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Reference
Triggering
Triggers determine when the digitizing oscilloscope starts acquiring and
displaying a waveform. The TDS 600A has four types of trigger: edge, logic,
pulse, and, with option 5, video.
Although these triggers are unique, they have some common characteristics
that can be defined and modified using the Trigger menu, buttons, and knob.
This article discusses these common characteristics.
To learn about the general concept of triggering, see
Triggering
in the
Operat-
ing Basics
section
.
To learn more about using specific triggers and using the
delayed trigger system, see
For More Information
on page 3-145.
The trigger buttons and knob let you quickly adjust the trigger level or force a
trigger (see Figure 3-76).
Trigger Status
Lights
Figure 3-76: TRIGGER Controls and Status Lights
MAIN LEVEL Knob
The MAIN LEVEL knob lets you manually change the trigger level when
triggering in Edge mode or certain threshold levels when triggering in Logic or
Pulse modes. It adjusts the trigger level (or threshold level) instantaneously
no matter what menu, if any, is displayed.
Trigger Button and
Knobs