ADLINK cPCI-9116 - Manual (Page 54)

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• Operation Theory
(M_Counter=M=2, DIV_Counter=4, SC_Counter=N=2)
Acquisition_in_progress
Scan_start
AD_conversion
Scan_in_progress
(SSH_OUT)(pin47)
Acquired data
Acquired & stored data
(M+N scans)
Trigger occurs when a scan is in progress
Operation start
ExtTrg(pin46)
M scans before
trigger N scans
after trigger
Figure 15: Middle trigger (trigger with scan is in progress)
Post-Trigger Acquisition
Use post-trigger acquisition in applications where you want to collect data after
an external trigger event. The number of scans after the trigger is specified in
SC_counter, as illustrated in fig 16. The total acquired data length =
DIV_counter *SC_counter.
(DIV_Counter=4, SC_Counter=3)
Acquisition_in_progress
Scan_start
AD_conversion
Scan_in_progress
(SSH_OUT)
Acquired & stored data
(3 scans)
Operation start
ExtTrg
Figure 16: Post trigger