IviSpecAn_QueryMarker
IviSpecAnMarker Capability Group
C Function Prototype
ViStatus IviSpecAn_QueryMarker (ViSession vi, ViReal64* markerPosition, ViReal64* markerAmplitude);
Purpose
This function returns the horizontal position and the marker amplitude level of the active marker.
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 |
| markerPosition | ViReal64 | Returns the horizontal position of the active marker from the IVISPECAN_ATTR_MARKER_POSITION attribute. |
| markerAmplitude | ViReal64 | Returns the amplitude value of the active marker from the IVISPECAN_ATTR_MARKER_AMPLITUDE attribute. Units: The units are specified by the IVISPECAN_ATTR_AMPLITUDE_UNITS attribute, except when the IVISPECAN_ATTR_MARKER_TYPE attribute is set to Delta. When IVISPECAN_ATTR_MARKER_TYPE is set to Delta the units are dB. |