBi. then the power density (S) = (50 * 1)/4*π*202 = 0.00995 (mW/cm2) (or = 0.0995 W/m2)

FCC ID. : I88X550NHV2 Report No.: TS08090052-EME Page 6 of 6 4. Test results Test Mode: 802.11b mode Channel Maximum Output power Power density Limit of Channel Frequency antenna gain to antenna power density (MHz) (numeric) (mW) (mW/cm2) (mW/cm2) 1 (lowest) 2412 3.98 298.90 0.236990067 1.0 6 (middle) 2437 3.98 287.00 0.227368420 1.0 11 (highest) 2462 3.98 289.12 0.228944463 1.0 Test Mode: 802.11g mode Channel Maximum Output power Power density Limit of Channel Frequency antenna gain to antenna power density (MHz) (numeric) (mW) (mW/cm2) (mW/cm2) 1 (lowest) 2412 3.98 851.67 0.674109030 1.0 6 (middle) 2437 3.98 963.42 0.763361310 1.0 11 (highest) 2462 3.98 959.21 0.759853984 1.0 Test Mode: 802.11n HT20 mode Channel Maximum Output power Power density Limit of Channel Frequency antenna gain to antenna power density (MHz) (numeric) (mW) (mW/cm2) (mW/cm2) 1 (lowest) 2412 3.98 685.43 0.542912880 1.0 6 (middle) 2437 3.98 968.46 0.766884826 1.0 11 (highest) 2462 3.98 804.49 0.637867015 1.0 Test Mode: 802.11n HT40 mode Channel Maximum Output power Power density Limit of Channel Frequency antenna gain to antenna power density (MHz) (numeric) (mW) (mW/cm2) (mW/cm2) 3 (lowest) 2422 3.98 180.02 0.142472205 1.0 6 (middle) 2437 3.98 384.50 0.304600172 1.0 9 (highest) 2452 3.98 174.94 0.138589442 1.0 The Notice in Installation Manual has been stated as below: While installing and operating this transmitter, the radio frequency exposure limit of 1mW/ (cm2) may be exceeded at distances close to the transmitter. therefore, the user must maintain a minimum distance of 20 cm from the device at all time.


Document Created: 2008-10-02 15:27:37
Document Modified: 2008-10-02 15:27:37
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC