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System and method for calibrating a signal detection threshold circuit

  • US 6,304,828 B1
  • Filed: 04/02/1999
  • Issued: 10/16/2001
  • Est. Priority Date: 04/02/1999
  • Status: Expired due to Fees
First Claim
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1. A method of calibrating a signal detection threshold circuit comprising the steps of:

  • setting a threshold setting at an initial threshold value;

    receiving noise signals in at least one signal channel in said signal detection threshold circuit;

    rejecting each of said noise signals lower than said threshold setting;

    determining a pulse repetition frequency of noise pulses greater than said threshold setting;

    lowering said threshold setting by a predetermined increment and repeating steps a-c until said pulse repetition frequency of said noise pulses is greater than a predetermined frequency;

    storing said threshold setting as a noise measurement when said pulse repetition frequency is greater than said predetermined frequency;

    repeating the threshold setting step through the threshold lowering step until a predetermined number of noise measurements are made for said at least one signal channel;

    determining an average value of said predetermined number of noise measurements and setting said threshold setting to said average value when a predetermined number of acceptable noise measurements are made in said at least one signal channel;

    indicating successful calibration of said at least one signal channel in said signal detection threshold circuit when said predetermined number of acceptable noise measurements are made in said at least one signal channel; and

    indicating unsuccessful calibration of said at least one signal channel in said signal detection threshold circuit when a predetermined number of unacceptable noise measurements are made in said at least one signal channel.

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