Tektronix 475A - Trigger Controls, Connectors, and

30. SLOPE—Selects the slope of the trigger signal that
starts the sweep.
+: Sweep can be triggered from the positive-going
portion of a trigger signal.
~: Sweep can be triggered from the negative-going
portion of a trigger signal.
Correct SLOPE setting is important in obtaining a
display when only a portion of a cycle is being displayed.
31. LEVEL—Selects the amplitude point on the trigger
signal at which the sweep is triggered. It is usually
adjusted for the desired display after trigger SOURCE,
Fig. 5. Trigger controls, connectors, and indicators. COUPLING and SLOPE have been selected.
10 475A/DM44 Operators @