Simplified high frequency tuner and tuning method

  • US 7,116,963 B2
  • Filed: 08/25/2003
  • Issued: 10/03/2006
  • Est. Priority Date: 09/13/1996
  • Status: Expired due to Fees
First Claim
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1. A tuning method comprising:

  • (a) mixing a channel of interest from a channelized spectrum having a predetermined channel spacing with a first local oscillator signal;

    (b) mixing the channel of interest with a second local oscillator signal having the first frequency and being approximately in quadrature with the first local oscillator signal;

    (c) wherein the first local oscillator signal has a first frequency that is (1) one-half of a channel spacing displaced from an integer multiple of the channel spacing, and (2) selected to frequency translate the channel of interest to within a passband whose lower edge is spaced from DC by about the channel spacing and whose width is about the channel spacing;

    (d) the channel of interest has a predetermined maximum bandwidth less than the channel spacing;

    (e) the channel of interest lies within one of an upper high frequency spectrum of interest and a lower high frequency spectrum of interest; and

    (f) the method further comprises providing spectrum coverage within one of the high frequency spectra of interest and not the other.

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