Pxi 5142 infinite acq

Hi,
i have problem to start infinite acq in pxi5142 board
1) card is set to complex acq
2) ddc is enabled
3) ddc freq translation is enabled
4) I am trying to set cont. acq with this function
niScope_ConfigureTriggerSoftware (vi, 0.0, 0.0);
5) but during niScope_InitiateAcquisition I am getting 
error that software trigger is not available... only: none, immediate, edge
6) what i need is to start infinite, continous acq,
niScope_SetAttributeViInt32(m_hVi, VI_NULL, NISCOPE_ATTR_FETCH_RELATIVE_TO, NISCOPE_VAL_READ_POINTER)
and fetch the data with 
niScope_FetchComplex
What I can do ?
/rb
Solved!
Go to Solution.

Are you setting the NISCOPE_ATTR_REF_TRIGGER_DETECTOR_LOCATION attribute to  NISCOPE_VAL_DDC_OUTPUT?
 Either set it to  NISCOPE_VAL_ANALOG_DETECTION_CIRCUIT or leave it unset.

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