Anritsu Series MS278XB - Manual (Page 174)

Basic Measurement Setups Measurements
5-18 MS278XB OM
3. Press in the Trigger Level parameter field and enter the trigger level using the keypad, then select the
appropriate terminator from the fly-out menu below:
4. Select the trigger slope by pressing the Rising/Falling toggle button.
5. To enter a trigger delay, press in the Trigger Delay parameter field and enter a value using the keypad,
then select the appropriate terminator from the fly-out menu below: