User guide

44 • Operation Theory
(M_Counter=M=2, DIV_Counter=4, SC_Counter=N=2)
A
cquisition_in_progress
Scan_start
A
D_conversion
Scan_in_progress
(SSH_OUT)(pin47)
A
c
q
uired data
A
cquired & stored data
(M+N scans)
Trigger occurs when a scan is in progress
O
p
eration 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)
A
cquisition_in_progress
Scan_start
A
D_conversion
Scan_in_progress
(SSH_OUT)
A
cquired & stored data
(3 scans)
O
p
eration start
ExtTrg
Figure 16: Post trigger