KOBGT04ACar Keyless Entry Transmitter

Re: Certification for Lear RFA-04 Transmitter Model: RFA-04 FCC ID: KOBGT04A IC: 3521A-T04A USER'S MANUAL INFORMATION (PRELIMINARY) The User's Manual is in preparation. The following material will be contained in the manual: FCC ID: KOBGT04A IC: 3521A-T04A This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada. 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. WARNING: Changes or modifications not expressively approved by the party responsible for compliance could void the user's authority to operate the equipment. The term “IC:” before the radio certification number only signifies that Industry Canada technical specifications were met.

Re: Certification for Lear RFA-04 Transmitter Model: RFA-04 FCC ID: KOBGT04A IC: 3521A-T04A REQUEST FOR CONFIDENTIALITY Pursuant to 47 CRF 0.459, Lear requests that a part of the subject application be held confidential. This comprises Exhibits (5) Schematics (10) Parts List (Part of Exhibit only) Lear has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. If there are any questions regarding this request, please contact me at the above address or call 734-483-4211, fax 734-647-2106 or e-mail [email protected]. Sincerely, Valdis V. Liepa Research Scientist University of Michigan April 9, 2003 Re: Certification for Lear RFA-04 Transmitter Model: RFA-04 FCC ID: KOBGT04A IC: 3521A-T04A STATEMENT OF MODIFICATIONS There were no modifications made to the DUT by this test laboratory. (Also see Section 3.1 of the attached Test Report). _____________________ Valdis V. Liepa Research Scientist Re: Certification for Lear RFA-04 Transmitter Model: RFA-04 FCC ID: KOBGT04A IC: 3521A-T04A GENERAL PRODUCT INFORMATION The device, for which certification is pursued, has been designed by: Lear Corporation 5200 Auto Club Drive Dearborn, MI 48126 Tom Tang Tel: (313) 593 - 9934 Fax: (313) 240 - 3062 It will be manufactured by: Lear Corporation 5100 West Waters Avenue Tampa, FL 33634 Tom Tang Tel: (313) 593 - 9934 Fax: (313) 240 - 3062 Canadian Contact: General Motors of Canada 1908 Colonel Sam Drive Oshawa, Ontario Canada, L1H 8P7 Tom Odell Tel: (905) 644 - 7103

5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Transmitter, RFA-04 FCC ID: KOBGT04A CANADA: 3521A-T04A Block Circuit Diagram The circuit is actuated when one of the of seven maximum buttons are depressed. The switch operation “wake’s up” the encoder, and the internal clock circuit turns on. The encoder generates data internally based on the timing of the clock oscillator. The data is outputted from the encoder to the 315 MHz, SAWR (Surface Acoustic Wave Resonator) stabilized oscillator. This oscillator is then turned on and off at the data rate outputted from the encoder. The oscillator radiates out through a PCB trace antenna. 315 315 MHz SAWR Oscillator Encoder with integratedclock oscillator Buttons PCB trace Antenna

April 9, 2003 American Telecommunications Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 RE: Certification Application FCC ID: KOBGT04A Please find enclosed application materials for certification of Lear RFA-04 Transmitter. Note: 1) portions of this submittal are filed Confidential 2) a list of the modifications made is provided in Attestations. If there are any questions regarding the application or testing performed, please contact me at the above address or call 734-483-4211, fax 734-647-2106, or e-mail [email protected]. Sincerely, Valdis V. Liepa Research Scientist

