Adlink cPCI-9116 Bedienungsanleitung PDF herunterladen (Seite 53)

Operation Theory • 43

(M_Counter=M=3, DIV_Counter=4, SC_Counter=N=1)

A

cquisition_in_progress

Scan_start

A

D_conversion

Scan_in_progress

(

SSH_OUT

)(pin47)

Aq

uired data

A

cquired & stored data

(M+N scans)

O

p

eration start

ExtTrg(pin46)

M scans before

trigger

N scans

after trigger

Trigger signals which occur in the shadow

region(the first M scans) will be ignored

The first M scans

Figure 14: Middle trigger with M_enable = 1

If an external trigger event occurs when a scan is in progress, the stored N

scans of data would include this scan.

And the first stored data will always

be the first channel entry of a scan,

as illustrated in Fig 15.

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 97 98

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