Adlink DAQe-2502 Manual do Utilizador descarregar pdf (Página 34)

24 Operation Theory

Scan Timing and Procedure

There are four counters that need to be specified prior to program-

mable scans. Refer to Table 4-4 for details.

Counter Name Width Description Notes

SI_counter 24-bit

Scan Interval defines the

interval between each

scan.

Scan Interval =

SI_counter / Time-base*

SI2_counter 24-bit

Sampling Interval defines

the interval between each

sampled channel.

Sampling Interval =

SI2_counter / Timebase*

PSC_counter 24-bit

Post Scan Counts defines

how many scans to be

performed with respect to

each trigger.

Delay_counter 16-bit

Define the delay time for

scan after trigger.

Delay Time =

(Delay_counter / Time-

base*), Timebase*=40M

for DAQ/DAQe/PXI-2502/

2501

Table 4-4: Summary of Counters for Programmable Scan

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 73 74

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