Cover letter describing changes

FCC ID: CB2ACTLHL3

Cover Letter(s)

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FCCID_640523

Johnson Controls, Inc. Automotive Systems Group One Prince Center Holland, MI 49423 March 24, 2005 Federal Communication Commission Equipment Approval Services, P.O. Box 358315 Pittsburgh, PA 15251-5315 Attention: Authorization & Evaluation Division RE: Application for Vehicle Level Certification of Johnson Controls Transmitter under 47 CFR 15.231. FCC ID: CB2ACTLHL3 To whom it may concern, From time to time JCI has found it necessary to tune our Homelink® Universal Garage Door Opener transmitters to the specific vehicles in which they are installed. In previous correspondence with the FCC (attached) it was determined that in-vehicle measurement of fundamental frequencies (at 10 m) was enough to show compliance to Part 15 and that other measurements (harmonics, etc) from 3m bench testing and that this procedure was compatible with ANSI C63.4. During this discussion JCI (formerly Prince Corporation) agreed to inform the commission of when a Homelink® evaluated in this way were moved to a different vehicle platform. (See “vehicle_level.pdf” for details.) In previous submissions around August of 2003 the CB2ACTHL3 Homelink was certified for use in the Acura TL and Acura MDX. The purpose of this submission is to obtain grant for use in the Acura RDX. In the attached report you will find measurement data for transmitter fundamental in the Acura RDX using the same part tested in the Acura TL and MDX. All other test data presented is taken from the August 2003 report and is attached for completeness. As stated in the original grant (Form 731 confirmation #0200587F), the JCI Model CB2ACTLHL3 is part of the Homelink ® III series. Homelink ® III devices are capable of learning garage door opener frequencies and codes from the user’s original transmitter. The device is capable of learning in the range between 288MHz and 420MHz excluding forbidden frequency regions. Johnson Controls Interiors has invested considerable resources into developing our Homelink ® products. For this reason we respectfully request that the following items be held as confidential. • Circuit Block Diagrams • Theory of Operation • Schematics

The Federal Communications Commission will be notified, in writing of any changes in the software/programming of this device that could affect its RF characteristics. Please do not hesitate to contact me with any questions you may have regarding this report. As always we look forward to your timely response. Sincerely, Jeremy P. Bos RF Test Site Manager Johnson Controls Interiors. Tel: (616)394-6076/Fax: (616)394-6100 Email: Jeremy.bos@jci.com


Document Created: 2006-03-24 09:49:28
Document Modified: 2006-03-24 09:49:28
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