IviSpecAn_QueryReferenceMarker
IviSpecAnDeltaMarker Capability Group
C Function Prototype
ViStatus IviSpecAn_QueryReferenceMarker (ViSession vi, ViReal64* referenceMarkerAmplitude, ViReal64* referenceMarkerPosition);
Purpose
This function returns the amplitude and position of the reference marker.
If the IVISPECAN_ATTR_MARKER_TYPE attribute is not Delta, this function returns the Not Delta Marker error (0xBFFA2002).
Parameters
| Name | Type | Description |
|---|---|---|
| vi | ViSession | The ViSession handle that you obtain from the IviSpecAn_init or IviSpecAn_InitWithOptions function. The handle identifies a particular instrument session. Default Value: None |
| referenceMarkerAmplitude | ViReal64 | Returns the reference marker when the active marker is a delta marker. This returns the value of the IVISPECAN_ATTR_REFERENCE_MARKER_AMPLITUDE attribute. Default Value: None |
| referenceMarkerPosition | ViReal64 | Returns the reference marker position when the active marker is a delta marker. This returns the value of the IVISPECAN_ATTR_REFERENCE_MARKER_POSITION attribute. Default Value: None |