April 9, 2003 Federal Communications Commission Equipment Approval Services P.O. Box 358315 Pittsburgh, PA 15251-5315 Re: Certification for Lear RFA-04 Transmitter Model: RFA-04 FCC ID: KOBGT04A IC: 3521A-T04A Please find enclosed application materials for certification of Lear RFA-04 Transmitter. We tested it and found it to comply with FCC Part 15. If there are any questions regarding the application or testing performed, please contact me at the above address or call 734-483-4211, fax 734-647-2106, or e-mail [email protected]. Sincerely, Valdis V. Liepa Research Scientist April 9, 2003 Certification and Engineering Bureau Industry Canada 3701 Carling Avenue, Bldg. 94 Ottawa, Ontario K2H 8S2 Re: Certification for Lear RFA-04 Transmitter Model: RFA-04 FCC ID: KOBGT04A IC: 3521A-T04A Please find enclosed application materials for certification of Lear RFA-04 Transmitter. We tested the device and found it to comply with RSS-210. The product is identified by: IC: 3521A-T04A If there are any questions, suggestions, etc., regarding the application or testing performed, please contact me at the above address or call 734-483-4211, fax 734-647- 2106; e-mail: [email protected]. Sincerely, Valdis V. Liepa Research Scientist

5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Transmitter, RFA-04 FCC ID: KOBGT04A CANADA: 3521A-T04A Component Layout Figure 1. Bottom side component layout of GM RFA04 Transmitter Note: The GM RFA04 transmitter does not have components placed on the topside of the board. 5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Transmitter Model: RFA-04 FCC ID: KOBGT04A IC: 3521A-T04A The following statement will be printed in the User’s Instruction Manual: This device complies with part 15 of the FCC Rules and with RSS-210 of Industry Canada. 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: KOBGT04A IC: 3521A-T04A The letters “IC” have no other meaning or purpose than to identify the Industry Canada certification number/registration number. WARNING: Changes or modifications not expressively approved by the party responsible for compliance could void the user’s authority to operate the equipment. The FCC and IC identification numbers for the transmitter are located inside the battery compartment.

5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Transmitter, RFA-04 FCC ID: KOBGT04A CANADA: 3521A-T04A DESCRIPTION OF OPERATION GENERAL DESCRIPTION The product for which certification is pursued will be manufactured for General Motors Corporation by Lear Corporation for automotive applications. This 315 MHz transmitter works in conjunction with a receiver that is mounted in the vehicle. There are two receivers possible, a Super-regenerative or heterodyne. The transmitter is a 3- volt, single cell battery operated fob type that is carried by the user. It is part of a keyless entry system and can be used to perform certain functions such as lock and unlock the driver and passenger doors, open the trunk, etc... depending on how the receiver module in the vehicle is programmed. There can be 2 to 7 button versions of this transmitter. The only differences between these units are the number of buttons used, the printing on the buttons, and the GM/LEAR part number stamped on the back. The PCB is the same for all versions. Electrically, all six units are identical except diode population for versions with more than 4 button inputs. Each additional button over 4 requires placing additional 2 diodes. Also, there are two types of receivers this transmitter will be used with, super-regenerative and heterodyne. This requires a unique encoder for each with slightly unique software. The two piece exterior housing is injection molded plastic with GM/LEAR # and programming instruction’s molded into the back of the housing. The FCC/IC numbers will be located on the printed circuit board. TECHNICAL DESCRIPTION When the buttons are depressed, the encoder IC will power up and generate the proper data code which can only be recognized by a matched receiver. The code is carried by 315 MHz carrier with AM OOK (on-off keying) modulation and radiated by a printed circuit board antenna. The data code is of a pulse width modulation format to express bits “0” and “1”. The encoder clock controls the data code period, which is a RC oscillator type that is integrated into the encoder. The antenna is a loop PCB trace. The 315 MHz transmit frequency is generated by a SAWR (Surface Acoustic Wave Resonator) stabilized, Colpits oscillator. Frequency tolerance is better than 315 MHz, +/- 100 kHz. NAME AND ADDRESS OF MANUFACTURER Lear Corporation 5200 Auto Club Drive Dearborn, Michigan 48126 And 5100 West Waters Ave. Tampa, FL 33634

Appendix: DUT on OATS Appendix: Close-up on the DUT on OATS 13

Appendix: DUT on OATS Appendix: Close-up on the DUT on OATS 13