User's Manual

5. Features
5.1 Transmission frame
The transmission begins immediately in case of LOCK or UNLOCK button is pressed.
The transmission frame consists of the synchronous frame and the data frame. The synchronous frame
has 81 synchronous codes that it will be used for the receiver to wake up. The data frame consists of 28-bit
length identification code, 16-bit security code and function code. 1600 million 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 370 milliseconds.
5.2 Battery saving
To prevent the battery exhaustion, the microcomputer of the transmitter is usually inactive. When the
button will be pressed, the microcomputer wakes up immediately and judges which button is pressing.
Then the microcomputer constructs the transmission frame and radiates it from the antenna. After
transmitting, the microcomputer switches stand-by mode by itself.
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