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Chapter 4 Hardware Overview
NI 5102 User Manual 4-12 ni.com
Figure 4-9 shows the relevant timing signals for a typical pretriggered
acquisition. The illustration represents five pretrigger and five posttrigger
scans, and above-high-level analog triggering is used. See the Analog
Trigger Circuit section later in this chapter for more information on analog
trigger types.
Figure 4-9. Pretrigger Acquisition
Start Trigger
Scan Clock
Scan Counter
Terminal Count
First Scan First Posttrigger Scan
Stop Trigger
End of
Acquisition
= Discarded Points
= Pretrigger Points
= Posttrigger Points
Trigger Level
Points Discarded Five Pretrigger, Five Posttrigger
Points Stored