MRX433MBRX1TPMS Receiver

Re: Certification for Schrader Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 USER'S MANUAL INFORMATION (PRELIMINARY) The User's Manual is in preparation. The following material will be contained in the manual: FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 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.

Page 2 of 3 RF Section LO : 423.3 MHz 2 x LO: 846.6 MHz Xtal: 13.225625 MHz CAN Tranceiver Micro Decoupling Connector I/O Xtal: 4.00 MHz

February 20, 2006 Federal Communications Commission Equipment Approval Services P.O. Box 358315 Pittsburgh, PA 15251-5315 Re: Certification for Schrader Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 Please find enclosed application materials for certification of Schrader A0025405345, A0025405445, A0025408045 Receiver. 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 20, 2006 Certification and Engineering Bureau Industry Canada 3701 Carling Avenue, Bldg. 94 Ottawa, Ontario K2H 8S2 Re: Certification for Schrader Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 Please find enclosed application materials for certification of Schrader A0025405345, A0025405445, A0025408045 Receiver. We tested the device and found it to comply with RSS-GEN/102/210. The product is identified by: IC: 2548A-433MBRX1 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

Re: Certification for Schrader Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 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 Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 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 20, 2006 Re: Certification for Schrader Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 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 Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 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 Adrian Condon Tel: +44 (0) 28 9448 3073 Fax: +44 (0) 28 9446 8440 It will be manufactured by: Schrader Electronics Limited 11 Technology Park, Belfast Road Antrim BT41 1QS, Northern Ireland Jim Newport Tel: 011-44-2894-48-2066 Fax: 011-44-1849-46-8440 Canadian Contact: Gates Rubber Company, 3303 St. Etienne Boulevard, Windsor, Ontario. N8W 5B1 Canada Rick Gatti - 313 962 1711

February 20, 2006 American Telecommunications Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 RE: Certification Application FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 Model(s): A0025405345, A0025405445, A0025408045 Please find enclosed application materials for certification of Schrader A0025405345, A0025405445, A0025408045 Receiver. 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

DUT with Harness DUT (top) DUT (bottom)

ID Label Location

DUT apart (top) DUT apart (bottom) PCB (top) High-Speed PCB ( bottom ) High Speed PCB (top) Low Speed PCB (bottom) Low Speed

Technical Description of the Mercedes TPMS (Tire Pressure Monitoring System) ECU Brief Description A block diagram of the RTPMS is shown in figure 1. The ECU (Electronic Control Unit) has the following sections: - RF circuit - CAN tranceiver - Microprocessor - Power Decoupling The system has been developed to monitor a vehicle's tyre pressures. 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 the ECU (receiver) which is fitted in the car. The ECU filters this RF in the RF section and decodes the pressure information via the microprocessor. The Power Decoupling section is used to protect the ECU against transients etc on the VBat ECU inputs. The CAN section is an interface unit for the CAN bus on the car and out ECU.

