REMOTE ACTUATING APPARATUS

摘要

A garage door opening system comprises a receiver (73) which is responsive both to security codes in a first format (fig. 1) from existing transmitters and to security codes in a new and more secure format (fig. 2) from new transmitters (51). The old format comprises a synchronization character and ten code words and the new code format advantageously comprises twenty code words with a new synchronization character between the tenth and eleventh code words. The receiver determines (105) from the received synchronization codes the type of format being received and compares (109, 115) the received code words with stored permitted code words of the same type. When a match occurs (111, 117) an activation signal is generated (113).