Remote equipment control system with low duty cycle communications link

摘要

The invention is directed to a remote equipment control system having a low duty cycle communications link between a remote command transmitter and a remote receiver. The remote receiver is controllingly coupled to the equipment. The remote command transmitter includes a means to transmit a message signal of set time duration at a preselected message separation interval. The message signal has a unique address portion and a command portion. The remote receiver includes a decoding unit and a timing circuit. The decoding unit is responsive to the unique address portion of a received message to provide an enabling signal to be delivered to the timing circuit. The timing circuit upon receipt of the enabling signal provides an output to the decoding unit to prevent entry of any message signal to the decoder for a time duration matching the preselected message separation interval and allowing entry of a message signal for a time duration matching the time duration of the message signal. The enabling signal also conditions the decoder to accept the next arriving message signal allowed entry which has the unique address, whereupon the message signal command portion is decoded and a command signal is delivered to the remote equipment to be controlled.