Valid Trigger Conditions - HBM Genesis GEN5i User Manual

GEN5i
10.2.2

Valid trigger conditions

Trigger detection is based on level crossing: A signal has to cross a specified
level to be considered a trigger condition. As a consequence, reaching the
required level is not a valid trigger condition. Since trigger detection is digital,
inter-sample analog values are omitted.
In the following graphs these conditions are shown.
Figure 10.1: Level crossing detector
As trigger mode basic trigger is shown with a specified level (T), and a level
crossing in positive direction. In Figure 10.1 (A) the trigger occurs on the first
sample after the level crossing. Figure 10.1 (B) shows the situation in which a
sample equals the set level. Trigger does not occur until a sample is actually
above the required level.
Since the trigger detector requires a level crossing, no trigger occurs when a
signal is above the set level when recording starts. This is depicted in Figure
10.1 (C).
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