Continental Automotive TIS 19 User Manual

Tire Pressure Monitoring Sensor

Model: TIS-19

Type

ASK/FSK 433.92 MHz

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1. SYSTEM OVERVIEW

The tire pressure monitoring system (referred as TPMS) consists of the following units:

- Tire pressure monitoring system type TIS-19 which includes an integrated pressure, temperature and acceleration sensor and a RF transmitter.

- LF part which includes a LF receiver (not described in this document) The TPMS 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: 9600bps 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: 16.83ms



Averaging factor = 20xlog(19.73/100)=--15.6dB

Detail of the calculation:

Baudrate = 9600bps Tolerance Baudrate = 1%

 Bit duration (max) = 1.01/9600 = 105.208us

Frame Length = 40 bytes = 320 bits ASK dutycycle = 50%

 Frame duration (max) = 16.83ms

Averaging Factor = 20*log (Frame duration / 100ms)

Averaging Factor = -15.6dB

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