Agilent Technologies 54622A User Manual page 13

Getting Started
The oscilloscope's high-speed display can be used to isolate infrequently
changing signals. You can then use the characteristics of these signals
to help refine the trigger specification. For more information on
triggering, data acquisition, data examination and measurement, and
configuration, see the later chapters.
Using the Oscilloscope, and Refining the Trigger Specification
1-3