Continental Automotive TIS-09DL User Manual

Tire Pressure Generation TIS-09DL
Wheel Unit
Type
ASK/FSK 433.92 MHz
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1. SYSTEM OVERVIEW
The tire pressure monitoring system (referred as TG for Tire Guard) consists of the following units:
- Tire guard wheel unit type TIS-09DL which includes an integrated pressure, temperature and acceleration sensor and a RF transmitter.
- LF receiver unit which includes a LF receiver (not described in this document) The TG monitors a vehicle's tire pressure whilst driving or stationary. An electronic unit (wheel
unit) inside each tire, mounted to the valve stem, periodically measures the actual tire pressure. By means of RF communication, this pressure information is transmitted to the RF receiver.
2. TECHNICAL DESCRIPTION
Carrier frequency: 433.92 MHz Number of channels: 1 Type of modulation: Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK) Baud rate: 4096bps, 9600bps Rated Output Power: < 10mW Antenna: Internal Voltage supply range: 2.1 up to 3.2V Temperature range: -40 up to +120°C
3. TYPICAL USAGE PATTERN
3.1 AVERAGE FACTOR CALCULATION (Standard 47 CFR Part 15C (periodic
intentional transmitter))
Maximum transmitting duration in whatever 100ms windows: 19.73ms
Averaging factor = 20xlog(19.73/100)=--14.1dB
Detail of the calculation:
Baudrate = 4096bps Tolerance Baudrate = 1%
Bit duration (max) = 1.01/4096 = 0,24658203125
Frame Length = 10 bytes = 80 bits
Frame duration (max) = 19.73ms
Averaging Factor = 20*log (Frame duration / 100ms)
Averaging Factor = -14.1dB
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