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The traditional delayed trigger mode called "Runs After" is served by the TDS5000B feature
Horizontal Delay. You can use horizontal delay to delay acquisition from any trigger event,
whether from the A (Main) trigger alone or from a sequential trigger that uses both the A (Main)
and B (Delayed) triggers. See Triggering with Horizontal Delay On on page 246 for more
information.
Keep in mind the following when using sequential triggers:
 In most cases, you will set separate trigger sources for the A (Main) and B (Delayed) triggers.
 Sequential triggering for Trigger after Time or Trigger on nth Event is available for the Edge,
Glitch, Width, or Timeout types. It is not available for the rest of the trigger types.
 The B trigger is always the Edge type.
Triggering with Horizontal Delay Off
The following figure compares the sequential trigger choices A Only, Trig After Time, and Trig
on nth Event when horizontal delay is off. Each illustration shows where pretrigger and posttrigger
data is acquired relative to the trigger event.
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