
Digital storage oscilloscope fundamentals
exceeding the preset threshold set by the user, sampling ceases
and the
armed
light goes out. The cessation of acquisition may be
either immediate on detection of the trigger event, giving 100%
pretrigger information, or delayed by an amount preset by the user,
giving some (or all) post-trigger information. The delay may even
have been set to correspond to more than the time represented by
one screen width. This represents greater than 100% post-trigger
delay, and could be used for example to capture, in fine detail for
further examination, the last few hundred microseconds ...