To Define An Edge Trigger; To Use Line Triggering - HP 54645A User's And Service Manual

Triggering HP 54645A/D Oscilloscopes

To define an edge trigger

To define an edge trigger
Press .
1
Edge
Select a channel as the trigger source using either the Select knob or
2
by pressing a
Trigger Source
You can choose a channel that is turned off as the source for the edge
trigger.
Press one of the Edge
3
occur on the rising or falling edge.
Rotating the Select Knob does not Affect Trigger Channel
When selecting a digital channel as the source, after you have set the edge
trigger condition, and selected another menu, continuously rotating the Select
knob will not affect the channel used for the trigger condition. The trigger edge
is not changed until you select a slope. This frees up the Select knob for other
operations, such as measurements.

To use line triggering

This power line edge triggering, when selected, overrides any other settings.
Do not confuse the power line triggering with TV line triggering.
Press . Then select
1
Edge
Select the rising or falling edge softkey.
2
3-16
softkey.
softkeys to choose whether the trigger will
Line.