Exhibit B Operational Description per 2 1033 b4

FCC ID: GQ4-65T

Operational Description

Download: PDF
FCCID_1999654

TRW Automotive April 5, 2013 Automotive Electronics 24175 Research Dr. Farmington Hills, MI 48335-2642 Tel 248.478.7210 Fax 248.699.4241 Model #: 225816-122, 225816-131 GENERAL DESCRIPTION This transmitter is a transmitter device with tire valve, which is mounted in the valve hole of the wheel rim and transmits the pressure and temperature inside the tire, the battery voltage of the transmitter, and the tire identification code (ID) at normal and abnormal condition with the radio wave (RF) that conforms to the used area. The transmitter device also transmits rotation position and time information that is used by an RF receiver in determining the location of the transmitter on a vehicle. In addition, this device has a countermeasure function such as the random delay of transmission time so that the RF signal from each tire will not interfere due to the simultaneous transmission. The transmitter device also has a Low Frequency (LF) receiver. This receiver supports Low Frequency (LF) magnetic field communications allowing the changing of measurement/monitoring states of the transmitter by commands sent via the TPM diagnostic tool. The RF signal operates at 433.92MHz and uses FSK Manchester code modulation and crystal based PLL circuit for oscillation. 225816-122 and 225816-131 transmits 8 RF packets every 60 seconds in normal operation. PRINCIPLES OF CIRCUIT OPERATION The sensor incorporates an ASIC to measure the parameters within the tire. The ASIC sends the measured data in digital pulses. The digital data is frequency modulated. The transmitted signal uses Frequency Shift Keying (FSK). The worst case frequency shift of the carrier is 433.85 MHz for the low frequency and 434.000 Hz for the high frequency shift. The receiver bandwidth must be wide enough to pass the transmitter worst case frequency shifts. Legal name here

Description of Operations Mode of Operation Explanation Frequency of Transmission 4 words when activation occurs Storage Mode No transmission. Measures temperature & pressure. with TPM diagnostic tool Measures temperature, pressure, and motion. Enters this mode/state when 1. Pressure goes above pressure threshold in 4 words when activation occurs Sleep State Storage Mode or with TPM diagnostic tool 2. No motion is detected for 15 minutes in Normal Mode/Rest State.  8 Local Z words every 12-16 seconds, with wheel Measures temperature, pressure, and motion. Localization rotation data. Transmits periodically. Enters this state when  4 words when activation motion is detected in Sleep State. occurs with TPM diagnostic tool  8 pressure/temperature data Measures temperature, pressure, & motion. / words every 60 seconds Transmits periodically. Enters this state when: Normal State  4 words when activation 1. Localization is complete or occurs with TPM diagnostic tool Measures temperature, pressure, & motion. Enters 4 words when activation occurs Rest State this state after no motion is detected in Normal with TPM diagnostic tool Mode/Normal State.  8 pressure/temperature data/words every 4 seconds Transmits periodically. Enters this mode when: for 1 minute Alert Mode 1. Significant pressure delta detected  4 words when activation occurs with TPM diagnostic tool Data Frame/Delays A data gram is composed of one or more identical data frames separated by random and or fixed delays. The number of frames, and delay times will depend on if the Datagram is periodic, or is in response to an LF request. The Normal, Local Z and Alert Data Gram shall be composed of 8 identical data frames separated by pseudo random delays as shown in the table below. The pattern transmitted is randomly selected. . For RF transmissions that are responding to an LF command, pattern 1-4 is randomly selected and only the first 4 frames are transmitted.

Frame time 7.6 ms Frame # 1 2 3 4 5 6 7 8 delay delay delay delay delay delay delay delay Pattern 1 0 12 84 18 100 1 100 6 Pattern 2 0 1 100 18 84 6 84 12 Pattern 3 0 18 84 6 84 6 100 1 Pattern 4 0 6 100 1 100 12 84 18 Environmental Conditions Operating Temperature Range: -40° to 120°C Humidity: 0 to 100% Transmission / RF Characteristics Parameter Units Low Nom High Conditions Modulation Type FSK Centre Frequency MHz 433.92 -40° to 120°C FSK Deviation kHz 60 Frequency MHz 433.85 434.000 -40° to 120°C Output Power mW 5 25°C (Continuous Wave) (ERP) Antenna Specification Antenna gain: =-20.66dBi PRINCIPLES OF CIRCUIT OPERATION The sensor incorporates an ASIC to measure the parameters within the tire. The ASIC outputs the measured data in digital pulses. The digital data is frequency modulated. The transmitted signal uses Frequency Shift Keying (FSK). The carrier frequency of the sensor is 434MHz typically. The worst case frequency shift of the carrier is 433.92MHz for the low frequency and 434MHz for the high frequency shift. The receiver bandwidth must be wide enough to pass the transmitter worst case frequency shifts. Reference Block Diagram below. Block Diagram

COMPLIANCE STATEMENT The TPM Transmitter is sold only as part of a vehicle by the retail automobile dealers and as such has no separate manual. The compliance statement for the TPM Transmitter will be integrated by the OEM into the vehicle owner’s manual. It will read: This device complies with KCC 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. WARNING: Changes or modifications not expressively approved by TRW Automotive U.S. LLC could void the user’s authority to operator the equipment.

Laser Marking ITEMS TO BE LASER MARKED A TRW LOGO TRW B TRW PART NUMBER 225816-122 C 2D BAR CODE (6X6) D TRANSMITTER SERIAL ID XXXXXXXXX E FREQUENCY 434MHZ F CUSTOMER PART NUMBER 52933-3V600 G NUT TIGHTENING TORQUE NUT 4.0Nm J INDUSTRY OF CANADA CERTIFICATION NUMBER IC :1470A-46T K KC LOGO KC L KC ID TAU-225816-122 M CE LOGO CE O MANUFACTURING NATION MADE IN USA P SUPPLIER P/N FOR CANADIAN CERTIFICATION 225816-122 R MANUFACTURERS ID TRW AUTOMOTIVE U.S. LLC Laser Marking Chart 225816-122

225816-131 ITEMS TO BE LASER MARKED A TRW LOGO TRW B TRW PART NUMBER 225816-131 C 2D BAR CODE (6X6) D TRANSMITTER SERIAL ID XXXXXXXXX E FREQUENCY 434MHZ F CUSTOMER PART NUMBER 52933-2Y450 G NUT TIGHTENING TORQUE NUT 4.0Nm J INDUSTRY OF CANADA CERTIFICATION NUMBER IC :1470A-46T K KC LOGO KC L KC ID TAU-225816-122 M CE LOGO CE O MANUFACTURING NATION MADE IN USA P SUPPLIER P/N FOR CANADIAN CERTIFICATION 225816-131 R MANUFACTURERS ID TRW AUTOMOTIVE U.S. LLC Laser Marking Chart 225816-131


Document Created: 2013-06-20 11:39:54
Document Modified: 2013-06-20 11:39:54
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC