| 摘要 |
PROBLEM TO BE SOLVED: To efficiently transmit and receive an RF signal in various frequencies by receiving an operating signal from an existent remote transmitter and transmitting a modulated RF carrier signal generated by a transmitter from an antenna capable of dynamic tuning. SOLUTION: By pressing one of the push button switches 44, 46 and 47 in a learning mode, a micro-controller 57 stores the carrier frequency, the demodulation mechanism and the data code of a received RF operating signal B transmitted from a remote transmitter 65. Next, when the corresponding switches 44, 46, 47 are pressed in an operation mode, a frequency outputted from the oscillator of an RF circuit 58 is controlled to transmit an RF signal T with an identified characteristic of the RF signal B necessary for operating a garage door opener 66 from the antenna 59 capable of dynamic tuning. Consequently, this transceiver is capable of training the different RF signal B so as to operate the plural devices except the garage door opener 66 by pressing the corresponding one of the switches 44, 46 and 47. |
