RF Exposure Report

FCC ID: LDK102054E

RF Exposure Info

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FCCID_645501

REPORT NO: 04U2603-1 DATE: AUGUST 30, 2004 EUT: 802.11 a/b/g ACCESS POINT FCC ID: LDK102054 SCOPE OF DOCUMENT Compliance Certification Services hereby gives written permission for the following partial reproduction and extract of the MPE sections from report number 04U2603-1. MIKE HECKROTTE ENGINEERING MANAGER COMPLIANCE CERTIFICATION SERVICES COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS. This document may be altered or revised by Compliance Certification Services personnel only, and shall be noted in the revision section of the document.

REPORT NO: 04U2603-1 DATE: AUGUST 30, 2004 EUT: 802.11 a/b/g ACCESS POINT FCC ID: LDK102054 6.4 MAXIMUM PERMISSIBLE EXPOSURE LIMITS §1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of §2.1093 of this chapter. COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS. This document may be altered or revised by Compliance Certification Services personnel only, and shall be noted in the revision section of the document.

REPORT NO: 04U2603-1 DATE: AUGUST 30, 2004 EUT: 802.11 a/b/g ACCESS POINT FCC ID: LDK102054 CALCULATIONS Given E = √ (30 * P * G) / d and S = E ^ 2 / 3770 where E = Field Strength in Volts/meter P = Power in Watts G = Numeric antenna gain d = Distance in meters S = Power Density in milliwatts/square centimeter Combining equations and rearranging the terms to express the distance as a function of the remaining variables yields: d = √ ((30 * P * G) / (3770 * S)) Changing to units of Power to mW and Distance to cm, using: P (mW) = P (W) / 1000 and d (cm) =100 * d (m) yields d = 100 * √ ((30 * (P / 1000) * G) / (3770 * S)) d = 0.282 * √ (P * G / S) where d = distance in cm P = Power in mW G = Numeric antenna gain S = Power Density in mW/cm^2 Substituting the logarithmic form of power and gain using: P (mW) = 10 ^ (P (dBm) / 10) and G (numeric) = 10 ^ (G (dBi) / 10) yields d = 0.282 * 10 ^ ((P + G) / 20) / √ S Equation (1) where d = MPE distance in cm P = Power in dBm G = Antenna Gain in dBi S = Power Density Limit in mW/cm^2 Equation (1) and the measured peak power is used to calculate the MPE distance. COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS. This document may be altered or revised by Compliance Certification Services personnel only, and shall be noted in the revision section of the document.

REPORT NO: 04U2603-1 DATE: AUGUST 30, 2004 EUT: 802.11 a/b/g ACCESS POINT FCC ID: LDK102054 LIMITS From §1.1310 Table 1 (B), S = 1.0 mW/cm^2 RESULTS No non-compliance noted: Mode Power Density Output Antenna MPE Limit Power Gain Distance (mW/cm^2) (dBm) (dBi) (cm) 802.11b 1.0 25.64 4.00 8.56 802.11g 1.0 24.82 4.00 7.78 NOTE: For mobile or fixed location transmitters, the minimum separation distance is 20 cm, even if calculations indicate that the MPE distance would be less. COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS. This document may be altered or revised by Compliance Certification Services personnel only, and shall be noted in the revision section of the document.

REPORT NO: 04U2603-1 DATE: AUGUST 30, 2004 EUT: 802.11 a/b/g ACCESS POINT FCC ID: LDK102054 6.8 CO-LOCATED MAXIMUM PERMISSIBLE EXPOSURE §1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of §2.1093 of this chapter. COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS. This document may be altered or revised by Compliance Certification Services personnel only, and shall be noted in the revision section of the document.

REPORT NO: 04U2603-1 DATE: AUGUST 30, 2004 EUT: 802.11 a/b/g ACCESS POINT FCC ID: LDK102054 CALCULATIONS Given E = √ (30 * P * G) / d and S = E ^ 2 / 3770 where E = Field Strength in Volts/meter P = Power in Watts G = Numeric antenna gain d = Distance in meters S = Power Density in milliwatts/square centimeter Combining equations and rearranging the terms to express the distance as a function of the remaining variables yields: d = √ ((30 * P * G) / (3770 * S)) Changing to units of Power to mW and Distance to cm, using: P (mW) = P (W) / 1000 and d (cm) =100 * d (m) yields d = 100 * √ ((30 * (P / 1000) * G) / (3770 * S)) d = 0.282 * √ (P * G / S) where d = distance in cm P = Power in mW G = Numeric antenna gain S = Power Density in mW/cm^2 For multiple colocated transmitters operating simultaneously the total power density can be calculated by summing the Power * Gain product of each transmitter. yields d = 0.282 * √ ((P1 * G1) + (P2 * G2) + ... + (Pn * Pn)) / S) Equation (1) where d = distance in cm Px = Power of transmitter x in mW Gx = Numeric gain of antenna x S = Power Density in mW/cm^2 COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS. This document may be altered or revised by Compliance Certification Services personnel only, and shall be noted in the revision section of the document.

REPORT NO: 04U2603-1 DATE: AUGUST 30, 2004 EUT: 802.11 a/b/g ACCESS POINT FCC ID: LDK102054 In the table below, Power and Gain are entered in units of dBm and dBi respectively, then these are converted to their linear forms prior to the summation function. The conversions from the logarithmic form of power and gain are made using: P (mW) = 10 ^ (P (dBm) / 10) and Equation (2) G (numeric) = 10 ^ (G (dBi) / 10) Equation (3) Equations (1), (2) and (3) and the measured peak powers are used to calculate the MPE distance. LIMITS From §1.1310 Table 1 (B), S = 1.0 mW/cm^2 RESULTS No non-compliance noted: Mode Power Density Output Antenna MPE Limit Power Gain Distance (mW/cm^2) (dBm) (dBi) (cm) 802.11g 25.64 4.00 802.11a 17.31 4.00 Combined 1.0 9.16 NOTE: For mobile or fixed location transmitters, the minimum separation distance is 20 cm, even if calculations indicate that the MPE distance would be less. COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS. This document may be altered or revised by Compliance Certification Services personnel only, and shall be noted in the revision section of the document.


Document Created: 2006-04-10 07:33:14
Document Modified: 2006-04-10 07:33:14
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