929958-00 Rev A
32
BASICS
Trigger Source
Trigger Mode
Trigger Type
Trigger Slope
Trigger Level
Trigger Coupling
Level
Position
Pre/Post-Trigger
–
appears at corner of grid
when trigger point is no-longer visible
.
Triggers tell the instrument when to perform an acquisition. The acquisition starts as soon as the trigger is armed
and
all trigger conditions are met,
unless postponed by a Holdoff count of time or number of trigger events. Trigger types and modes are described at more length in the
HDO8000A/
MDA800A Oscilloscopes Operator’s Manual.
From the Front Panel
Trigger Descriptor Box
Trigger Indicators
Select
Trigger Mode
:
Auto – trigger after preset period if no valid trigger.
Normal – trigger repeatedly when all conditions met.
Single – trigger once when all conditions met.
Stop – stop acquisition.
Open Trigger
setup dialog.
Trigger
fired.
Trigger
armed.
Raise/lower
trigger Volt/
Amp
Level
.
Push to
Find Level
.
Trigger