SDM3055 Series Digital Multimeter User Manual
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3. Set the number of samples or trigger.
Press [Samples/Trigger] to set sample count.
4. Set the VMC Out.
Press [VMC Out] to choose Positive or Negative polarity.
External Trigger
The external trigger signal will be input via EXT TRIG interface on the rear panel. External trigger
parameters that need to be set up include delay, samples /trigger, slope and VMC out.
Operating Steps:
1. Press , then select [Trg Src] ā [Ext] or press on the front panel directly to enable
External Trigger.
Diagram 2-55 Setting interface of Ext Trigger
2. Set the polarity of slope.
Press [Slope] to choose Positive or Negative polarity.
3. Set the delay.
Press [Delay] to choose Auto or Manual mode.
4. Set the number of samples or trigger.
Press [Samples/Trigger] to set sample count.
5. Set the VMC Out.
In External Trigger mode, the Multimeter could output a pulse signal through the VM COMP
interface on the rear panel after sampling signal is finished.