IviSpecAn Extension Capability Groups
The IviSpecAn class driver identifies VIs and properties that belong to an extension group with the following abbreviations. Instrument specific drivers are not required to implement any of the extension capability groups. If you use VIs and properties that belong to extension capability groups, every instrument specific driver that you use must implement those extensions.
| Group Name | Description |
|---|---|
| IviSpecAnMultitrace | Defines extensions for analyzers capable of performing simple mathematical VIs on one or more traces. |
| IviSpecAnMarker |
Supports spectrum analyzers that have markers. Markers are applied to traces and used for a wide range of operations. Some operations are simple, such as reading an amplitude value at an X-axis position, while others operations are complex, such as signal tracking |
| IviSpecAnTrigger | Specifies the source of the trigger signal that causes the analyzer to leave the Wait-For-Trigger state. |
| IviSpecAnExternalTrigger | Specifies the external trigger level and external trigger slope when the Trigger Source property is set to external, which causes the analyzer to leave the Wait-For-Trigger state. |
| IviSpecAnSoftwareTrigger | Supports spectrum analyzers that can acquire traces based on a software trigger signal. You can send a software trigger to cause signal output to occur. Affects instrument behavior when the Trigger Source property is set to Software. |
| IviSpecAnVideoTrigger | Specifies the video trigger level and video trigger slope when the Trigger Source property is set to Video, which causes the analyzer to leave the Wait-For-Trigger state. |
| IviSpecAnDisplay | Controls the display related properties. |
| IviSpecAnMarkerType | Supports analyzers that have multiple marker types. |
| IviSpecAnDeltaMarker | Supports analyzers that have delta-marker capabilities. A delta marker has the same properties as a normal marker except that its position and amplitude are relative to a fixed reference point. This fixed reference point is defined when the marker is converted from a normal marker to a delta marker. |
| IviSpecAnExternalMixer | Allows the use of an analyzer to measure values that are outside of the normal frequency range of the equipment. When using an external mixer, many of the settings of the analyzer have to be carefully converted to allow the user to know what is meant by the values read. |
| IviSpecAnPreselector | Controls preselectors. Preselectors are a network of filters and preamplifiers that are built into one unit for reducing noise and increasing dynamic range of an analyzer. Preselectors are often separate instruments, but they are instruments that only work with spectrum analyzers. Some analyzers have internal preselectors. |