Position the Trigger Start Position toward the left edge of the display (this is the little orange triangle at the top of the grid; move it using the Horizontal Position knob). Using the sample captur...Position the Trigger Start Position toward the left edge of the display (this is the little orange triangle at the top of the grid; move it using the Horizontal Position knob). Using the sample capture/freeze ability of the oscilloscope (the “single shot” button on the extreme right side) adjust the Trigger Level control so that a transient triggers the oscilloscope.