2-8 IM 701450-01E
2.3 Trigger
A
trigger
is a cue used to display the waveform on the screen. The trigger is activated
when the specified trigger condition is met. At this point, the waveform is ready to be
displayed on the screen.
Trigger Source, Trigger Slope, and Trigger Level
Trigger Source
Trigger source
refers to the signal that is used in checking the trigger condition.
Trigger Slope
Trigger slope
refers to the movement of the signal from a low level to a high level (rising
edge) or from a high level to a low level (falling edge). When the slope is used as one of
the trigger conditions, it is called a trigger slope.
Edge
refers to the point where the
trigger source slope passes the trigger level (or, when trigger hysteresis (see page 2-14)
is specified, the point where the slope passes the hysteresis level).
Trigger Level
Trigger level
refers to the level at which a trigger is activated when the trigger source
passes the certain level.
With simple triggers such as the edge trigger described later, a trigger is activated when
the level of the trigger source passes through the specified trigger level.
Trigger level
When set to rising ( ), the trigger
is activated here (edge)
Trigger source
Trigger Type <For the setup procedure, see chapter 6>
The trigger used on the DL7400 can be classified into two main types:
simple trigger
and
enhanced trigger
.
Simple Trigger
This function activates a trigger on a single trigger source.
Edge Trigger <For the setup procedure, see sections 6.5 to 6.7>
When the slope of the trigger source passes through the specified trigger level on a
rising or falling edge, a trigger is activated. You can select the trigger source from input
signals, the external trigger signal, and the commercial power supplied to the DL7400.
In the case of commercial power, a trigger is activated only on the rising edge.
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