RF exposure info

FCC ID: H8NDWG855

RF Exposure Info

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FCCID_698619

Report No. 068H025-RF-US-Exp RF Exposure Evaluation declaration Product Name ： WiFi EMTA Cable Modem Model No. ： DWG855xx FCC ID. ： H8NDWG855 Applicant : ASKEY COMPUTER CORP. Address : 10F, NO.119, CHIENKANG RD., CHUNG-HO, TAIPEI, TAIWAN, R.O.C. Date of Receipt : 2006/08/04 Date of Declaration : 2006/08/14 Report No. : 068H025-RF-US-Exp The declaration results relate only to the samples calculated. The declaration shall not be reproduced except in full without the written approval of QuieTek Corporation. Page: 1 of 4 Version:1.0

Report No. 068H025-RF-US-Exp 1. RF Exposure Evaluation 1.1. Limits 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) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Frequency Range Electric Field Magnetic Field Power Density Average Time 2 (MHz) Strength (V/m) Strength (A/m) (mW/cm ) (Minutes) (A) Limits for Occupational/ Control Exposures 300-1500 -- -- F/300 6 1500-100,000 -- -- 5 6 (B) Limits for General Population/ Uncontrolled Exposures 300-1500 -- -- F/1500 6 1500-100,000 -- -- 1 30 F= Frequency in MHz 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 Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. 1.2. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. The temperature and related humidity: 18℃and 78％ RH. Page: 2 of 4 Version:1.0

Report No. 068H025-RF-US-Exp 1.3. Test Result of RF Exposure Evaluation Product WiFi EMTA Cable Modem Test Mode Mode 1: Transmit Test Condition RF Exposure Evaluation Antenna Gain Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2dBi in linear scale. Output Power Into Antenna & RF Exposure Evaluation Distance: IEEE 802.11b Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 1 2412.00 136.1445 0.0410 6 2437.00 160.3245 0.0483 11 2462.00 141.9058 0.0427 The power density Pd (4th column) at a distance of 20 cm calculated from the Friis transmission formula is far below the limit of 1 mW/cm2. Page: 3 of 4 Version:1.0

Report No. 068H025-RF-US-Exp Product WiFi EMTA Cable Modem Test Mode Mode 1: Transmit Test Condition RF Exposure Evaluation Antenna Gain Antenna Gain: The maximum Gain measured in fully anechoic chamber is 1.8dBi in linear scale. Output Power Into Antenna & RF Exposure Evaluation Distance: IEEE 802.11g Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 1 2412.00 163.3052 0.0492 6 2437.00 174.1807 0.0524 11 2462.00 166.3413 0.0501 The power density Pd (4th column) at a distance of 20 cm calculated from the Friis transmission formula is far below the limit of 1 mW/cm2. Page: 4 of 4 Version:1.0


Document Created: 2006-08-18 11:38:11
Document Modified: 2006-08-18 11:38:11
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