ADLINK Technology cPCI-9116 Guía de usuario descargar pdf (Pagina 54)

44 • 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

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