Trigger Setup
Selecting Triggers
Trigger Type Trigger Conditions
Edge
Trigger on a rising edge, a falling edge, or both edges as
defined by the
slope control. Coupling choices are DC,
LF Reject, H F Reject, and Noise Reject.
Edge triggers are the simplest and most commonly
used trigge
r type, with both analog and digital signals.
An edge trigger event occurs when the trigger source
passes through a specified voltage level in the specified
direction.
Sequence
(B Trigger)(not
available with an
edge slope
of
Both)
Combine an
edge A Event (Main) trigger with the B
Event (Delayed) trigger to capture more complex signals.
(See page 58, Act on Event.)
Time. Aft
er the A Event occurs, the trigger system waits
the specified amount of time, and then looks for the B
Event before triggering and displaying the waveform.
Events. After the A E vent occurs, the trigger system
looks fo
r a specified number of B Events before
triggering and displaying the waveform.
Pulse Width Trigger on pulses that are less than, greater than, equal
to, not e
qual to, a specified time. Additionally, you can
trigger when a pulse width is within or outside a range
of two different specified times. You can also trigger on
positi
ve or negative pulses. Pulse width triggers are
primarily used on digital signals.
Timeo
ut
Trigger when no pulse is detected within a specified time.
Runt Trigger on a pulse amplitude that crosses one threshold
but f
ails to cross a second threshold before recrossing
the first. You can detect positive or negative (or either)
runts, or only those wider than, less than, greater than,
equ
al to, or not equal to a specified width. Runt triggers
are primarily used on digital signals.
80 MSO4000B and DPO 4000B Series Oscilloscopes User Manual
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