Continental Automotive 5WK48903 Transmitter User Manual Users manual

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Document ID	676905
Application ID	tir+7eTvyMUbvpH98DsZDA==
Document Description	Users manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	2.64kB (32948 bits)
Date Submitted	2006-07-04 00:00:00
Date Available	2006-07-04 00:00:00
Creation Date	2006-06-27 16:27:31
Producing Software	Acrobat Distiller 7.0.5 (Windows)
Document Lastmod	2006-06-27 16:28:08
Document Title	Microsoft Word - Annex No 5 Key; 5WK4 8903 _Functional description_.doc
Document Creator	PScript5.dll Version 5.2
Document Author:	Ralf Trepper

Annex No.5
Page 1 of 5
Functional Description
Key: 5WK4 8903
SIEMENS AG
Siemens VDO Automotive
SV C BC P2
FCC ID:KR55WK48903
IC:267T-5WK48903
User Manual / Functional Description
of the
Siemens VDO
Radio Frequency Transmitter
Type
5WK48902
5WK48903
5WK48906
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Page 1 of 4
SIEMENS AG
Siemens VDO Automotive
FCC ID:KR55WK48903
SV C BC P2
IC:267T-5WK48903
Functional description of Nissan D – Plateform i – key
This document gives an overview of the operation modes and resulting RF transmissions of the
key. In this document the device is referenced as "key", even if the mechanical backup key might
be separated form it.
For an overview of the electrical function blocks, please see the document "Block diagram of
Nissan D – Plateform i – key".
Operating modes
The key has three main operating modes which differ in the regard of signals transmitted on the
RF. As there is
•
•
•
· Immobilizer transponder mode
· Remote key functionality
· Passive key functionality
Immobilizer Transponder mode
When the key is operating as an immobilizer transponder, communication is done over a "contact
less interface" depending on strong magn etic coupling. The transponder is the passive side of the
link and there is no RF transmission from it involved in any aspect.
Remote key functionality
This mode refers to the use of the key as a remote control to initiate actions on vehicle side such
as open or close door latches and such alike. RF transmission always depends on a user
activating a button on the key. Duration of the button press influences the amount of telegrams
sent on the RF channel.
Short Button press:
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SIEMENS AG
Siemens VDO Automotive
SV C BC P2
FCC ID:KR55WK48903
IC:267T-5WK48903
A valid but short button press, as indicated in the upper half of the above diagram, results in a
minimum number of RF telegrams to be sent. This is visualized in the lower half of the diagram.
Long button press:
If the button press duration extents the time required for sending the minimum amount of RF
telegrams, additional ones are transmitted until the button is released or a timeout of 25s is
reached. This timeout prevents unintended transmissions over extended time period s in case of a
stuck button.
Passive key functionality
For passive key operation no user action on key side is required. The trigger is delivered from the
vehicle via an LF data telegram. Upon reception of a valid LF message, the key responds with
two telegrams on RF side while the inter telegram timing in this mode depends on key
configuration data (sort of time slot concept).
RF parameters
For all RF transmission the following parameters apply:
Center frequency
US variant
315 MHz
JP variant
314.85 MHz
Frequency accurracy
± 30 kHz
± 20 kHz
Frequency deviation
± 25 kHz nominal
± 25 kHz nominal
RF modulation
FSK
FSK
RF frame baudrate
2 kBd
2 kBd
Data coding
Manchester
Manchester
Variants
5WK48902
5WK48903
5WK48906
Japan Version 315 MHz LP
US Version 315 MHz
US Version 315 MHz, same as 5WK48903
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Page 3 of 4
SIEMENS AG
Siemens VDO Automotive
SV C BC P2
FCC ID:KR55WK48903
IC:267T-5WK48903
only different Logo at device
Label Design
Siemens VDO
5WK48903
FCC ID:KR55WK48903
IC:267T-5WK48903
Warning Statement:
NOTE
This device complies with part 15 of the FCC Rules and RSS-210. Operation is
subject to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept interference received, including
interference that may cause undesired operation.
COUTION
Changes or modifications not expressly approved by the manufacturer could avoid the user's
authority to operate the equipment.
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Page 4 of 4

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