Continental Automotive A2C81494900 Radio Frequency Transmitter for RKE User Manual Functional Description

Continental Automotive GmbH Radio Frequency Transmitter for RKE Functional Description

User Manual

page 1 of 4 Functional Description / User Manual of Continental Remote Control System A2C81494900
page 2 of 4 General description of the RF transmitter The RF (radio frequency) remote control system consists of a RF transmitter and a RF receiver mounted within the control unit. The described system is a radio-frequency remote control for central doors locking / unlocking, trunk release and Panic activity of an automotive vehicle. System Operation: Remote keyless entry function is provided by the RF system of the Rx and the RKE transmitter. The operation of these functions are as follows: Remote keyless Entry: The RKE transmitter operate at 315 MHz. ASK modulated data signal is transmitted to the Rx which receives the encrypted RF signal. Then, it send the data of the signal to corresponding the host Body control module through the communication line. This transmitter is used to transmit an information for locking or unlocking of the vehicle by an unidirectional RF transmission line for normal remote operation by pressing a button. In general the following functions are provided: - Lock the car - Unlock the car - Unlock the trunk of the car - Panic RF KeyIdentifierStart codeRFemissionSRxreceiverHostBCM CommunicationLine
page 3 of 4 Typical usage pattern RKE transmitter 30 lock / unlock operations in 24 hours with a typical transmission duration of 270 milliseconds  1.25 lock / unlock operations / hour Transmitter ON 0.3375 seconds / hour Transmitter OFF 3,599.6625 seconds / hour Duty Cycle: TON / T (ON+OFF) x 100% = 0.3375 / 3,600 x 100 % = 0,009 % The Modulation used is ASK Manchester coded , therefore the radiated energy during one telegram is ON only a half of the time of the telegram this means and AVG factor of 20Log(1/2)= -6dB Variants: Model Description A2C81494900 Transmitter 4button ASK 315MHz Block diagram
page 4 of 4 Technical data transmitter Carrier frequency: 315.00MHz 150kHz Output power : < 75.6dBuV/m @3m Modulation: ASK Method of frequency generation: SAW Resonator Number of channels: 1 Supply voltage: 3 V Battery type: lithium, CR 2025 NOTE: Changes or modifications not expressly approved by the manufacturer 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 Label design Continental A2C81494900 FCC ID: KR5A2C81494900

Navigation menu