Continental Automotive TIS 10 User Manual

Tire Pressure Generation TIS-10

Wheel Unit

Type

ASK/FSK 315 MHz

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1. SYSTEM OVERVIEW

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The tire pressure monitoring system (referred as TG for Tire Guard) consists of the following units:

- Tire guard wheel unit type TIS-10 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: 315 MHz Number of channels: 1 Type of modulation: Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK) Baud rate: 9600bps Rated Output Power: < 10mW Antenna: Internal Voltage supply range: 2.1 up to 3.2V

3. TYPICAL USAGE PATTERN

3.1 AVERAGE FACTOR CALCULATION (Standard 47 CFR Part 15C (periodic intentional transmitter))

Maximum transmitting duration in whatever 100ms windows: 10.31ms

Averaging factor = 20xlog(10.31/100)=-19.73dB

Baudrate 9600bps:= ToleranceBaudrate 1 Framebyte 12byte 2 Framebits Framebyte:= Framebits 98=

tbit

Baudrate 1 ToleranceBaudrate−()⋅

tbit 0.10522m tFramebits tbit Framebit tFramebits 10.31145m tFrameFSKbits tFramebits 1⋅:=

AveragingFactor_tFrame 20log

⋅=

+:=

⋅:=

⋅=

tFrameFSKbits

due to FSK 100%

100ms

Averaging Factor_tFrame = -19.8dB

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