
Using digital storage oscilloscopes
Triggering is such an important aspect of using a digital storage
oscilloscope that, although it has been covered in some detail in a
previous chapter, some further comments here will not be out of
place. The commonest form of triggering used is edge triggering,
where the oscilloscope triggers, on each sweep, on the first edge that
it sees crossing the user-set trigger level, in the selected direction
(e.g. positive-going). This is fine for a simple repetitive waveform
such as a sine or squarewave. But with a more complicated
sequence of events, it