Patent ID: 6807496
Filing Date: 2004-10-19
Classification: G01R

Abstract:
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.