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Tire Pressure Generation TIS-10DL
Wheel Unit
Type
ASK/FSK 315 MHz
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bit
Framebyte
Framebits
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-10DL which includes an integrated pressure, temperature and
acceleration sensor and a RF transmitter.
- LF 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
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: 10.31ms
Averaging factor = 20xlog(10.31/100)=-19.73dB
Baudrate 9600bps:=
Framebyte 12byte 2
Framebits
Framebits 98=
tbit
:=
:=
Baudrate 1 ToleranceBaudrate−( )⋅
+:=
ToleranceBaudrate 1%:=
1
tbit 0.10522ms⋅=
tFramebits tbit
tFramebits 10.31145ms⋅=
tFrameFSKbits tFramebits1⋅:=
AveragingFactor_tFrame 20log
⋅:=
:=
due to FSK 100%
tFrameFSKbits
100ms
Averaging Factor_tFrame = -19.8dB
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ASK WUP: 320 bits
Baudrate= 9600bps/s (+/-1%)
ASK: 50% duty cycle
Max WUP duration = 16.83ms
tWUPFrameASKbit
AveragingFactor_tWUP 20log
:=
100ms
Averaging Factor_tWUP = -15.5dB
4. BLOCK DIAGRAM
The block diagram below shows the main electronic units of the wheel unit:
26MHz Xtal (Quartz): NDK2016A or KSS CX2016DB
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5. PICTURE
6. LABEL
6.1USA
Continental
TIS-10DL
FCC ID: KR5TIS-10DL
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
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6.2 CANADA
Continental
Model: TIS-10DL
IC: 7812D-TIS10DL
Canada, Innovation, Science and Economic Development Canada (ISED) Notices
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation,
Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the
following two conditions:
(1) This device may not cause interference.
(2) This device must accept any interference, including interference that may cause undesired
operation of the device.
Avis du Canada, Innovation, Sciences et Développement économique Canada (ISED)
L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR
d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio
exempts de licence. L’exploitation est autorisée aux deux conditions suivantes :
(1) L’appareil ne doit pas produire de brouillage;
(2) L’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est
susceptible d’en compromettre le fonctionnement.
CAUTION:
Any changes or modifications not expressly approved by the grantee of this device could void the
user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause
undesired operation.
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