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4.Features
4.1 Transmission frame
The transmission begins immediately in case of LOCK and UNLOCK and PANIC button is pressed.
The transmission frame consists of the synchronous frame and the data frame. The synchronous frame has 30 synchronous codes
that it will be used for the receiver to wake up. The data frame consists of 24bit length identification code, 16bit security code
and function code. 16million different identification codes are available.
The security code is always changed in case of any of the buttons is pressed. The transmission time is typically 600
milliseconds.
4.2 Battery saving
To prevent the battery exhaustion, the micro-computer of the transmitter is usually inactive. When the button will be pressed, the
micro-computer wakes up immediately and judges which button is pressing. Then the micro-computer constructs the
transmission frame and radiates it from the antenna .After transmitting , the micro-computer switches stand-by mode by itself.
5. Derivatives
OKA-620R is an integrated controller for a car body control, includes the keyless entry receiver.
The integrated controller consists of the multiple control functions as follows, centralized door lock, and so on.
WARNING
Any 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
operations.
