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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 OperĆ
ating Basics section. To learn more about using specific triggers and using
the delayed trigger system, see For More Information on page 3Ć135.
The trigger buttons and knob let you quickly adjust the trigger level or force
a trigger (see Figure 3Ć71).
Trigger Status Lights
Figure 3Ć71:ăTRIGGER 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) instantaĆ
neously no matter what menu, if any, is displayed.
Trigger Button and
Knobs