10.3.2
Dual trigger mode
In dual trigger mode two detectors are active and working simultaneously: the
primary level
P
and the secondary level
S
. With two levels, it is possible to define
a range that the input signal must be within. As soon as the signal becomes
larger than the upper level or smaller than the lower level, the detector
generates a trigger. By inverting the slopes of both detectors, the trigger is
generated when the signal returns into the specified range.
Figure 10.5 shows the various possibilities.
A
A
A
A
P
P
1
2
S
S
P
P
3
4
S
S
Figure 10.5:
Dual trigger mode
A
Trigger
Any value for each level and the slope of the primary level can be selected. The
slope of the secondary level is automatically set to the opposite direction.
Diagrams
1
and
3
show a signal that exits the range. Diagrams
2
and
4
show
signals that enter the range.
Relevant settings for this mode:
l
Mode: dual
l
Primary level: any value within the input range
l
Secondary level: any value within the input range
l
Direction: positive or negative for primary level; secondary level is
automatically set to the opposite direction
l
Hysteresis: any relevant value is used for both levels.
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