LXC-AR5BAP-00048802.11a Access Point

DENSO INTERNATIONAL AMERICA, INC. LA Laboratories 3252 Business Park Drive, Vista, California 92081 Tel: (760) 597-7400 Fax: (760) 597-7500 Date: July 12, 2004 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: We, the undersigned, wish to identify the usage of the DENSO Access Point (“AP”) to aid in the FCC certification process. The usage is associated with FCC ID LXC-AR5BAP-00048. We, the undersigned, hereby identify that a limited number of APs will be supplied to and used by automotive radio professionals for experimental vehicle tests. The automotive professionals are cognizant of RF operation, antenna installation, and wireless testing, particularly in vehicular environments. In addition, some AP tests may be performed in corporate office environments. The AP is not intended for residential use. The AP will be operated over-the-air in the 802.11a mode in the frequency bands from 5.25 GHz to 5.35 GHz, and 5.725 GHz to 5.85 GHz. Operation in other modes and frequency bands associated with 802.11b, 802.11g and turbo modes will be disabled. In addition, all operation will be disabled in the lowest UNII band, from 5.15GHz to 5.25GHz. Sincerely Yours, Roger Berg Vice President DENSO INTERNATIONAL AMERICA, INC. LA Laboratories

4/22/2004 Authorization for DENSO INTERNATIONAL AMERICA, INC. To Whom It May Concern: Atheros Communications, Inc. authorizes DENSO INTERNATIONAL AMERICA, INC. to submit Atheros’ technical documents for the AP48 Access Point design to the FCC as required to obtain Part 15 authorization. We understand DENSO INTERNATIONAL AMERICA, INC. will file for FCC certification using the Atheros design and their own FCCID and branding. We understand the applicant will request that the FCC keep the technical description/theory of operation, schematic, antenna specification and bill of materials from public view. Regards, Michael Green / Manager, Global Product Compliance Atheros Communications Inc.

DENSO INTERNATIONAL AMERICA, INC. LA Laboratories 3252 Business Park Drive Vista, California 92081 Tel: (760) 597-7400 Fax: (760) 597-7500 Date: June 18, 2004 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: We, the undersigned, hereby authorize Compliance Engineering Services, Inc. to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. All acts carried out by Compliance Engineering Service, Inc. on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). This authorization is valid until further written notice from the applicant. Sincerely Yours, Roger W. Berg Vice President, DENSO INTERNATIONAL AMERICA, INC. LA Laboratories

DENSO INTERNATIONAL AMERICA, INC. LA Laboratories 3252 Business Park Drive Vista, California 92081 Tel: (760) 597-7400 Fax: (760) 597-7500 Date: May 25, 2004 Federal Communications Commission Equipment Authorization branch 7435 Oakland Mills Road Columbia, MD 21046 Re: Request for Confidentiality Gentlemen: In reference to the application under FCC ID LXC-AR5BAP-00048 and pursuant to Sections 0.457(d)(l)(ii) and 0.459 of the Commission’s Rules, the Applicant hereby requests confidential treatment of the accompanying information as outlined below: Schematics Block Diagrams and Antenna specification Theory of Operation and User’s Guide These documents contain detailed system and equipment description and related information about the product that DENSO INTERNATIONAL AMERICA, Inc., considers proprietary, confidential, and a custom design and, otherwise, would not release to the public. Since this product is based on a unit designed by Atheros Communications, Inc., from which future technological products will evolve, DENSO INTERNATIONAL AMERICA, Inc., considers that this information would be of benefit to its and Atheros’ competitors, and that disclosure of the information in these documents would give competitors an unfair advantage in the market. Sincerely, Roger Berg Vice President DENSO INTERNATIONAL AMERICA, Inc. LA Laboratories

PROPOSED FCC ID LABEL AND LOCATION DENSO INTERNATIONAL AMERICA, INC. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC ID: LXC-AR5BAP-00048 FCC ID LABEL LOCATION

1.1. 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. 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. LIMITS From §1.1310 Table 1 (B), S = 1.0 mW/cm^2 RESULTS No non-compliance noted: 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. ModePower DensityOutputAntennaMPE LimitPowerGainDistance (mW/cm^2)(dBm)(dBi)(cm) 802.11a1.026.936.7513.62

