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Radio link remote control signaling system, and method

  • US 4,476,573 A
  • Filed: 10/21/1982
  • Issued: 10/09/1984
  • Est. Priority Date: 11/07/1981
  • Status: Expired due to Fees
First Claim
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1. Remote control system having a radio transmition linkon which a signal comprising program information and binary control information is being transmitted between a transmitting station and a receiving station on an ultra-high frequency carrier,said program information is frequency modulated (FM) on the carrier,an auxiliary carrier (57 kHz) which is frequency modulated on said ultra-high frequency carrier,a first control modulating signal (AR) which is amplitude modulated (AM) on the auxiliary carrier, and adapted for effecting receiver switching with long switching response time characteristics,a second control modulating signal which is AM modulated on the auxiliary carrier in the form of a predetermined number of bits, forming command words, which have a repetition rate such that the command words are short with respect to said switching response time of said long switching response time characteristic, said receiving station comprising a detector for detecting said auxiliary carrier, a demodulator coupled to said detector for providing said first and second control modulating signals, a data receiver (14) connected to said demodulator to receive the first and the second control modulating signals, and having means for responding only to the second of the control modulating signals comprisinga memory (15) having a capacity of receiving only said predetermined number of bits forming said command words;

  • and a clock (17) controlling storage of said bits in the memory, said clock having a repetition rate which is capable of controlling storage of said number of bits in the memory during a time less than said switching time, and means (18a) for blocking storage of information in said memory for a period of time which exceed said switching response time.

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