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Method of using SNR to reduce factory test time

  • US 20060194552A1
  • Filed: 02/25/2005
  • Published: 08/31/2006
  • Est. Priority Date: 02/25/2005
  • Status: Active Grant
First Claim
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1. A method of testing receiver sensitivity in a radio frequency (RF) device comprising:

  • (a) selecting a new test quantity to replace a known receiver sensitivity test parameter;

    (b) determining the relationship between said known receiver sensitivity test parameter and said new test quantity;

    (c) determining a new test criteria based on said new test quantity in accordance with a defined standard; and

    (d) conducting a receiver sensitivity test using said new test quantity and said new test criteria. wherein said new test quantity has a predetermined and monotonic relationship with said known receiver sensitivity test parameter, and wherein said new test quantity is read from a baseband processor associated with said RF device, and wherein said step of determining a new test criteria comprises;

    (i) obtaining a plurality of said known receiver sensitivity test parameter measurements and corresponding values of said new test quantity at each of a plurality of received signal strengths;

    (ii) calculating at each of said plurality of received signal strength levels an average value of said plurality of said known receiver sensitivity test parameter measurements;

    (iii) plotting the averages of N-sample groups of said corresponding values of said new test quantity versus said calculated average values of said plurality of said known receiver sensitivity test parameter measurements and determining targeted confidence level probability points from said plot, (iv) interpolating between said targeted confidence level probability points for different ones of said plurality of received signal strength levels; and

    (v) determining a pass/fail threshold for said new test quantity which corresponds to a pass/fail criteria associated with said defined test standard.

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