This document provides an overview of oscilloscope triggers and other components. It discusses how the trigger circuit works to determine when the oscilloscope acquires data from the analog-to-digital converter. The trigger looks for a specific edge or pattern in the signal and uses that to tell the oscilloscope when to start sampling and storing data. There are different trigger modes like edge, pulse width, and delay that are implemented using comparators and timing circuits. Proper use of the trigger is important for acquiring stable waveforms and avoiding jitter. The document also briefly outlines other oscilloscope subsystems like the attenuator, acquisition memory, and display and provides additional learning resources.