5.Features
5.1 Transmission frame
The transmission begins immediately in case of LOCK and UNLOCK button is pressed.
but Panic buttonis begun after 0.5s
The transmission frame consists of the synchronous frame and the data frame. The synchronous frame
has 320bit 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 4bit function code and 8bit crc 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 300 milliseconds.
5.2 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 trans-
mitting, the micro-computer switches stand-by mode by itself.
