Measurement Computing Personal Daq rev.6.0 - Manual (Page 141)

Personal Daq User’s Manual Appendix B, 887095 API Commands B-9
daqAdcSetAcq
DLL Function daqAdcSetAcq(DaqHandleT handle, daqAdcAcqMode mode, DWORD preTrigCount, DWORD
postTrigCount);
C daqAdcSetAcq(DaqHandleT handle, DaqAdcAcqMode mode, DWORD preTrigCount, DWORD
postTrigCount);
Visual BASIC VBdaqAdcSetAcq&(ByVal handle&, ByVal mode&, ByVal preTrigCount&, ByVal
postTrigCount&)
Delphi daqAdcSetAcq(handle:DaqHandleT; mode:daqAdcAcqMode; preTrigCount:DWORD;
postTrigCount:DWORD)
handle Handle to the device for which the ADC acquisition is to be configured
mode Selects the mode of the acquisition
PreTrigCount Number of pre-trigger ADC scans to be collected
Parameters
PostTrigCount Number of post-trigger ADC scans to be collected
Returns DerrNoError No error
See Also daqAdcArm, daqAdcDisarm, daqAdcSetTrig
Program References ADCEX1.C, DACEX1.C, DYN32ENH.C, DAQEX.FRM (VB), ADCEX.PAS (Delphi)
Used With All devices
Description
daqAdcSetAcq
allows you to characterize the acquisition mode and the pre- and post-trigger durations. The mode parameter describes
the style of data collection. The preTrigCount and postTrigCount parameters specify the respective durations, or lengths, of the
pre-trigger and post-trigger acquisition states.
Acquisition modes can be defined as follows:
•
DaamNShot - Once triggered, continue acquisition until the specified post-trigger count has been satisfied. Once the post-trigger
count has been satisfied, the acquisition will be automatically disarmed.
•
DaamInfinitePost - Once triggered, continue the acquisition indefinitely until the acquisition is disabled by the daqAdcDisarm
function.
•
DaamPrePost - Begin collecting the specified number of pre-trigger scans immediately upon issuance of the daqAdcArm function.
The trigger will not be enabled until the specified number of pre-trigger scans have been collected. Once triggered, the acquisition
will then continue collecting post-trigger data until the post-trigger count has been satisfied. Once the post-trigger count has been
satisfied, the acquisition will be automatically disarmed.