Operation Theory
21
The relationship between counters and acquisition timing is illus-
trated in Figure 4-1.
Figure 4-1: Timing for Scan
NOTE:
1. The maximum A/D sampling rate is 400KHz for DAQ/
PXI-2500 series therefore the minimum setting of
SI2_counter is 100.
2. The Scan Interval can not be smaller than the interval of
data Sampling Interval multiple by the Number of chan-
nels per Scan, i.e.: SI_counter >= SI2_counter *
NumChan_Counter
Trigger Mode
Post-Trigger Acquisition
Use post-trigger acquisition when users want to perform scans
right after a trigger signal. The number of scans to be per-
