Checking that the cro is triggered correctly

Before any measurements can be made we must ensure that the CRO is correctly triggered. The best way to do this is to follow the steps listed below. First check that the Trigger Level Control is set in the AUTO position. This is done by pulling the knob towards you.Now we put the Slope Control to the Positive selection.Ensure that the Sync Selector is in the A.C. position.Finally make sure that unless otherwise advised, leave the Source Selector in the INT position.