Daqadcsetacq, Daqadcsetclocksource – Measurement Computing WaveBook rev.3.0 User Manual

Page 205

WaveBook User’s Manual,

6-24-99

daqX API - Command Reference D-9

daqAdcSetAcq

DLL Function

daqAdcSetAcq(DaqHandleT handle, DaqAdcAcqMode mode, DWORD preTrigCount, DWORD

postTrigCount);

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 the API Error Codes table at the end of this chapter).

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.

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.

daqAdcSetClockSource

DLL Function

daqAdcSetClockSource(DaqHandleT handle, daqAdcClockSource clockSource);

Visual BASIC

VbdaqAdcSetClockSource&(ByVal handle&, ByVal clockSource&)

Delphi

daqAdcSetClockSource(handle:DaqHandleT; clockSource:DaqAdcClockSource)

handle

Handle to the device for which to set the ADC clock source.

Parameters

clockSource

Specifies the clock source for ADC acquisitions.