Continental Automotive 5WK45032 RF Transmitter 5wk4 5032 315MHz User Manual Functional Description

Continental Automotive GmbH RF Transmitter 5wk4 5032 315MHz Functional Description

User Manual

FCC ID: KR55WK45032File: s:\postzula\vw\kessy\func_5wk45032_e page 1 of 4User Manual / Functional Descriptionof theSiemensRF Transmitter5WK4 5032 315 MHzLanguage: English
FCC ID: KR55WK45032File: s:\postzula\vw\kessy\func_5wk45032_e page 2 of 4General description of the RF transmitterThe 315 MHz RF remote control system consisting of a RF transmitterand a RF receiver mounted within the control unit. The RF transmitter ismechanically integrated in the head of the key. This transmitter is used totransmit an information for locking or unlocking the vehicle by anunidirectional RF transmission line for normal remote operation by pressing abutton. For passive access functionality the transmitter is able to reply to aninductive command with sending a remote telegramme.In general the following functions are provided by pressing the buttons:- Lock the car- Unlock the car- Unlock truncAdditional the following functions are provided (Keyless Entry/Go Functions):- Lock/Unlock the car- Start/Stop the enginePower supplyThe transmitter is provided with 1 Lithium battery (CR2032) that gives atension of feeding of +3V.The battery inversion is protected mechanically.ButtonsThere are three buttons which enable to lock, unlock the doors and unlock thetrunk. During activation, the button is forced to the ground via a “pull-up”within the microcontroller.LEDThe LED is turned on between transmission blocks.
FCC ID: KR55WK45032File: s:\postzula\vw\kessy\func_5wk45032_e page 3 of 4OscillatorThe oscillator is of PLL type. The operating frequency is about 315 MHz ± 75kHz.Mechanical designThe mechanical of the transmitter is composed of four parts:the superior shellthe inferior shellmetal insertbattery support (mechanical protection to afford battery inversion)The battery placement is integrated in the inferior shell.Technical dataCarrier frequency 315 MHz ± 75 kHzOutput Power < -18 dBm (carrier frequency)Type of modulation ASKMethod of frequency generation CrystalNumber of channels 1Baudrate 2 k BaudPower supply 3 VoltType of battery LithiumTransmission range typical 10 meters
FCC ID: KR55WK45032File: s:\postzula\vw\kessy\func_5wk45032_e page 4 of 4Typical usage pattern27 lock / unlock operations in 24 hours with a typical transmission duration of500 millisecondsTransmitter ON 13,5 seconds / 24 hoursTransmitter OFF 86.386,5 seconds / 24 hoursDuty Cycle: TON / T (ON+OFF) x 100% = 13,5 / 86.400 x 100 % = 0,015 %Block diagram of the transmitterLabel designSetup of homologation testing samplesFor homologation testing the testing samples are equipped with continuoustransmission mode. After inserting the battery the transmitter starts continoustransmission until the battery is removed.These special function have only been implemented for the testing related toradio homologation.This procedure does not correspond to the standard mode ofoperation!!!LEDAntennaRF stageµC Transponder /inductive receiverPowerButtonsSiemens 315 MHz, 5WK4 50323D0 959 753 KWJJFCC ID: KR55WK45032CAN: xxx xxx xxxx

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