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A logic analyzer is an electronic instrument that is used to capture and display multiple signals from a digital system or circuit. This electronic laboratory test instrument is designed to evaluate and display signals from electronic circuits being tested in order to determine whether the circuit is working as designed and that there are no bugs. It works in much the same way as an oscilloscope but is capable of capturing multiple signals.
A logic analyzer, in its most basic of operations, captures, conditions, analyzes and then displays a series of digital events produced by a specific electronic device or circuit. Once captured, the data can be rendered as decoded traffic, state listings or even graphical images. Advanced versions can store previous data and then compare these to new data sets to bring further insight on the activities of the circuit or system being tested.
A logic analyzer also has advanced triggering capabilities, which are useful for visualizing the timing relationships present between the many different signals in a digital system.
Categories of a logical analyzer: