MRXGMX295FMRemote Tire Pressure Monitoring Transmitter

Re: Certification for Schrader GMX295FM Transmitter Model: GMX295FM FCC ID: MRXGMX295FM IC: 2546A-GMX295FM USER'S MANUAL INFORMATION (PRELIMINARY) The User's Manual is in preparation. The following material will be contained in the manual: FCC ID: MRXGMX295FM IC: 2546A-GMX295FM 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 Schrader GMX295FM Transmitter Model: GMX295FM FCC ID: MRXGMX295FM IC: 2546A-GMX295FM POWER OF ATTORNEY A letter granting Valdis V. Liepa the Power of Attorney is on file and can be provided when so requested. Re: Certification for Schrader GMX295FM Transmitter Model: GMX295FM FCC ID: MRXGMX295FM IC: 2546A-GMX295FM REQUEST FOR CONFIDENTIALITY Pursuant to 47 CRF 0.459, Schrader requests that a part of the subject application be held confidential. This comprises Exhibits (5) Schematics (10) Parts List (Part of Exhibit only) Schrader 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 February 12, 2004 Re: Certification for Schrader GMX295FM Transmitter Model: GMX295FM FCC ID: MRXGMX295FM IC: 2546A-GMX295FM 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 Schrader GMX295FM Transmitter Model: GMX295FM FCC ID: MRXGMX295FM IC: 2546A-GMX295FM GENERAL PRODUCT INFORMATION The device, for which certification is pursued, has been designed by: Schrader Electronics Limited 11, Technology Park, Belfast Road, Antrim BT41 1QS, Northern Ireland David Lynn Tel: (44) 028 94 482115 Fax: (44) 028 94 468440 It will be manufactured by: Schrader Electronics Limited 11 Technology Park, Belfast Road Antrim BT41 1QS, Northern Ireland David Lynn Tel: (44) 028 94 482115 Fax: (44) 028 94 468440 Canadian Contact: Gates Rubber Company, 3303 St. Etienne Boulevard, Windsor, Ontario. N8W 5B1 Canada Rick Gatti - 313 962 1711

RF CIRCUIT ASIC 3V LITHIUM BATTERY VALVE LEARN PRESSURE SENSOR

February 12, 2004 American Telecommunications Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 RE: Certification Application FCC ID: MRXGMX295FM Please find enclosed application materials for certification of Schrader GMX295FM 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

February 12, 2004 Federal Communications Commission Equipment Approval Services P.O. Box 358315 Pittsburgh, PA 15251-5315 Re: Certification for Schrader GMX295FM Transmitter Model: GMX295FM FCC ID: MRXGMX295FM IC: 2546A-GMX295FM Please find enclosed application materials for certification of Schrader GMX295FM 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 February 12, 2004 Certification and Engineering Bureau Industry Canada 3701 Carling Avenue, Bldg. 94 Ottawa, Ontario K2H 8S2 Re: Certification for Schrader GMX295FM Transmitter Model: GMX295FM FCC ID: MRXGMX295FM IC: 2546A-GMX295FM Please find enclosed application materials for certification of Schrader GMX295FM Transmitter. We tested the device and found it to comply with RSS-210. The product is identified by: IC: 2546A-GMX295FM 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

Technical Description of the transmitter type designation : 25758220 (GMX295 Domestic – 315MHz FM) Brief Description A block diagram of the RTPMS is shown in figure 1. The transmitter has the following sections: - RF circuit - Pressure sensor - roll switch - Transponder Coil (125kHz LF Learn Switch) - ASIC The system has been developed to monitor a vehicle's tyre pressures whilst driving or stationary. An electronic unit inside each tyre, (referred to as the RTPMS transmitter) mounted to the valve stem, periodically measures actual tyre pressure. By means of RF communication, this pressure information is transmitted to a receiver/decoder which is fitted in the car. The tire pressure value is detected by the ASIC (Application Specific Integrated Circuit) via a pressure sensor. The data is transmitted using a Manchester coding protocol at a maximum data rate of 4.096 Kbits/sec. The clock generator for the ASIC is crystal controlled. The block transmission format is shown in figure 2. The valve stem is part of the transmitting antenna. while the vehicle is parked (Stationary Mode), there is no transmission. when the vehicle is moving (roll switch closed) the RTPMS transmit each minute 8 words as shown in figure 2. The transmitter will remain in drive mode for a period of time known as the Service Period after the vehicle comes to rest (roll switch open). After the Service Period time has elapsed the transmitter returns to Stationary Mode. The RTPMS uses a Transponder Coil, which when activated with 125kHz LF, will ‘LEARN’ the ID code to the receiver/decoder in the production line of the vehicles.

Use Modes Mode of Operation Explanation Frequency of Transmission Consumer Normal Transmitter in normal operation – wheel is rotating. 8 packets every minute Consumer Stationary Transmitter enters mode when wheel is not rotating. Vehicle is stopped. 8 packets every 60 minutes. Consumer Alert Transmitter enters this mode when a 0.8PSi change in pressure is detected. 8 Packets every 15 seconds while pressure continues to change. Factory/Setup Normal Activated with 125 kHz signal 40 packets per initiation.