Patent ID: 6748335
Filing Date: 2004-06-08
Classification: G01R

Abstract:
An acquisition system for a multi-channel long record length digital oscilloscope, comprising:a plurality of input terminals for receiving signals under test; an analog-to-digital converter having an input coupled to said input terminals for receiving said signals under test, and producing digital samples of said signals under test at an output; a trigger circuit having an input coupled to said input terminals for receiving said signals under test, and producing a trigger signal at an output in response to detection of a predetermined trigger event in one of said signals under test; deep acquisition memory for storing said digital samples of said signals under test as a plurality of relatively long length data records that form a long length data record as a function of the trigger 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 an 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 acquisition memory for processing and display; said predetermined amount of said stored digital samples being less than any one of the relatively long length data records and being related in time to said event detect signal.