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Hybrid electronic radio repeater

  • US 4,862,514 A
  • Filed: 11/24/1986
  • Issued: 08/29/1989
  • Est. Priority Date: 11/24/1986
  • Status: Expired due to Term
First Claim
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1. An improved hybrid electronic radio repeater, comprising:

  • antenna means, for receiving a select, narrow frequency band of radio wave signals;

    said radio wave signals being transmitted from a source, said radio wave signals containing source status and control information;

    radio frequency amplifier means, for filtering and amplifying said radio signals;

    mixing means, including local oscillator means, for combining said radio frequency signals with said local oscillator signals to produce intermediate frequency signals;

    tuning means for filtering, tuning, and controlling the bandpass of said intermediate frequency signals;

    intermediate frequency amplifier means, for detecting and amplifying said intermediate frequency signals, and for generating a signal strength level indication in response thereto; and

    control means, said control means including microprocessor means, said control means being an intelligent unit capable of discerning information and generating responses thereto, for monitoring said signal strength level indication, said control means also for initiating the scan of said narrow frequency band for the presence of select radio wave signals, said control means tuning said hybrid repeater in response to the presence of said select signals,said control means tuning said receiver by scanning a select frequency bandwidth, reading the signal strength level indicator at each scan location, storing maximum readings at each scan frequency corresponding thereto, storing noise data corresponding to each said reading, generating and storing a signal-to-noise ratio corresponding to each said reading, and fine tuning said receiver based upon a slow scan generated in response to said signal-to-noise readings.

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