7 PICOSCALE CONTROL GUI
Trigger Event
Data Source Value
The
Data Source Value
event performs a state change of the trigger source output when a data
source value passes a certain threshold or enters a certain range. Please note that not all data
sources are available. The possible data sources are restricted to
position, Calculation System
outputs, ADCs and counters. The
Condition
menu allows to de
fi
ne how the selected data source
value and the con
fi
gured threshold(s) are evaluated. The following conditions are available which
are illustrated in
fi
•
Single Rising
/
Single Falling
: The trigger source output is H
I
GH when the selected data source
value passes the
Threshold
from below/above. Once the trigger source is in a logically high
state, it stays high until reset.
•
Single Either
: The trigger source output is H
I
GH when the selected data source value passes
the
Threshold
from below or above. Once the trigger source is in a logically high state, it stays
high until reset.
•
Positive/Negative Level
: The trigger source is H
I
GH when the data source value is above the
Threshold
and is LOW when the data source value is below the
Threshold
. For the negative
level it is vice versa.
•
Positive/Negative Range
: The trigger source is H
I
GH when the data source value is
inside
the
range de
fi
ned by the
Lower
and
Upper Threshold
and LOW otherwise. For the negative range
it is high when the data source value is
outside
the speci
fi
ed range.
Figure 7.9: Summary of trigger conditions. Two traces of a data source are shown (position, for
example) with a user de
fi
ned threshold. The trigger conditions
single rising, single falling,
single either, positive level
and
negative level
are illustrated.
57
PicoScale User Manual
