Measurement Computing TempBook rev.3.0 - Manual (Page 134)

11-10 daqCommand Reference (Enhanced API) TempBook User’s Manual
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)
Parameters
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
postTrigCount Number of post-trigger ADC scans to be collected
Returns DerrNoError - No error (also, refer to API Error Codes on page 11-39)
See Also daqAdcArm, daqAdcDisarm, daqAdcSetTrig
Program References ADCEX1.C, DACEX1.C, DYN32ENH.C, DAQEX.FRM (VB), ADCEX.PAS (Delphi)
Used With All devices
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.
•
DaamNShotRearm - Once triggered, continue the acquisition for the specified post-trigger
count, then re-arm the acquisition with the same acquisition configuration parameters as
before. The automatic re-arming of the acquisition may be disabled at any time by issuing a
daqAdcDisarm
.
•
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.