Tire Pressure Monitoring System (TPMS)
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| Frequencies | 315 MHz,434 MHz |
| Frequency Range | 315 MHz - 434 MHz |
| Mode | AM |
| Modulation | FSK |
| ACF | 7.433ms |
| Emission Designator | — |
| Bandwidth | 100 kHz |
| Location | Worldwide |
| Short Description | TPMS (Tire-Pressure Monitoring System), more specifically Direct TPMS (dTPMS), is a system that uses pressure sensors to monitor tire pressure on vehicles. |
| I/Q Raw Recording | Download file |
| Audio Sample | |
TPMS (Tire-Pressure Monitoring System), more specifically Direct TPMS (dTPMS), is a system that uses pressure sensors to monitor tire pressure on vehicles. This is the RFRadio Frequency signal that is transmitted from wireless TPMS pressure sensor variants of TPMS, as there are mechanical, electrical, and magnetic variants which do not employ RFRadio Frequency transmission of data to the car. Each tire outfitted with this system contains a pressure sensor that may also monitor temperature. Data is constantly being fed from the sensors to the car's receiver.
Characteristics[edit]
TPMS occupies about 100 kHzKiloHertz (kHz) 10^3 Hz from the primary sidebands, and employs FSKFrequency-Shift Keying.
Width of a single transmission is measured to be ~7.55ms
FSKFrequency-Shift Keying Waveform
Spectrum and Waterfall view of TPMS
Symbol rate is measured to be ~20240 bpsBits per second (bps).
FSKFrequency-Shift Keying Shift is measured to be 60.7 kHzKiloHertz (kHz) 10^3 Hz
IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. Sample provided in Infobox, credits ANgazu.
Frequencies[edit]
- 434 MHzMegaHertz (MHz) 10^6 Hz in Europe
- 315 MHzMegaHertz (MHz) 10^6 Hz Elsewhere
Decoding Software[edit]
Video Examples[edit]
Additional Links[edit]
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