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Dual-mode transmitter

  • US 7,110,731 B2
  • Filed: 12/11/2003
  • Issued: 09/19/2006
  • Est. Priority Date: 08/25/1999
  • Status: Expired due to Fees
First Claim
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1. A transmitter, comprising:

  • a multi-signal generator for simultaneously providing a plurality of signals within a portion of a selected frequency band and having a center frequency and relative frequency spacing of said simultaneous plurality of signals, wherein said multi-signal generator is a variable multi-signal generator for selectively adjusting said center frequency to cause said plurality of signals to cover a differing of the selected frequency band;

    a modulator connected to said multi-signal generator for selectively and simultaneously modulating said plurality of signals;

    a control unit for selectively controlling said multi-signal generator center frequency;

    a decoder adapted to prevent a transmission of said plurality of signals in response to receipt of an emergency transmission.

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