High Quality Content by WIKIPEDIA articles! A logic analyzer is an electronic instrument which displays signals of a digital circuit which are too fast to be observed and presents it to a user who can then precisely observe with greater ease the operation of the digital system under test. It is typically used for capturing data in systems having too many channels to be examined with an oscilloscope. Software running on the logic analyzer can convert the captured data into timing diagrams, protocol decodes, state machine traces, assembly language, or correlate assembly with source-level software.