SV C BC P2 RF TG Siemens VDO Automotive AG IC: 267T-5WK49123 FCC ID:KR55WK ______________________________________________________________ User Manual / Functional Description of the Siemens VDO Radio Frequency Transmitter type 5WK4 9123 File: S:\Postzula\BMW\PL2_Sender\Func_5WK49123.doc Page 1 of 3 SV C BC P2 RF TG Siemens VDO Automotive AG IC: 267T-5WK49123 FCC ID:KR55WK ______________________________________________________________ General description of the RF transmitter The RF remote control system consists of a RF transmitter and a RF receiver mounted within the control unit. The RF transmitter is mechanically integrated in the head of the key. This transmitter is used to transmit an information for locking or unlocking 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 Power supply The transmitter is provided with 1 Lithium Akku (VL 2020) that gives a tension of feeding of +3V. Buttons There are three buttons which enable to lock and unlock the doors and to unlock the trunk. During activation, the button is forced to the ground via a pull-up within the microcontroller. File: S:\Postzula\BMW\PL2_Sender\Func_5WK49123.doc Page 2 of 3 Siemens VDO Automotive AG IC: 267T-5WK49123 FCC ID:KR55WK ______________________________________________________________ SV C BC P2 RF TG Block diagram of the transmitter C/Transponder RF stage Antenna Buttons Power Technical Data:
Carrier frequency Output power/field strength:
Type of modulation:
Method of frequency generation:
Number of channels:
Power supply:
Type of battery:
Transmission range:
Label design USA/CAN:
Siemens VDO 5WK4 9123 IC: 267T-5WK49123 FCC ID:KR55WK49123 315.0 MHz 0.05%
< 10 mW FSK PLL 1 akku (VL 2020) lithium
< 10 m 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 interference that may cause undesired operation. File: S:\Postzula\BMW\PL2_Sender\Func_5WK49123.doc Page 3 of 3