ADLINK PXI-2208 - Manual (Page 63)

Operation Theory 51
Post-Trigger or Delay-trigger Acquisition with re-trigger
Use post-trigger or delay-trigger acquisition with re-trigger
function in applications where you want to collect data after
several trigger events. The number of scans after each trigger
is specified in PSC_counter, and users could program
Retrig_no to specify the re-trigger numbers. Figure 4-12 illus-
trates an example. In this example, two scans of data is
acquired after the first trigger signal, then the card waits for the
re-trigger signal (re-trigger signals which occur before the first
two scans is completed will be ignored). When the re-trigger
signal occurs, two more scans are performed. The process
repeats until specified amount of re-trigger signals are
detected. The total acquired data length = NumChan_counter *
PSC_counter * Re-trig_no.
Figure 4-12: Post trigger with Re-trigger
(NumChan _Counter=4, PSC_Counter=2, retrig_no=3)
Acquisition_in_progress
Scan_start
AD_conversion
Scan_in_progress
(SSHOUT)(pin8 on CN2)
Acquired & stored data
(6 scans)
Operation start
Trigger