FCC CFR47 PART 15 SUBPART C CERTIFICATION TEST REPORT FOR 802.11a ACCESS POINT MODEL NUMBER: AP48 FCC ID: LXC-AR5BAP-00048 REPORT NUMBER: 04U2761-2 ISSUE DATE: JULY 9, 2004 Prepared for DENSO INTERNATIONAL AMERICA, INC. 3252 BUSINESS PARK DRIVE VISTA, CA 92081, USA Prepared by COMPLIANCE CERTIFICATION SERVICES 561F MONTEREY ROAD, MORGAN HILL, CA 95037, USA TEL: (408) 463-0885 FAX: (408) 463-0888 REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 2 of 55 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. TABLE OF CONTENTS 1. TEST RESULT CERTIFICATION.................................................................................................. 3 2. EUT DESCRIPTION.......................................................................................................................... 4 3. TEST METHODOLOGY .................................................................................................................. 5 4. FACILITIES AND ACCREDITATION .......................................................................................... 5 5. CALIBRATION AND UNCERTAINTY.......................................................................................... 6 5.1. MEASURING INSTRUMENT CALIBRATION ............................................................................. 6 5.2. MEASUREMENT UNCERTAINTY ............................................................................................... 6 5.3. TEST AND MEASUREMENT EQUIPMENT................................................................................ 7 6. SETUP OF EQUIPMENT UNDER TEST ....................................................................................... 8 7. APPLICABLE LIMITS AND TEST RESULTS ........................................................................... 10 7.1. 6 dB BANDWIDTH ..................................................................................................................... 10 7.2. 99% BANDWIDTH ..................................................................................................................... 14 7.3. PEAK OUTPUT POWER............................................................................................................ 18 7.4. AVERAGE POWER..................................................................................................................... 23 7.5. PEAK POWER SPECTRAL DENSITY ....................................................................................... 24 7.6. CONDUCTED SPURIOUS EMISSIONS.................................................................................... 28 7.7. RADIATED EMISSIONS.............................................................................................................35 7.7.1. TRANSMITTER RADIATED SPURIOUS EMISSIONS ................................................. 35 7.7.2. TRANSMITTER RADIATED EMISSIONS ABOVE 1 GHZ .......................................... 38 7.7.3. WORST-CASE TRANSMITTER RADIATED EMISSIONS BELOW 1 GHz ................ 39 7.7.4. WORST-CASE DIGITAL DEVICE RADIATED EMISSIONS ....................................... 43 7.8. POWERLINE CONDUCTED EMISSIONS ................................................................................ 47 8. SETUP PHOTOS .............................................................................................................................. 51 REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 3 of 55 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. 1. TEST RESULT CERTIFICATION COMPANY NAME: Denso International America, Inc. 3252 Business Park Drive Vista, CA, 92081, USA EUT DESCRIPTION: 802.11a Access Point MODEL: AP48 DATE TESTED: JUNE 21 - 24, 2004 APPLICABLE STANDARDS STANDARD TEST RESULTS FCC PART 15 SUBPART B NO NON-COMPLIANCE NOTED FCC PART 15 SUBPART C NO NON-COMPLIANCE NOTED Compliance Certification Services, Inc. tested the above equipment in accordance with the requirements set forth in the above standards. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. Note: This document reports conditions under which testing was conducted and results of tests performed. This document may not be altered or revised in any way unless done so by Compliance Certification Services and all revisions are duly noted in the revisions section. Any alteration of this document not carried out by Compliance Certification Services will constitute fraud and shall nullify the document. Approved & Released For CCS By: Tested By: MIKE HECKROTTE BEN DU ENGINEERING MANAGER EMC ENGINEER COMPLIANCE CERTIFICATION SERVICES COMPLIANCE CERTIFICATION SERVICES REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 4 of 55 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. 2. EUT DESCRIPTION The EUT is an 802.11a transceiver integrated with an access point, ope…

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REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 51 of 55 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. 8. SETUP PHOTOS ANTENNA PORT CONDUCTED RF MEASUREMENT SETUP ANTENNA PORT CONDUCTED PHOTO REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 52 of 55 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. RADIATED RF MEASUREMENT SETUP RADIATED FRONT PHOTO REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 53 of 55 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. RADIATED BACK PHOTO REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 54 of 55 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. POWERLINE CONDUCTED EMISSIONS MEASUREMENT SETUP LINE CONDUCTED FRONT PHOTO REPORT NO: 04U2761-2 DATE: JULY 9, 2004 EUT: 802.11a Access Point FCC ID: LXC-AR5BAP-00048 Page 55 of 55 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. END OF REPORT LINE CONDUCTED BACK PHOTO