The trigger settings determine the starting conditions for a new measurement.
![1](drex_bullet_1.png) Type of trigger source
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Trigger sources can be the analog input signals or the digital inputs of the USB devices.
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![2](drex_bullet_2.png) Trigger source
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This drop-down list shows all trigger sources of the selected type, e.g. all channels of the instrument.
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![3](drex_bullet_3.png) Trigger modes
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Behavior after recording:
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Free running: The trace will continue to run trough the diagram
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Normal: The trace will freeze till the next trigger event
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Single: VM-SCOPE stops, freezes the trace and does not trigger again.
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![4](drex_bullet_4.png) Trigger slope
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Triggering at rising ( _/¯ ) or falling ( ¯\_ ) signal slope
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![5](drex_bullet_5.png) Trigger times
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Length of recording before and after the trigger event
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![6](drex_bullet_6.png) 1 trigger per display clock
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The number of performed triggering can be limited to one trigger per display clock.
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![7](drex_bullet_7.png) Trigger level
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Trigger level for analog sources
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![8](drex_bullet_8.png) Posttrigger to right border
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Activate this checkbox to set the posttrigger time automatically to the right end of the time axis.
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If this feature is not activated recording duration can be manually set by the posttrigger and the signal trace may reach outside the visible diagram range.
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