User's Manual

4. Features
4.1 Transmission frame
The transmission begins immediately in case of any button is pressed.
The transmission frame consists of the synchronous frame and the data frame. The synchronous frame
has 324 bit codes that it will be used for the receiver to wake up. The data frame consists of 24-bit length
identification code, 16-bit security code, 4-bit function code and 8-bit quality check code.(sometimes).
16000000 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 220 milliseconds.
4.2 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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