Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
PC Vibration Measurement System VibroMetra


The trigger settings determine the  starting conditions for  a new measurement.

Type of trigger source

1. Type of trigger source
Trigger sources can be the analog input signals or the digital inputs of the USB devices.

Trigger source

2. Trigger source
This drop-down list shows all trigger sources of the selected type, e.g. all channels of the instrument.

Trigger modes

3. Trigger modes
Behavior after recording:
  • Free running: The trace will continue to run trough the diagram
  • Normal: The trace will freeze till the next trigger event
  • Single: VM-SCOPE stops, freezes the trace and does not trigger again.

Trigger slope

4. Trigger slope
Triggering at rising ( _/¯ ) or falling ( ¯\_ ) signal slope

Trigger times

5. Trigger times
Length of recording before and after the trigger event

1 trigger per display clock

6. 1 trigger per display clock
The number of performed triggering can be limited to one trigger per display clock.

Trigger level

7. Trigger level
Trigger level for analog sources

Posttrigger to right border

8. Posttrigger to right border
Activate this checkbox to set the posttrigger time automatically to the right end of the time axis.
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.