Figure 4-7: pre-trigger with m_enable=1 – ADLINK PXI-2208 User Manual

Page 58

Operation Theory

Figure 4-7: Pre-trigger with M_enable=1

NOTE

The PSC_counter is set to 0 in pre-trigger acquisition

mode.

Acquisition_in_progress

Scan_start

AD_conversion

Scan_in_progress
(SSHOUT)(pin2 on CN2)

(M_counter = M = 3, NumChan_counter=4, PSC_counter=0)

Aquired data

Acquired & stored data
(M scans)

Trigger signals which occur in the shadow
region(the first M scans) will be ignored

Operation start

Trigger

The first M scans

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