Promax OD-603 Manual page 90

Check the Trigger State Indicator on the top of the screen, if it is not
Ready, push down the Run/Stop button and start acquiring, wait for
trigger to happen. If a signal reaches to the set trigger level, one
sampling will be made and then displayed in the screen. By using this
approach, a random pulse can be captured easily. For instance, if we
want to find a burst burr of high amplitude, set the trigger level to a
slightly higher value of the average signal level, press the Run/Stop
button and wait a trigger. Once there is a burr occurring, the
instrument will trigger automatically and record the waveform during
the period around the trigger time. By turning the HORIZONTAL
POSITION knob in the horizontal control area in the panel, you can
change the horizontal triggering position to obtain the negative delay,
making an easy observation of the waveform before the burr occurs
(see Figure 82).
Figure 82. Capturing a Single Signal.
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June 2016 Page