University of Michigan Radiation Laboratory FCC Part 15, IC RSS-210/Gen - Test Report No. 415031-278 Page 1 of 9 The University of Michigan Radiation Laboratory 3228 EECS Building Ann Arbor, MI 48109-2122 Tel: (734) 764-0500 Measured Radio Frequency Emissions From Schrader Electronics Limited Receiver Model(s): A0025405345, A0025405445, and A0025408045 Report No. 415031-278 February 17, 2006 Copyright © 2006 For: Schrader 11, Technology Park, Belfast Road, Antrim BT41 1QS, Northern Ireland Contact: Adrian Condon Tel: +44 (0) 28 9448 3073 Fax: +44 (0) 28 9446 8440 PO: Verbal Tests supervised by: Measurements made by: Report approved by: _____________________ Valdis V. Liepa Valdis V. Liepa Research Scientist Summary Tests for compliance with FCC Regulations Part 15, Subpart B, and Industry Canada RSS-210/GEN, were performed on Schrader Electronics Limited models A0025405345, A0025405445, and A0025408045. This device is subject to the Rules and Regulations as a Receiver. As a Digital Device it is exempt, but such measurements were made to assess the receiver's overall emissions. In testing completed on February 22, 2005, the device tested in the worst case met the allowed Class B specifications for radiated emissions by 21.2 dB (see p. 6). The conducted emissions tests do not apply, since the device is powered from a 12 V dc system. University of Michigan Radiation Laboratory FCC Part 15, IC RSS-210/Gen - Test Report No. 415031-278 Page 2 of 9 1. Introduction Schrader Electronics Limited models A0025405345, A0025405445, and A0025408045 was tested for compliance with FCC Regulations, Part 15, adopted under Docket 87-389, April 18, 1989, and with Industry Canada RSS-210, Issue 6 and RSS-Gen, Issue 1, September, 2005. The tests were performed at the University of Michigan Radiation Laboratory Willow Run Test Range following the procedures described in ANSI C63.4-2003 "Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz". The Site description and attenuation characteristics of the Open Site facility are on file with FCC Laboratory, Columbia, Maryland (FCC Reg. No: 91050) and with Industry Canada, Ottawa, ON (File Ref. No: IC 2057). 2. Test Procedure and Equipment Used The pertinent test equipment commonly used in our facility for measurements is listed in Table 2.1 below. The middle column identifies the specific equipment used in these tests. Table 2.1 Test Equipment. Test Instrument Eqpt. Used Manufacturer/Model Spectrum Analyzer (0.1-1500 MHz) Hewlett-Packard, 182T/8558B Spectrum Analyzer (9kHz-22GHz) X Hewlett-Packard 8593A SN: 3107A01358 Spectrum Analyzer (9kHz-26GHz) X Hewlett-Packard 8593E, SN: 3412A01131 Spectrum Analyzer (9kHz-26GHz) Hewlett-Packard 8563E, SN: 3310A01174 Spectrum Analyzer (9kHz-40GHz) Hewlett-Packard 8564E, SN: 3745A01031 Power Meter Hewlett-Packard, 432A Power Meter Anritsu, ML4803A/MP Harmonic Mixer (26-40 GHz) Hewlett-Packard 11970A, SN: 3003A08327 Harmonic Mixer (40-60 GHz) Hewlett-Packard 11970U, SN: 2332A00500 Harmonic Mixer (75-110 GHz) Hewlett-Packard 11970W, SN: 2521A00179 Harmonic Mixer (140-220 GHz) Pacific Millimeter Prod., GMA, SN: 26 S-Band Std. Gain Horn S/A, Model SGH-2.6 C-Band Std. Gain Horn University of Michigan, NRL design XN-Band Std. Gain Horn University of Michigan, NRL design X-Band Std. Gain Horn S/A, Model 12-8.2 X-band horn (8.2- 12.4 GHz) Narda 640 X-band horn (8.2- 12.4 GHz) Scientific Atlanta , 12-8.2, SN: 730 K-band horn (18-26.5 GHz) FXR, Inc., K638KF Ka-band horn (26.5-40 GHz) FXR, Inc., U638A U-band horn (40-60 GHz) Custom Microwave, HO19 W-band horn(75-110 GHz) Custom Microwave, HO10 G-band horn (140-220 GHz) Custom Microwave, HO5R Bicone Antenna (30-250 MHz) X University of Michigan, RLBC-1 Bicone Antenna (200-1000 MHz) X University of Michigan, RLBC-2 Dipole Antenna Set (30-1000 MHz) X University of Michigan, RLDP-1,-2,-3 Dipole Antenna Set (30-1000 MHz) EMCO 2131C, SN: 992 Active Rod Antenna (30 Hz-50 MHz) EMCO 3301B, SN: 3223 Active Loop Antenna (30 Hz-50 MHz) EMCO 6502, SN:2855 Ridge-horn Antenna (300-5000 MHz) X University of Michigan Amplifier (5-1000 MHz) X Avantak, A11-1, A25-1S Amplifier (5-4500 MHz) X Avantak Amplifier (4.5-13 GHz) Avantek, AFT-12665 Amplifier (6-16 GHz) Trek Amplifier (16-26 GHz) Avantek LISN Box University of Michigan Signal Generator X Hewlett-Packard 8657B University of Michigan Radiation Laboratory FCC Part 15, IC RSS-210/Gen - Test Report No. 415031-278 Page 3 of 9 3. Configuration and Identification of Device Under Test The DUT is a 433.92 MHz superheterodyne receiver, with LO at 423.3 MHz mixed down from 2 x LO at 846.6 MHz on chip. It is designed for onboard automobile security/convenience applications, and as such, it is powered from an automotive 12 V dc source. It is housed in a plastic case approximately 3.5 by 2 by 1 inches. Antenna is integral, consisting of a bent wire mounted to the PCB and protruding from the case. For testing, a generic harness was provided by the manufacturer. In the receiver digital section, the decoding, signal processing, etc. are performed by a microprocessor timed by an 4.0 MHz crystal. The DUT was designed by Schrader, 11, Technology Park, Belfast Road,, Antrim BT41 1QS, Northern Ireland. It is identified as: Schrader Receiver Model(s): A0025405345, A0025405445, and A0025408045 FCC ID: MRX433MBRX1 IC: 2548A-433MBRX1 All three modules contain the same RF components, differing only in the population of the digital communictions circuitry. Models A0025405445 and A0025408045 are identical and use higher speed digital communication circuitry. Model A0025405345 is populated with lower speed digital communiction circuitry. 3.1 Modifications Made There were no modifications made to the DUT by this laboratory. 4. Emission Limits The DUT tested falls under Part 15, Subpart B, "Unintentional Radiators". The pertinent test frequencies, with corresponding emission limits, are given in Tables 4.1 …

Text truncated - open the document above for the full version.

DUT on OATS DUT on OATS (close-up)