block diagram

FCC ID: GQ4-34T

Block Diagram

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FCCID_807138

TRW Automotive April 27, 2007 OSS Electronics 24175 Research Dr. Farmington Hills, MI 48335-2642 Tel 248.478.7210 Fax 248.478.7241 RE: Certification for Honda MY08 ASK Baseline TPM Sensor Model #: 217652-103 FCC ID: GQ4-34T Canada IC: 1470A-15T 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 gates on and off a power amplifier which couples the RF carrier to the antenna. The transmitted signal uses Amplitude Shift Keying (ASK). The carrier frequency of the sensor is 315 MHz typically. The worst case frequency shift of the carrier is 314.75MHz for the low frequency and 315.2MHz for the high frequency shift. The receiver bandwidth must be wide enough to pass the transmitter worst case frequency shifts. Reference Block Diagram in Figure 3. BLOCK DIAGRAM Housing Battery Pressure / Temperature Valve - Rim RF Oscillator /Accel Sensor Mount / Control IC 9.84375MHZ XTAL LF Receiver Figure 3. TPM Sensor Block Diagram Legal name here


Document Created: 2007-06-17 12:42:25
Document Modified: 2007-06-17 12:42:25
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