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Acquisition system for a long record length digital storage oscilloscope

  • US 6,807,496 B2
  • Filed: 05/02/2002
  • Issued: 10/19/2004
  • Est. Priority Date: 05/02/2002
  • Status: Expired due to Fees
First Claim
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1. An acquisition system for a long record length digital oscilloscope, comprising:

  • an input terminal for receiving a signal under test;

    an analog-to-digital converter having an input coupled to said input terminal for receiving said signal under test, and producing digital samples of said signal under test at an output;

    a trigger circuit having an input coupled to said input terminal for receiving said signal under test, and producing a primary trigger signal at an output in response to detection of a predetermined trigger event in said signal under test;

    a deep acquisition memory for storing said digital samples of said signal under test as a long length data record, the storing continuing for a predetermined number of digital samples after the primary tripper signal; and

    processor circuitry for examining said stored digital samples from the long length data record in a post acquisition mode of operation and producing a secondary event detect signal in response to detection of a predetermined secondary event in said stored digital samples, and causing a predetermined amount of said stored digital samples to be read from said long length data record and processed for display;

    said predetermined amount of said stored digital samples being less than the long length data record and being related in time to said secondary event detect signal.

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